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ACP | Articles | Volume 19, issue 12
Atmos. Chem. Phys., 19, 8175–8187, 2019
https://doi.org/10.5194/acp-19-8175-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-19-8175-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 19, 8175–8187, 2019
https://doi.org/10.5194/acp-19-8175-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-19-8175-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article 24 Jun 2019
Research article | 24 Jun 2019
Influence of functional groups on toxicity of carbon nanomaterials
Yongchun Liu et al.
Related authors
Lubna Dada, Ilona Ylivinkka, Rima Baalbaki, Chang Li, Yishuo Guo, Chao Yan, Lei Yao, Nina Sarnela, Tuija Jokinen, Kaspar R. Daellenbach, Rujing Yin, Chenjuan Deng, Biwu Chu, Tuomo Nieminen, Yonghong Wang, Zhuohui Lin, Roseline C. Thakur, Jenni Kontkanen, Dominik Stolzenburg, Mikko Sipilä, Tareq Hussein, Pauli Paasonen, Federico Bianchi, Imre Salma, Tamás Weidinger, Michael Pikridas, Jean Sciare, Jingkun Jiang, Yongchun Liu, Tuukka Petäjä, Veli-Matti Kerminen, and Markku Kulmala
Atmos. Chem. Phys., 20, 11747–11766, https://doi.org/10.5194/acp-20-11747-2020, https://doi.org/10.5194/acp-20-11747-2020, 2020
Short summary
Short summary
We rely on sulfuric acid measurements in four contrasting environments, Hyytiälä, Finland; Agia Marina, Cyprus; Budapest, Hungary; and Beijing, China, representing semi-pristine boreal forest, rural environment in the Mediterranean area, urban environment, and heavily polluted megacity, respectively, in order to define the sources and sinks of sulfuric acid in these environments and to derive a new sulfuric acid proxy to be utilized in locations and during periods when it is not measured.
Jenni Kontkanen, Chenjuan Deng, Yueyun Fu, Lubna Dada, Ying Zhou, Jing Cai, Kaspar R. Daellenbach, Simo Hakala, Tom V. Kokkonen, Zhuohui Lin, Yongchun Liu, Yonghong Wang, Chao Yan, Tuukka Petäjä, Jingkun Jiang, Markku Kulmala, and Pauli Paasonen
Atmos. Chem. Phys., 20, 11329–11348, https://doi.org/10.5194/acp-20-11329-2020, https://doi.org/10.5194/acp-20-11329-2020, 2020
Short summary
Short summary
To estimate the impacts of atmospheric aerosol particles on air quality, knowledge of size distributions of particles emitted from anthropogenic sources is needed. We introduce a new method for determining size-resolved particle number emissions from measured particle size distributions. We apply our method to data measured in Beijing, China. We find that particle number emissions at our site are dominated by emissions of particles smaller than 30 nm, originating mainly from traffic.
Tommy Chan, Runlong Cai, Lauri R. Ahonen, Yiliang Liu, Ying Zhou, Joonas Vanhanen, Lubna Dada, Yan Chao, Yongchun Liu, Lin Wang, Markku Kulmala, and Juha Kangasluoma
Atmos. Meas. Tech., 13, 4885–4898, https://doi.org/10.5194/amt-13-4885-2020, https://doi.org/10.5194/amt-13-4885-2020, 2020
Short summary
Short summary
Using a particle size magnifier (PSM; Airmodus, Finland), we determined the particle size distribution using four inversion methods and compared each method to the others to establish their strengths and weaknesses. Furthermore, we provided a step-by-step procedure on how to invert measured data using the PSM. Finally, we provided recommendations, code and data related to the data inversion. This is an important paper, as no operating procedure exists regarding how to process measured PSM data.
Tianzeng Chen, Jun Liu, Qingxin Ma, Biwu Chu, Peng Zhang, Jinzhu Ma, Yongchun Liu, Cheng Zhong, Pengfei Liu, Yafei Wang, Yujing Mu, and Hong He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-792, https://doi.org/10.5194/acp-2020-792, 2020
Preprint under review for ACP
Short summary
Short summary
Effects of photochemical aging on the formation and evolution of summertime secondary aerosol was systematically investigated in suburb of Beijing. Higher PM1 concentration accompanied longer photochemical age (ta). Sulfate and more-oxidized OOA formation were significantly sensitive to the increase of
ta, and their contribution were greatly enhanced at elevated ta levels. Our results suggested that photochemical aging process played a crucial role in the PM1 and O3 pollution in summertime.
Zhuohui Lin, Yonghong Wang, Feixue Zheng, Ying Zhou, Yishuo Guo, Zemin Feng, Chang Li, Yusheng Zhang, Simo Hakala, Tommy Chan, Chao Yan, Kaspar R. Daellenbach, Biwu Chu, Lubna Dada, Juha Kangasluoma, Lei Yao, Xiaolong Fan, Wei Du, Jing Cai, Runlong Cai, Tom V. Kokkonen, Putian Zhou, Lili Wang, Tuukka Petäjä, Federico Bianchi, Veli-Matti Kerminen, Yongchun Liu, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-223, https://doi.org/10.5194/acp-2020-223, 2020
Preprint under review for ACP
Jing Cai, Biwu Chu, Lei Yao, Chao Yan, Liine M. Heikkinen, Feixue Zheng, Chang Li, Xiaolong Fan, Shaojun Zhang, Daoyuan Yang, Yonghong Wang, Tom V. Kokkonen, Tommy Chan, Ying Zhou, Lubna Dada, Yongchun Liu, Hong He, Pauli Paasonen, Joni T. Kujansuu, Tuukka Petäjä, Claudia Mohr, Juha Kangasluoma, Federico Bianchi, Yele Sun, Philip L. Croteau, Douglas R. Worsnop, Veli-Matti Kerminen, Wei Du, Markku Kulmala, and Kaspar R. Daellenbach
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-248, https://doi.org/10.5194/acp-2020-248, 2020
Revised manuscript accepted for ACP
Short summary
Short summary
By applying both OA-PMF and Size-PMF at the same urban measurement site in Beijing, similar particle source-types, including vehicular emissions, cooking emissions and secondary formation-related sources were resolved by both frameworks and agreed well. It is also found that in the absence of new-particle formation, vehicular and cooking emissions dominate the particle number concentration while secondary particulate matter governed PM2.5 mass during spring and summer in Beijing.
Jingsha Xu, Shaojie Song, Roy M. Harrison, Congbo Song, Lianfang Wei, Qiang Zhang, Yele Sun, Lu Lei, Chao Zhang, Xiaohong Yao, Dihui Chen, Weijun Li, Miaomiao Wu, Hezhong Tian, Lining Luo, Shengrui Tong, Weiran Li, Junling Wang, Guoliang Shi, Yanqi Huangfu, Yingze Tian, Baozhu Ge, Shaoli Su, Chao Peng, Yang Chen, Fumo Yang, Aleksandra Mihajlidi-Zelić, Dragana Đorđević, Stefan J. Swift, Imogen Andrews, Jacqueline F. Hamilton, Ye Sun, Agung Kramawijaya, Jinxiu Han, Supattarachai Saksakulkrai, Clarissa Baldo, Siqi Hou, Feixue Zheng, Kaspar R. Daellenbach, Chao Yan, Yongchun Liu, Markku Kulmala, Pingqing Fu, and Zongbo Shi
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2020-156, https://doi.org/10.5194/amt-2020-156, 2020
Revised manuscript accepted for AMT
Short summary
Short summary
An inter-laboratory comparison exercise was conducted for the first time to examine the difference of water-soluble inorganic ions (WSII) measured by 10 labs using Ion Chromatography and by 2 online Aerosol Chemical Speciation Monitor method. Major ions including SO42−, NO3−, NH4+ agreed well in 10 IC labs, and correlated well with ACSM. WSII inter-lab variability strongly affected aerosol acidity results based on ion balance, but aerosol pH computed by ISORROPIA-II were very similar.
Yishuo Guo, Chao Yan, Chang Li, Zemin Feng, Ying Zhou, Zhuohui Lin, Lubna Dada, Dominik Stolzenburg, Rujing Yin, Jenni Kontkanen, Kaspar R. Daellenbach, Juha Kangasluoma, Lei Yao, Biwu Chu, Yonghong Wang, Runlong Cai, Federico Bianchi, Yongchun Liu, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2019-1111, https://doi.org/10.5194/acp-2019-1111, 2020
Preprint under review for ACP
Short summary
Short summary
Fog, cloud, haze are very common natural phenomena and all of them have a great impact on global climate. Sulfuric acid (SA) is one of the key compounds forming these suspended particles (aerosols), and therefore the concentration, source and sink of SA is very important. Daytime SA production is driven by OH radical oxiation, and here this article shows that ozonolysis of alkenes played a major role in nighttime SA formation in urabn Beijing under clean conditions.
Yongchun Liu, Yusheng Zhang, Chaofan Lian, Chao Yan, Zeming Feng, Feixue Zheng, Xiaolong Fan, Yan Chen, Weigang Wang, Biwu Chu, Yonghong Wang, Jin Cai, Wei Du, Kaspar R. Daellenbach, Juha Kangasluoma, Federico Bianchi, Joni Kujansuu, Tuukka Petäjä, Xuefei Wang, Bo Hu, Yuesi Wang, Maofa Ge, Hong He, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-150, https://doi.org/10.5194/acp-2020-150, 2020
Revised manuscript accepted for ACP
Short summary
Short summary
Understanding of the chemical/physical processes leading to atmospheric aerosol particle formation is crucial to devising effective mitigation strategies to protect the public and reduce uncertainties in climate predictions. We found that the photolysis of nitrous acid could promote the formation of organic and nitrate aerosol and traffic-related emission is the major contributor to ambient nitrous acid in haze days of wintertime in Beijing.
Biwu Chu, Yali Wang, Weiwei Yang, Jinzhu Ma, Qingxin Ma, Peng Zhang, Yongchun Liu, and Hong He
Atmos. Chem. Phys., 19, 14777–14790, https://doi.org/10.5194/acp-19-14777-2019, https://doi.org/10.5194/acp-19-14777-2019, 2019
Short summary
Short summary
This study found that the coexisting NO2 and/or C2H2 had significant influences on heterogeneous oxidation of SO2 due to the ubiquitous interactions between organic and inorganic species, and their effects were different under dark conditions or with UV irradiation. The experimental results of this study highlighted the requirement to consider the influence of coexisting organics and other inorganic gases in the heterogeneous oxidation kinetics of SO2.
Tianzeng Chen, Yongchun Liu, Qingxin Ma, Biwu Chu, Peng Zhang, Changgeng Liu, Jun Liu, and Hong He
Atmos. Chem. Phys., 19, 8063–8081, https://doi.org/10.5194/acp-19-8063-2019, https://doi.org/10.5194/acp-19-8063-2019, 2019
Short summary
Short summary
Effects of SO2 and NH3 on SA formation from unburned gasoline vapor were investigated in a 30 m3 smog chamber. With the increase in SO2 and NH3 concentrations, formation of SA and each of its chemical species was promoted. Meanwhile, NPF and particle size growth were also significantly enhanced. This work indicates that gasoline evaporation emissions will be a significant source of SA and sulfur- and nitrogen-containing organics, especially in the presence of high concentrations of SO2 and NH3.
Changgeng Liu, Tianzeng Chen, Yongchun Liu, Jun Liu, Hong He, and Peng Zhang
Atmos. Chem. Phys., 19, 2687–2700, https://doi.org/10.5194/acp-19-2687-2019, https://doi.org/10.5194/acp-19-2687-2019, 2019
Short summary
Short summary
The effect of SO2 at atmospheric levels on SOA formation and its oxidation state during 2-methoxyphenol photooxidation was investigated with various inorganic seed particles. The presence of SO2 increased SOA yield and oxidation state, suggesting that the functionalization reaction should be more dominant than the oligomerization reaction. SO2 and seed particles were found to have a synergetic contribution to SOA formation. The results demonstrate the important role of SO2 in SOA formation.
Changgeng Liu, Yongchun Liu, Tianzeng Chen, Jun Liu, and Hong He
Atmos. Chem. Phys., 19, 2001–2013, https://doi.org/10.5194/acp-19-2001-2019, https://doi.org/10.5194/acp-19-2001-2019, 2019
Short summary
Short summary
The rate constant and SOA formation for the OH-initiated reaction of eugenol were studied for the first time in an oxidation flow reactor. Significant SOA formation was observed, and SOA yield depended on precursor concentration and OH exposure. SO2 and NO2 both enhanced SOA yields. In addition, NO2 participated in OH-initiated reaction and produced organic nitrates. The results could be helpful for further understanding SOA formation from the atmospheric oxidation of methoxyphenols.
Yiqun Lu, Chao Yan, Yueyun Fu, Yan Chen, Yiliang Liu, Gan Yang, Yuwei Wang, Federico Bianchi, Biwu Chu, Ying Zhou, Rujing Yin, Rima Baalbaki, Olga Garmash, Chenjuan Deng, Weigang Wang, Yongchun Liu, Tuukka Petäjä, Veli-Matti Kerminen, Jingkun Jiang, Markku Kulmala, and Lin Wang
Atmos. Chem. Phys., 19, 1971–1983, https://doi.org/10.5194/acp-19-1971-2019, https://doi.org/10.5194/acp-19-1971-2019, 2019
Short summary
Short summary
Gaseous sulfuric acid is one of the key precursors for atmospheric new particle formation processes, but its measurement remains challenging. This work develops an estimation method for the gaseous sulfuric acid concentration in an urban environment in China using multiple atmospheric variables that are easier to measure. The consideration of the heterogeneous formation of HONO and the subsequent photo-production of OH radicals improves the performance of the estimation method.
Biwu Chu, Xiao Zhang, Yongchun Liu, Hong He, Yele Sun, Jingkun Jiang, Junhua Li, and Jiming Hao
Atmos. Chem. Phys., 16, 14219–14230, https://doi.org/10.5194/acp-16-14219-2016, https://doi.org/10.5194/acp-16-14219-2016, 2016
Short summary
Short summary
The interactive effects between inorganic and organic species under highly complex pollution conditions remain uncertain and were studied in a smog chamber. This study indicated that the synergistic formation of secondary inorganic and organic aerosol might increase the secondary aerosol load in the atmosphere and contribute haze pollution in eastern China. These synergistic effects were related to the heterogeneous process on aerosol surface and need to be considered in air quality models.
Y. Liu, Y. Ge, and H. He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2016-538, https://doi.org/10.5194/acp-2016-538, 2016
Revised manuscript not accepted
Short summary
Short summary
It is unclear about the role of mineral dust in the atmospheric chemistry of amines. Uptake by kaolinite has been found as an innegligible sink of amines based on the measured kinetics in the temperature range of 232–300 K. It reveals that uptake by mineral dust should be considered in models simulating the chemical cycle of amines in the atmosphere in the future. The results will also aid in understanding the possible impacts of amines on human health, air quality, and climate effects.
Y. Liu, J. Liggio, R. Staebler, and S.-M. Li
Atmos. Chem. Phys., 15, 13569–13584, https://doi.org/10.5194/acp-15-13569-2015, https://doi.org/10.5194/acp-15-13569-2015, 2015
Short summary
Short summary
This work for the first time demonstrated that organonitrogen compounds (NOC) can be formed efficiently via the uptake of ammonia by newly formed secondary organic aerosol using a smog chamber equipped with a HR-ToF-AMS. Based on the measured kinetics, this study suggests that light absorption by NOC in atmospheric particles may be important in regions where the BC contribution is minimal and NOC from ammonia should be considered with respect to overall deposition of nitrogen to ecosystems.
Y. Liu, L. Huang, S.-M. Li, T. Harner, and J. Liggio
Atmos. Chem. Phys., 14, 12195–12207, https://doi.org/10.5194/acp-14-12195-2014, https://doi.org/10.5194/acp-14-12195-2014, 2014
Lubna Dada, Ilona Ylivinkka, Rima Baalbaki, Chang Li, Yishuo Guo, Chao Yan, Lei Yao, Nina Sarnela, Tuija Jokinen, Kaspar R. Daellenbach, Rujing Yin, Chenjuan Deng, Biwu Chu, Tuomo Nieminen, Yonghong Wang, Zhuohui Lin, Roseline C. Thakur, Jenni Kontkanen, Dominik Stolzenburg, Mikko Sipilä, Tareq Hussein, Pauli Paasonen, Federico Bianchi, Imre Salma, Tamás Weidinger, Michael Pikridas, Jean Sciare, Jingkun Jiang, Yongchun Liu, Tuukka Petäjä, Veli-Matti Kerminen, and Markku Kulmala
Atmos. Chem. Phys., 20, 11747–11766, https://doi.org/10.5194/acp-20-11747-2020, https://doi.org/10.5194/acp-20-11747-2020, 2020
Short summary
Short summary
We rely on sulfuric acid measurements in four contrasting environments, Hyytiälä, Finland; Agia Marina, Cyprus; Budapest, Hungary; and Beijing, China, representing semi-pristine boreal forest, rural environment in the Mediterranean area, urban environment, and heavily polluted megacity, respectively, in order to define the sources and sinks of sulfuric acid in these environments and to derive a new sulfuric acid proxy to be utilized in locations and during periods when it is not measured.
Jenni Kontkanen, Chenjuan Deng, Yueyun Fu, Lubna Dada, Ying Zhou, Jing Cai, Kaspar R. Daellenbach, Simo Hakala, Tom V. Kokkonen, Zhuohui Lin, Yongchun Liu, Yonghong Wang, Chao Yan, Tuukka Petäjä, Jingkun Jiang, Markku Kulmala, and Pauli Paasonen
Atmos. Chem. Phys., 20, 11329–11348, https://doi.org/10.5194/acp-20-11329-2020, https://doi.org/10.5194/acp-20-11329-2020, 2020
Short summary
Short summary
To estimate the impacts of atmospheric aerosol particles on air quality, knowledge of size distributions of particles emitted from anthropogenic sources is needed. We introduce a new method for determining size-resolved particle number emissions from measured particle size distributions. We apply our method to data measured in Beijing, China. We find that particle number emissions at our site are dominated by emissions of particles smaller than 30 nm, originating mainly from traffic.
Peng Zhang, Tianzeng Chen, Jun Liu, Guangyan Xu, Qingxin Ma, Biwu Chu, Wanqi Sun, and Hong He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-929, https://doi.org/10.5194/acp-2020-929, 2020
Preprint under review for ACP
Short summary
Short summary
This work highlights the opposing effects of primary and secondary H2SO4 on both SOA formation and constitutes. Our findings revealed that a substantial increase in secondary H2SO4 particles promoted the SOA formation of ethyl methacrylate with increasing SO2 in the absence of seed particles. However, increased primary H2SO4 with seed acidity enhanced ethyl methacrylate uptake, but reduced its SOA formation in the presence of seed particles.
Tommy Chan, Runlong Cai, Lauri R. Ahonen, Yiliang Liu, Ying Zhou, Joonas Vanhanen, Lubna Dada, Yan Chao, Yongchun Liu, Lin Wang, Markku Kulmala, and Juha Kangasluoma
Atmos. Meas. Tech., 13, 4885–4898, https://doi.org/10.5194/amt-13-4885-2020, https://doi.org/10.5194/amt-13-4885-2020, 2020
Short summary
Short summary
Using a particle size magnifier (PSM; Airmodus, Finland), we determined the particle size distribution using four inversion methods and compared each method to the others to establish their strengths and weaknesses. Furthermore, we provided a step-by-step procedure on how to invert measured data using the PSM. Finally, we provided recommendations, code and data related to the data inversion. This is an important paper, as no operating procedure exists regarding how to process measured PSM data.
Tianzeng Chen, Jun Liu, Qingxin Ma, Biwu Chu, Peng Zhang, Jinzhu Ma, Yongchun Liu, Cheng Zhong, Pengfei Liu, Yafei Wang, Yujing Mu, and Hong He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-792, https://doi.org/10.5194/acp-2020-792, 2020
Preprint under review for ACP
Short summary
Short summary
Effects of photochemical aging on the formation and evolution of summertime secondary aerosol was systematically investigated in suburb of Beijing. Higher PM1 concentration accompanied longer photochemical age (ta). Sulfate and more-oxidized OOA formation were significantly sensitive to the increase of
ta, and their contribution were greatly enhanced at elevated ta levels. Our results suggested that photochemical aging process played a crucial role in the PM1 and O3 pollution in summertime.
Zhuohui Lin, Yonghong Wang, Feixue Zheng, Ying Zhou, Yishuo Guo, Zemin Feng, Chang Li, Yusheng Zhang, Simo Hakala, Tommy Chan, Chao Yan, Kaspar R. Daellenbach, Biwu Chu, Lubna Dada, Juha Kangasluoma, Lei Yao, Xiaolong Fan, Wei Du, Jing Cai, Runlong Cai, Tom V. Kokkonen, Putian Zhou, Lili Wang, Tuukka Petäjä, Federico Bianchi, Veli-Matti Kerminen, Yongchun Liu, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-223, https://doi.org/10.5194/acp-2020-223, 2020
Preprint under review for ACP
Jing Cai, Biwu Chu, Lei Yao, Chao Yan, Liine M. Heikkinen, Feixue Zheng, Chang Li, Xiaolong Fan, Shaojun Zhang, Daoyuan Yang, Yonghong Wang, Tom V. Kokkonen, Tommy Chan, Ying Zhou, Lubna Dada, Yongchun Liu, Hong He, Pauli Paasonen, Joni T. Kujansuu, Tuukka Petäjä, Claudia Mohr, Juha Kangasluoma, Federico Bianchi, Yele Sun, Philip L. Croteau, Douglas R. Worsnop, Veli-Matti Kerminen, Wei Du, Markku Kulmala, and Kaspar R. Daellenbach
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-248, https://doi.org/10.5194/acp-2020-248, 2020
Revised manuscript accepted for ACP
Short summary
Short summary
By applying both OA-PMF and Size-PMF at the same urban measurement site in Beijing, similar particle source-types, including vehicular emissions, cooking emissions and secondary formation-related sources were resolved by both frameworks and agreed well. It is also found that in the absence of new-particle formation, vehicular and cooking emissions dominate the particle number concentration while secondary particulate matter governed PM2.5 mass during spring and summer in Beijing.
Jingsha Xu, Shaojie Song, Roy M. Harrison, Congbo Song, Lianfang Wei, Qiang Zhang, Yele Sun, Lu Lei, Chao Zhang, Xiaohong Yao, Dihui Chen, Weijun Li, Miaomiao Wu, Hezhong Tian, Lining Luo, Shengrui Tong, Weiran Li, Junling Wang, Guoliang Shi, Yanqi Huangfu, Yingze Tian, Baozhu Ge, Shaoli Su, Chao Peng, Yang Chen, Fumo Yang, Aleksandra Mihajlidi-Zelić, Dragana Đorđević, Stefan J. Swift, Imogen Andrews, Jacqueline F. Hamilton, Ye Sun, Agung Kramawijaya, Jinxiu Han, Supattarachai Saksakulkrai, Clarissa Baldo, Siqi Hou, Feixue Zheng, Kaspar R. Daellenbach, Chao Yan, Yongchun Liu, Markku Kulmala, Pingqing Fu, and Zongbo Shi
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2020-156, https://doi.org/10.5194/amt-2020-156, 2020
Revised manuscript accepted for AMT
Short summary
Short summary
An inter-laboratory comparison exercise was conducted for the first time to examine the difference of water-soluble inorganic ions (WSII) measured by 10 labs using Ion Chromatography and by 2 online Aerosol Chemical Speciation Monitor method. Major ions including SO42−, NO3−, NH4+ agreed well in 10 IC labs, and correlated well with ACSM. WSII inter-lab variability strongly affected aerosol acidity results based on ion balance, but aerosol pH computed by ISORROPIA-II were very similar.
Yishuo Guo, Chao Yan, Chang Li, Zemin Feng, Ying Zhou, Zhuohui Lin, Lubna Dada, Dominik Stolzenburg, Rujing Yin, Jenni Kontkanen, Kaspar R. Daellenbach, Juha Kangasluoma, Lei Yao, Biwu Chu, Yonghong Wang, Runlong Cai, Federico Bianchi, Yongchun Liu, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2019-1111, https://doi.org/10.5194/acp-2019-1111, 2020
Preprint under review for ACP
Short summary
Short summary
Fog, cloud, haze are very common natural phenomena and all of them have a great impact on global climate. Sulfuric acid (SA) is one of the key compounds forming these suspended particles (aerosols), and therefore the concentration, source and sink of SA is very important. Daytime SA production is driven by OH radical oxiation, and here this article shows that ozonolysis of alkenes played a major role in nighttime SA formation in urabn Beijing under clean conditions.
Yongchun Liu, Yusheng Zhang, Chaofan Lian, Chao Yan, Zeming Feng, Feixue Zheng, Xiaolong Fan, Yan Chen, Weigang Wang, Biwu Chu, Yonghong Wang, Jin Cai, Wei Du, Kaspar R. Daellenbach, Juha Kangasluoma, Federico Bianchi, Joni Kujansuu, Tuukka Petäjä, Xuefei Wang, Bo Hu, Yuesi Wang, Maofa Ge, Hong He, and Markku Kulmala
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-150, https://doi.org/10.5194/acp-2020-150, 2020
Revised manuscript accepted for ACP
Short summary
Short summary
Understanding of the chemical/physical processes leading to atmospheric aerosol particle formation is crucial to devising effective mitigation strategies to protect the public and reduce uncertainties in climate predictions. We found that the photolysis of nitrous acid could promote the formation of organic and nitrate aerosol and traffic-related emission is the major contributor to ambient nitrous acid in haze days of wintertime in Beijing.
Biwu Chu, Yali Wang, Weiwei Yang, Jinzhu Ma, Qingxin Ma, Peng Zhang, Yongchun Liu, and Hong He
Atmos. Chem. Phys., 19, 14777–14790, https://doi.org/10.5194/acp-19-14777-2019, https://doi.org/10.5194/acp-19-14777-2019, 2019
Short summary
Short summary
This study found that the coexisting NO2 and/or C2H2 had significant influences on heterogeneous oxidation of SO2 due to the ubiquitous interactions between organic and inorganic species, and their effects were different under dark conditions or with UV irradiation. The experimental results of this study highlighted the requirement to consider the influence of coexisting organics and other inorganic gases in the heterogeneous oxidation kinetics of SO2.
Mingjin Tang, Chak K. Chan, Yong Jie Li, Hang Su, Qingxin Ma, Zhijun Wu, Guohua Zhang, Zhe Wang, Maofa Ge, Min Hu, Hong He, and Xinming Wang
Atmos. Chem. Phys., 19, 12631–12686, https://doi.org/10.5194/acp-19-12631-2019, https://doi.org/10.5194/acp-19-12631-2019, 2019
Short summary
Short summary
Hygroscopicity is one of the most important properties of aerosol particles, and a number of experimental techniques, which differ largely in principles, configurations and cost, have been developed to investigate hygroscopic properties of atmospherically relevant particles. Our paper provides a comprehensive and critical review of available techniques for aerosol hygroscopicity studies.
Tianzeng Chen, Yongchun Liu, Qingxin Ma, Biwu Chu, Peng Zhang, Changgeng Liu, Jun Liu, and Hong He
Atmos. Chem. Phys., 19, 8063–8081, https://doi.org/10.5194/acp-19-8063-2019, https://doi.org/10.5194/acp-19-8063-2019, 2019
Short summary
Short summary
Effects of SO2 and NH3 on SA formation from unburned gasoline vapor were investigated in a 30 m3 smog chamber. With the increase in SO2 and NH3 concentrations, formation of SA and each of its chemical species was promoted. Meanwhile, NPF and particle size growth were also significantly enhanced. This work indicates that gasoline evaporation emissions will be a significant source of SA and sulfur- and nitrogen-containing organics, especially in the presence of high concentrations of SO2 and NH3.
Changgeng Liu, Tianzeng Chen, Yongchun Liu, Jun Liu, Hong He, and Peng Zhang
Atmos. Chem. Phys., 19, 2687–2700, https://doi.org/10.5194/acp-19-2687-2019, https://doi.org/10.5194/acp-19-2687-2019, 2019
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The effect of SO2 at atmospheric levels on SOA formation and its oxidation state during 2-methoxyphenol photooxidation was investigated with various inorganic seed particles. The presence of SO2 increased SOA yield and oxidation state, suggesting that the functionalization reaction should be more dominant than the oligomerization reaction. SO2 and seed particles were found to have a synergetic contribution to SOA formation. The results demonstrate the important role of SO2 in SOA formation.
Mingjin Tang, Wenjun Gu, Qingxin Ma, Yong Jie Li, Cheng Zhong, Sheng Li, Xin Yin, Ru-Jin Huang, Hong He, and Xinming Wang
Atmos. Chem. Phys., 19, 2247–2258, https://doi.org/10.5194/acp-19-2247-2019, https://doi.org/10.5194/acp-19-2247-2019, 2019
Changgeng Liu, Yongchun Liu, Tianzeng Chen, Jun Liu, and Hong He
Atmos. Chem. Phys., 19, 2001–2013, https://doi.org/10.5194/acp-19-2001-2019, https://doi.org/10.5194/acp-19-2001-2019, 2019
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The rate constant and SOA formation for the OH-initiated reaction of eugenol were studied for the first time in an oxidation flow reactor. Significant SOA formation was observed, and SOA yield depended on precursor concentration and OH exposure. SO2 and NO2 both enhanced SOA yields. In addition, NO2 participated in OH-initiated reaction and produced organic nitrates. The results could be helpful for further understanding SOA formation from the atmospheric oxidation of methoxyphenols.
Yiqun Lu, Chao Yan, Yueyun Fu, Yan Chen, Yiliang Liu, Gan Yang, Yuwei Wang, Federico Bianchi, Biwu Chu, Ying Zhou, Rujing Yin, Rima Baalbaki, Olga Garmash, Chenjuan Deng, Weigang Wang, Yongchun Liu, Tuukka Petäjä, Veli-Matti Kerminen, Jingkun Jiang, Markku Kulmala, and Lin Wang
Atmos. Chem. Phys., 19, 1971–1983, https://doi.org/10.5194/acp-19-1971-2019, https://doi.org/10.5194/acp-19-1971-2019, 2019
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Gaseous sulfuric acid is one of the key precursors for atmospheric new particle formation processes, but its measurement remains challenging. This work develops an estimation method for the gaseous sulfuric acid concentration in an urban environment in China using multiple atmospheric variables that are easier to measure. The consideration of the heterogeneous formation of HONO and the subsequent photo-production of OH radicals improves the performance of the estimation method.
Biwu Chu, Xiao Zhang, Yongchun Liu, Hong He, Yele Sun, Jingkun Jiang, Junhua Li, and Jiming Hao
Atmos. Chem. Phys., 16, 14219–14230, https://doi.org/10.5194/acp-16-14219-2016, https://doi.org/10.5194/acp-16-14219-2016, 2016
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The interactive effects between inorganic and organic species under highly complex pollution conditions remain uncertain and were studied in a smog chamber. This study indicated that the synergistic formation of secondary inorganic and organic aerosol might increase the secondary aerosol load in the atmosphere and contribute haze pollution in eastern China. These synergistic effects were related to the heterogeneous process on aerosol surface and need to be considered in air quality models.
Y. Liu, Y. Ge, and H. He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2016-538, https://doi.org/10.5194/acp-2016-538, 2016
Revised manuscript not accepted
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It is unclear about the role of mineral dust in the atmospheric chemistry of amines. Uptake by kaolinite has been found as an innegligible sink of amines based on the measured kinetics in the temperature range of 232–300 K. It reveals that uptake by mineral dust should be considered in models simulating the chemical cycle of amines in the atmosphere in the future. The results will also aid in understanding the possible impacts of amines on human health, air quality, and climate effects.
Yaning Kang, Mingxu Liu, Yu Song, Xin Huang, Huan Yao, Xuhui Cai, Hongsheng Zhang, Ling Kang, Xuejun Liu, Xiaoyuan Yan, Hong He, Qiang Zhang, Min Shao, and Tong Zhu
Atmos. Chem. Phys., 16, 2043–2058, https://doi.org/10.5194/acp-16-2043-2016, https://doi.org/10.5194/acp-16-2043-2016, 2016
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The multi-year (1980–2012) comprehensive ammonia emissions inventories were compiled for China on 1 km × 1 km grid.
Various realistic parameters (ambient temperature, wind speed, soil acidity, synthetic fertilizer types, etc.) were considered in these inventories to synthetically refine the emission factors of ammonia volatilization according to local agricultural practice.
This paper shows the interannual trend and spatial distribution of ammonia emissions in details over recent decades.
Y. Liu, J. Liggio, R. Staebler, and S.-M. Li
Atmos. Chem. Phys., 15, 13569–13584, https://doi.org/10.5194/acp-15-13569-2015, https://doi.org/10.5194/acp-15-13569-2015, 2015
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This work for the first time demonstrated that organonitrogen compounds (NOC) can be formed efficiently via the uptake of ammonia by newly formed secondary organic aerosol using a smog chamber equipped with a HR-ToF-AMS. Based on the measured kinetics, this study suggests that light absorption by NOC in atmospheric particles may be important in regions where the BC contribution is minimal and NOC from ammonia should be considered with respect to overall deposition of nitrogen to ecosystems.
Y. Liu, L. Huang, S.-M. Li, T. Harner, and J. Liggio
Atmos. Chem. Phys., 14, 12195–12207, https://doi.org/10.5194/acp-14-12195-2014, https://doi.org/10.5194/acp-14-12195-2014, 2014
Related subject area
Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Molecular understanding of the suppression of new-particle formation by isoprene
Complex plant-derived organic aerosol as ice-nucleating particles – more than the sums of their parts?
Liquid–liquid phase separation and morphologies in organic particles consisting of α-pinene and β-caryophyllene ozonolysis products and mixtures with commercially available organic compounds
Oligomer and highly oxygenated organic molecule formation from oxidation of oxygenated monoterpenes emitted by California sage plants
Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels – Part 2: Chemical properties and characterization
Impact of NOx on secondary organic aerosol (SOA) formation from α-pinene and β-pinene photooxidation: the role of highly oxygenated organic nitrates
Evaluation of the chemical composition of gas- and particle-phase products of aromatic oxidation
Glyoxal's impact on dry ammonium salts: fast and reversible surface aerosol browning
Oxygenated products formed from OH-initiated reactions of trimethylbenzene: autoxidation and accretion
Chemical composition and light absorption of carbonaceous aerosols emitted from crop residue burning: Influence of combustion efficiency
Biomass-burning-derived particles from a wide variety of fuels – Part 2: Effects of photochemical aging on particle optical and chemical properties
Measured solid state and subcooled liquid vapour pressures of nitroaromatics using Knudsen effusion mass spectrometry
Polar semivolatile organic compounds in biomass-burning emissions and their chemical transformations during aging in an oxidation flow reactor
Temperature effects on optical properties and chemical composition of secondary organic aerosol derived from n-dodecane
An investigation on hygroscopic properties of 15 black carbon (BC)-containing particles from different carbon sources: roles of organic and inorganic components
Deconvolution of FIGAERO–CIMS thermal desorption profiles using positive matrix factorisation to identify chemical and physical processes during particle evaporation
Mineralogy and geochemistry of Asian dust: dependence on migration path, fractionation, and reactions with polluted air
Chemical composition, structures, and light absorption of N-containing aromatic compounds emitted from burning wood and charcoal in household cookstoves
Secondary Organic Aerosol Yields from the Oxidation of Benzyl Alcohol
Photochemical transformation of residential wood combustion emissions: dependence of organic aerosol composition on OH exposure
Hygroscopic behavior of aerosols generated from solutions of 3-methyl-1,2,3-butanetricarboxylic acid, its sodium salts, and its mixtures with NaCl
Seawater analysis by ambient mass-spectrometry-based seaomics
Distinct chemical and mineralogical composition of Icelandic dust compared to North African and Asian dust
Molecular composition and photochemical evolution of water-soluble organic carbon (WSOC) extracted from field biomass burning aerosols using high-resolution mass spectrometry
Heterogeneous oxidation of amorphous organic aerosol surrogates by O3, NO3, and OH at typical tropospheric temperatures
On mineral dust aerosol hygroscopicity
Direct contribution of ammonia to CCN-size alpha-pinene secondary organic aerosol formation
High levels of primary biogenic organic aerosols are driven by only a few plant-associated microbial taxa
Formation of highly oxygenated organic molecules from chlorine-atom-initiated oxidation of alpha-pinene
The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning
Technical note: Preparation and purification of atmospherically relevant α-hydroxynitrate esters of monoterpenes
Effect of inorganic-to-organic mass ratio on the heterogeneous OH reaction rates of erythritol: implications for atmospheric chemical stability of 2-methyltetrols
Ambient air quality in the Kathmandu Valley, Nepal, during the pre-monsoon: concentrations and sources of particulate matter and trace gases
Morphology and size of the particles emitted from a gasoline-direct-injection-engine vehicle and their ageing in an environmental chamber
A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements
The Aarhus Chamber Campaign on Highly Oxidized Multifunctional Organic Molecules and Aerosols (ACCHA): Particle Formation and Detailed Chemical Composition at Different Temperatures
Biomass-burning-derived particles from a wide variety of fuels – Part 1: Properties of primary particles
Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol
Cloud history can change water–ice–surface interactions of oxide mineral aerosols: a case study on silica
Kinetic modelling of formation and evaporation of SOA from NO3 oxidation of pure and mixed monoterpenes
Relationship between the molecular composition, visible light absorption, and health-related properties of smoldering woodsmoke aerosols
Impact of isolated atmospheric aging processes on the cloud condensation nuclei activation of soot particles
Secondary organic aerosol formation from OH-initiated oxidation of m-xylene: effects of relative humidity on yield and chemical composition
A study of volatility by composition, heating, and dilution measurements of secondary organic aerosol from 1,3,5-trimethylbenzene
Effects of NO2 and C3H6 on the heterogeneous oxidation of SO2 on TiO2 in the presence or absence of UV–Vis irradiation
Single-particle experiments measuring humidity and inorganic salt effects on gas-particle partitioning of butenedial
Gaseous, PM2.5 mass, and speciated emission factors from laboratory chamber peat combustion
Molecular characterization of polar organic aerosol constituents in off-road engine emissions using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS): implications for source apportionment
Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions
Chemical composition and hydrolysis of organic nitrate aerosol formed from hydroxyl and nitrate radical oxidation of α-pinene and β-pinene
Martin Heinritzi, Lubna Dada, Mario Simon, Dominik Stolzenburg, Andrea C. Wagner, Lukas Fischer, Lauri R. Ahonen, Stavros Amanatidis, Rima Baalbaki, Andrea Baccarini, Paulus S. Bauer, Bernhard Baumgartner, Federico Bianchi, Sophia Brilke, Dexian Chen, Randall Chiu, Antonio Dias, Josef Dommen, Jonathan Duplissy, Henning Finkenzeller, Carla Frege, Claudia Fuchs, Olga Garmash, Hamish Gordon, Manuel Granzin, Imad El Haddad, Xucheng He, Johanna Helm, Victoria Hofbauer, Christopher R. Hoyle, Juha Kangasluoma, Timo Keber, Changhyuk Kim, Andreas Kürten, Houssni Lamkaddam, Tiia M. Laurila, Janne Lampilahti, Chuan Ping Lee, Katrianne Lehtipalo, Markus Leiminger, Huajun Mai, Vladimir Makhmutov, Hanna Elina Manninen, Ruby Marten, Serge Mathot, Roy Lee Mauldin, Bernhard Mentler, Ugo Molteni, Tatjana Müller, Wei Nie, Tuomo Nieminen, Antti Onnela, Eva Partoll, Monica Passananti, Tuukka Petäjä, Joschka Pfeifer, Veronika Pospisilova, Lauriane L. J. Quéléver, Matti P. Rissanen, Clémence Rose, Siegfried Schobesberger, Wiebke Scholz, Kay Scholze, Mikko Sipilä, Gerhard Steiner, Yuri Stozhkov, Christian Tauber, Yee Jun Tham, Miguel Vazquez-Pufleau, Annele Virtanen, Alexander L. Vogel, Rainer Volkamer, Robert Wagner, Mingyi Wang, Lena Weitz, Daniela Wimmer, Mao Xiao, Chao Yan, Penglin Ye, Qiaozhi Zha, Xueqin Zhou, Antonio Amorim, Urs Baltensperger, Armin Hansel, Markku Kulmala, António Tomé, Paul M. Winkler, Douglas R. Worsnop, Neil M. Donahue, Jasper Kirkby, and Joachim Curtius
Atmos. Chem. Phys., 20, 11809–11821, https://doi.org/10.5194/acp-20-11809-2020, https://doi.org/10.5194/acp-20-11809-2020, 2020
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With experiments performed at CLOUD, we show how isoprene interferes in monoterpene oxidation via RO2 termination at atmospherically relevant concentrations. This interference shifts the distribution of highly oxygenated organic molecules (HOMs) away from C20 class dimers towards C15 class dimers, which subsequently reduces both biogenic nucleation and early growth rates. Our results may help to understand the absence of new-particle formation in isoprene-rich environments.
Isabelle Steinke, Naruki Hiranuma, Roger Funk, Kristina Höhler, Nadine Tüllmann, Nsikanabasi Silas Umo, Peter G. Weidler, Ottmar Möhler, and Thomas Leisner
Atmos. Chem. Phys., 20, 11387–11397, https://doi.org/10.5194/acp-20-11387-2020, https://doi.org/10.5194/acp-20-11387-2020, 2020
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In this study, we highlight the potential impact of particles from certain terrestrial sources on the formation of ice crystals in clouds. In particular, we focus on biogenic particles consisting of various organic compounds, which makes it very difficult to predict the ice nucleation properties of complex ambient particles. We find that these ambient particles are often more ice active than individual components.
Young-Chul Song, Ariana G. Bé, Scot T. Martin, Franz M. Geiger, Allan K. Bertram, Regan J. Thomson, and Mijung Song
Atmos. Chem. Phys., 20, 11263–11273, https://doi.org/10.5194/acp-20-11263-2020, https://doi.org/10.5194/acp-20-11263-2020, 2020
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We report the liquid–liquid phase separation (LLPS) of organic aerosol consisting of α-pinene- and β-caryophyllene-derived ozonolysis products and commercial organic compounds. As compositional complexity increased from one to two organic species, LLPS occurred over a wider range of average O : C values (increasing from 0.44 to 0.67). These results provide further evidence that LLPS is likely frequent in organic aerosol particles in the troposphere, even in the absence of inorganic salt.
Archit Mehra, Jordan E. Krechmer, Andrew Lambe, Chinmoy Sarkar, Leah Williams, Farzaneh Khalaj, Alex Guenther, John Jayne, Hugh Coe, Douglas Worsnop, Celia Faiola, and Manjula Canagaratna
Atmos. Chem. Phys., 20, 10953–10965, https://doi.org/10.5194/acp-20-10953-2020, https://doi.org/10.5194/acp-20-10953-2020, 2020
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Emissions of volatile organic compounds (VOCs) from plants are important for tropospheric ozone and secondary organic aerosol (SOA) formation. Real plant emissions are much more diverse than the few proxies widely used for studies of plant SOA. Here we present the first study of SOA from Californian sage plants and the oxygenated monoterpenes representing their major emissions. We identify SOA products and show the importance of the formation of highly oxygenated organic molecules and oligomers.
Damon M. Smith, Tianqu Cui, Marc N. Fiddler, Rudra P. Pokhrel, Jason D. Surratt, and Solomon Bililign
Atmos. Chem. Phys., 20, 10169–10191, https://doi.org/10.5194/acp-20-10169-2020, https://doi.org/10.5194/acp-20-10169-2020, 2020
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Biomass fuels used for domestic purposes in east Africa produce a significant atmospheric burden of aerosols and volatile organic compounds. The chemical properties and composition of these aerosols have not been investigated in the laboratory. In this work methanol extracts from filter samples of aerosol collected from an indoor smog chamber were analyzed to determine the chemical composition and identify the light absorption properties of organic aerosol constituents.
Iida Pullinen, Sebastian Schmitt, Sungah Kang, Mehrnaz Sarrafzadeh, Patrick Schlag, Stefanie Andres, Einhard Kleist, Thomas F. Mentel, Franz Rohrer, Monika Springer, Ralf Tillmann, Jürgen Wildt, Cheng Wu, Defeng Zhao, Andreas Wahner, and Astrid Kiendler-Scharr
Atmos. Chem. Phys., 20, 10125–10147, https://doi.org/10.5194/acp-20-10125-2020, https://doi.org/10.5194/acp-20-10125-2020, 2020
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Biogenic and anthropogenic air masses mix in the atmosphere, bringing plant-emitted monoterpenes and traffic-related nitrogen oxides together. There is debate whether the presence of nitrogen oxides reduces or increases secondary aerosol formation. This is important as secondary aerosols have cooling effects in the climate system but also constitute a health risk in populated areas. We show that the presence of NOx alone should not much affect the mass yields of secondary organic aerosols.
Archit Mehra, Yuwei Wang, Jordan E. Krechmer, Andrew Lambe, Francesca Majluf, Melissa A. Morris, Michael Priestley, Thomas J. Bannan, Daniel J. Bryant, Kelly L. Pereira, Jacqueline F. Hamilton, Andrew R. Rickard, Mike J. Newland, Harald Stark, Philip Croteau, John T. Jayne, Douglas R. Worsnop, Manjula R. Canagaratna, Lin Wang, and Hugh Coe
Atmos. Chem. Phys., 20, 9783–9803, https://doi.org/10.5194/acp-20-9783-2020, https://doi.org/10.5194/acp-20-9783-2020, 2020
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Aromatic volatile organic compounds (VOCs) emitted from anthropogenic activity are important for tropospheric ozone and secondary organic aerosol (SOA) formation. Here we present a detailed chemical characterisation of SOA from four C9-aromatic isomers and a polycyclic aromatic hydrocarbon (PAH). We identify and compare their oxidation products in the gas and particle phases, showing the different relative importance of oxidation pathways and proportions of highly oxygenated organic molecules.
David O. De Haan, Lelia N. Hawkins, Kevin Jansen, Hannah G. Welsh, Raunak Pednekar, Alexia de Loera, Natalie G. Jimenez, Margaret A. Tolbert, Mathieu Cazaunau, Aline Gratien, Antonin Bergé, Edouard Pangui, Paola Formenti, and Jean-François Doussin
Atmos. Chem. Phys., 20, 9581–9590, https://doi.org/10.5194/acp-20-9581-2020, https://doi.org/10.5194/acp-20-9581-2020, 2020
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When exposed to glyoxal in chamber experiments, dry ammonium or methylammonium sulfate particles turn brown immediately and reversibly without increasing in size. Much less browning was observed on wet aerosol particles, and no browning was observed with sodium sulfate aerosol. While estimated dry aerosol light absorption caused by background glyoxal (70 ppt) is insignificant compared to that of secondary brown carbon overall, in polluted regions this process could be a source of brown carbon.
Yuwei Wang, Archit Mehra, Jordan E. Krechmer, Gan Yang, Xiaoyu Hu, Yiqun Lu, Andrew Lambe, Manjula Canagaratna, Jianmin Chen, Douglas Worsnop, Hugh Coe, and Lin Wang
Atmos. Chem. Phys., 20, 9563–9579, https://doi.org/10.5194/acp-20-9563-2020, https://doi.org/10.5194/acp-20-9563-2020, 2020
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A series of OH-initiated oxidation experiments of trimethylbenzene were investigated in the absence and presence of NOx. Many C9 products with 1–11 oxygen atoms and C18 products presumably formed from dimerization of C9 peroxy radicals were observed, hinting at the extensive existence of autoxidation and accretion reaction pathways. The presence of NOx would suppress the formation of highly oxygenated C18 molecules and enhance the formation of organonitrates and even dinitrate compounds.
Yujue Wang, Min Hu, Nan Xu, Yanhong Qin, Zhijun Wu, Liwu Zeng, Xiaofeng Huang, and Lingyan He
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-676, https://doi.org/10.5194/acp-2020-676, 2020
Revised manuscript accepted for ACP
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Field straw residue burning is a widespread type of biomass burning in Asia, while its emissions are poorly understood. In this study, we designed lab-controlled experiments to comprehensively investigate the emission factors, chemical compositions and light absorption properties of both water-soluble and water-insoluble carbonaceous aerosols emitted from straw burning. The results clearly highlight the significant influences of burning conditions and combustion efficiency on the emissions.
Christopher D. Cappa, Christopher Y. Lim, David H. Hagan, Matthew Coggon, Abigail Koss, Kanako Sekimoto, Joost de Gouw, Timothy B. Onasch, Carsten Warneke, and Jesse H. Kroll
Atmos. Chem. Phys., 20, 8511–8532, https://doi.org/10.5194/acp-20-8511-2020, https://doi.org/10.5194/acp-20-8511-2020, 2020
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Smoke from combustion of a wide range of biomass fuels (e.g., leaves, twigs, logs, peat, and dung) was photochemically aged in a small chamber for up to 8 d of equivalent atmospheric aging. Upon aging, the particle chemical composition and ability to absorb sunlight changed owing to reactions in both the gas and particulate phases. We developed a model to explain the observations and used this to derive insights into the aging of smoke in the atmosphere.
Petroc D. Shelley, Thomas J. Bannan, Stephen D. Worrall, M. Rami Alfarra, Ulrich K. Krieger, Carl J. Percival, Arthur Garforth, and David Topping
Atmos. Chem. Phys., 20, 8293–8314, https://doi.org/10.5194/acp-20-8293-2020, https://doi.org/10.5194/acp-20-8293-2020, 2020
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The methods used to estimate the vapour pressures of compounds in the atmosphere typically perform poorly when applied to organic compounds found in the atmosphere. New measurements have been made and compared to previous experimental data and estimated values so that the limitations within the estimation methods can be identified and in the future be rectified.
Deep Sengupta, Vera Samburova, Chiranjivi Bhattarai, Adam C. Watts, Hans Moosmüller, and Andrey Y. Khlystov
Atmos. Chem. Phys., 20, 8227–8250, https://doi.org/10.5194/acp-20-8227-2020, https://doi.org/10.5194/acp-20-8227-2020, 2020
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This paper presents important results on the atmospheric chemistry of combustion emissions. Organic compounds from these emissions can contribute significantly to chemical and physical properties of atmospheric aerosols. In this paper, a detailed chemical analysis of gas- and particle-phase polar organic compounds from the laboratory combustion of globally important fuels is presented. The aging experiments were performed to understand the fate of biomass-burning organics in the atmosphere.
Junling Li, Weigang Wang, Kun Li, Wenyu Zhang, Chao Peng, Li Zhou, Bo Shi, Yan Chen, Mingyuan Liu, Hong Li, and Maofa Ge
Atmos. Chem. Phys., 20, 8123–8137, https://doi.org/10.5194/acp-20-8123-2020, https://doi.org/10.5194/acp-20-8123-2020, 2020
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Long-chain alkanes (a large fraction of diesel fuel and its exhaust) are important potential contributors of SOA. Through the analysis of the components of formed SOA, we found that low-temperature conditions promote the oligomerization of n-dodecane, and the degree of oligomerization can reach tetramerization. The presence of the oligomers enhances the light extinction of the particles. UV-scattering particles in the boundary layer can accelerate photochemical reactions and haze production.
Minli Wang, Yiqun Chen, Heyun Fu, Xiaolei Qu, Bengang Li, Shu Tao, and Dongqiang Zhu
Atmos. Chem. Phys., 20, 7941–7954, https://doi.org/10.5194/acp-20-7941-2020, https://doi.org/10.5194/acp-20-7941-2020, 2020
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The mechanism and factors controlling the hygroscopicity of black-carbon-containing particles (BCPs) from different carbon sources are not well understood. We thoroughly characterized the chemical and compositional properties of 15 samples of BCPs from different sources (wood, herb, and soot) and further investigated their hygroscopicity. Depending on the carbon source, organic carbon and dissolved mineral contents were key determinants of the equilibrium and kinetics of water uptake by BCPs.
Angela Buchholz, Arttu Ylisirniö, Wei Huang, Claudia Mohr, Manjula Canagaratna, Douglas R. Worsnop, Siegfried Schobesberger, and Annele Virtanen
Atmos. Chem. Phys., 20, 7693–7716, https://doi.org/10.5194/acp-20-7693-2020, https://doi.org/10.5194/acp-20-7693-2020, 2020
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To understand the role of aerosol particles in the atmosphere, it is necessary to know their detailed chemical composition and physical properties, especially volatility. The thermal desorption data from FIGAERO–CIMS provides both but are difficult to analyse. With positive matrix factorisation, we can separate instrument background from the real signal. Compounds can be classified by their apparent volatility, and the contribution of thermal decomposition in the instrument can be identified.
Gi Young Jeong
Atmos. Chem. Phys., 20, 7411–7428, https://doi.org/10.5194/acp-20-7411-2020, https://doi.org/10.5194/acp-20-7411-2020, 2020
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During long-range transport, mineral dust interacts with the atmosphere, biosphere, cryosphere, and pedosphere, influencing ecosystems, the atmospheric energy balance, and air quality. This study analyzed the mineral and chemical compositions of Asian dust samples collected during 14 years in Korea. The result showed mineralogical and geochemical variation depending on the dust migration path, fractionation, and atmospheric reactions as well as average properties.
Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xie Chen, Guofeng Shen, James J. Jetter, and Qin'geng Wang
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-594, https://doi.org/10.5194/acp-2020-594, 2020
Revised manuscript accepted for ACP
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This study investigated the composition, structures, and light absorption of N-containing aromatic compounds (NACs) in PM2.5 emitted from burning red oak and charcoal in a variety of cookstoves. The results suggest that the identified NACs might have substantial fractions remaining in the gas-phase. In comparison to other sources, cookstove emissions from red oak or charcoal fuels did not exhibit unique NAC structural features, but had distinct NACs composition.
Sophia M. Charan, Reina S. Buenconsejo, and John H. Seinfeld
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-492, https://doi.org/10.5194/acp-2020-492, 2020
Revised manuscript accepted for ACP
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In urban areas, the emissions from volatile chemical products may be responsible for the formation of as much particulate matter as motor vehicles. Since exposure to particulate matter is a public health crisis, understanding its formation is critical. In this work we investigate the secondary organic aerosol formation potential of benzyl alcohol, an important compound that is representative of some of these new emission sources, and find that more particulate matter forms than is expected.
Anni Hartikainen, Petri Tiitta, Mika Ihalainen, Pasi Yli-Pirilä, Jürgen Orasche, Hendryk Czech, Miika Kortelainen, Heikki Lamberg, Heikki Suhonen, Hanna Koponen, Liqing Hao, Ralf Zimmermann, Jorma Jokiniemi, Jarkko Tissari, and Olli Sippula
Atmos. Chem. Phys., 20, 6357–6378, https://doi.org/10.5194/acp-20-6357-2020, https://doi.org/10.5194/acp-20-6357-2020, 2020
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Residential wood combustion emits large amounts of organic compounds, which are transformed in the atmosphere via photochemical ageing reactions. We assessed this organic emission at various stages of exposure with an oxidation flow reactor. Ageing led to major changes in both gaseous and particulate phases including increased acidic compounds and transformation of the polycyclic aromatic compounds. Such changes have serious implications for the health- and climate-related effects of combustion.
Li Wu, Clara Becote, Sophie Sobanska, Pierre-Marie Flaud, Emilie Perraudin, Eric Villenave, Young-Chul Song, and Chul-Un Ro
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-428, https://doi.org/10.5194/acp-2020-428, 2020
Revised manuscript accepted for ACP
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3-methyl-1,2,3-butanetricarboxylic acid (MBTCA), a second-generation product of monoterpenes, is one of the most relevant tracer compounds for biogenic SOAs. Laboratory-generated, micrometer-sized, pure MBTCA, mono-/di-/tri-sodium MBTCA salts, and MBTCA-NaCl mixture aerosol particles were examined systematically to observe their hygroscopic behavior and it was also observed that the monosodium MBTCA salt aerosols were formed through a reaction between MBTCA and NaCl.
Nicolás Zabalegui, Malena Manzi, Antoine Depoorter, Nathalie Hayeck, Marie Roveretto, Chunlin Li, Manuela van Pinxteren, Hartmut Herrmann, Christian George, and María Eugenia Monge
Atmos. Chem. Phys., 20, 6243–6257, https://doi.org/10.5194/acp-20-6243-2020, https://doi.org/10.5194/acp-20-6243-2020, 2020
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A new approach to bridging different fields of science by studying the air–sea interface is described. An untargeted ambient mass-spectrometry-based metabolomics method enables the study of enriched organic compounds found on the sea surface for air–water transfer processes. Results from the metabolomics experiments and a lab-to-field approach provide new opportunities for characterizing the seawater organic-matter content and discovering compounds involved in aerosol-formation processes.
Clarissa Baldo, Paola Formenti, Sophie Nowak, Servanne Chevaillier, Mathieu Cazaunau, Edouard Pangui, Claudia Di Biagio, Jean-Francois Doussin, Konstantin Ignatyev, Pavla Dagsson Waldhauserova, Olafur Arnalds, A. Robert MacKenzie, and Zongbo Shi
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-437, https://doi.org/10.5194/acp-2020-437, 2020
Revised manuscript accepted for ACP
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We showed that Icelandic dust has a fundamentally different chemical and mineralogical composition from low latitude dust. In particular, magnetite is as high as 1–2 % of the total dust mass. Our results suggest that Icelandic dust may have an important impact on the radiation balance in the sub-polar and polar regions.
Jing Cai, Xiangying Zeng, Guorui Zhi, Sasho Gligorovski, Guoying Sheng, Zhiqiang Yu, Xinming Wang, and Ping'an Peng
Atmos. Chem. Phys., 20, 6115–6128, https://doi.org/10.5194/acp-20-6115-2020, https://doi.org/10.5194/acp-20-6115-2020, 2020
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The composition and light-induced evolution of a water-soluble organic carbon mixture from fresh biomass burning aerosols was investigated with direct infusion electrospray ionisation high-resolution mass spectrometry (HRMS) and liquid chromatography coupled with HRMS. Our findings indicate that the water-soluble organic fraction of combustion-derived aerosols has the potential to form more oxidised organic matter, contributing to the highly oxygenated nature of atmospheric organic aerosols.
Jienan Li, Seanna M. Forrester, and Daniel A. Knopf
Atmos. Chem. Phys., 20, 6055–6080, https://doi.org/10.5194/acp-20-6055-2020, https://doi.org/10.5194/acp-20-6055-2020, 2020
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Organic aerosol is ubiquitous in the atmosphere and can change its phase state from liquid to solid in response to temperature. Our laboratory measurements demonstrate that the chemical reactivity of typical organic aerosol species with atmospheric oxidants is modulated by the species’ phase state. We find that under temperatures typical of the middle and upper troposphere the chemical lifetime of organic aerosol can be significantly extended due to the reduced reactive uptake of gas oxidants.
Lanxiadi Chen, Chao Peng, Athanasios Nenes, Wenjun Gu, Hanjing Fu, Xing Jian, Huanhuan Zhang, Guohua Zhang, Jianxi Zhu, Xinming Wang, and Mingjin Tang
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-442, https://doi.org/10.5194/acp-2020-442, 2020
Revised manuscript accepted for ACP
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We investigated hygroscopic properties of a number of mineral dust particles in a quantitative manner, via measuring the sample mass at different relative humidities. The robust and comprehensive data obtained would significantly improve our knowledge of hygroscopicity of mineral dust and its impacts on atmospheric chemistry and climate.
Liqing Hao, Eetu Kari, Ari Leskinen, Douglas R. Worsnop, and Annele Virtanen
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-457, https://doi.org/10.5194/acp-2020-457, 2020
Revised manuscript accepted for ACP
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Our work presents secondary organic aerosol (SOA) formation results in the presence of gaseous ammonia. The particle phase ammonium was continuously produced even after SOA formation has ceased. The gas phase organic acids were experimentally observed to contribute to the formed particle phase ammonium salts. This study suggests that the presence of ammonia may change the mass and chemical composition of large-size SOA particles and can potentially alter the aerosol impact on climate change.
Abdoulaye Samaké, Aurélie Bonin, Jean-Luc Jaffrezo, Pierre Taberlet, Samuël Weber, Gaëlle Uzu, Véronique Jacob, Sébastien Conil, and Jean M. F. Martins
Atmos. Chem. Phys., 20, 5609–5628, https://doi.org/10.5194/acp-20-5609-2020, https://doi.org/10.5194/acp-20-5609-2020, 2020
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Despite being a major source of coarse organic matter, primary biogenic organic aerosols (PBOAs) remain poorly implemented in source-resolved chemical transport models. This study, based on an intensive field sampling of aerosols, combined physicochemical characterizations of PM10 with DNA high-throughput sequencing to provide a comprehensive understanding of the microbial fingerprints associated with primary sugar compounds (tracers of PBOAs) and their main surrounding environmental sources.
Yonghong Wang, Matthieu Riva, Hongbin Xie, Liine Heikkinen, Simon Schallhart, Qiaozhi Zha, Chao Yan, Xu-Cheng He, Otso Peräkylä, and Mikael Ehn
Atmos. Chem. Phys., 20, 5145–5155, https://doi.org/10.5194/acp-20-5145-2020, https://doi.org/10.5194/acp-20-5145-2020, 2020
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Chamber experiments were conducted with alpha-pinene and chlorine under low- and high-nitrogen-oxide (NOX) conditions. We estimated the HOM yields from chlorine-initiated oxidation of alpha-pinene under low-NOX conditions to be around 1.8 %, though with a uncertainty range (0.8 %–4 %) due to lack of suitable calibration methods. Our study clearly demonstrates that the chlorine-atom-initiated oxidation of alpha-pinene can produce low-volatility organic compounds.
Xingjun Fan, Tao Cao, Xufang Yu, Yan Wang, Xin Xiao, Feiyue Li, Yue Xie, Wenchao Ji, Jianzhong Song, and Ping'an Peng
Atmos. Chem. Phys., 20, 4593–4605, https://doi.org/10.5194/acp-20-4593-2020, https://doi.org/10.5194/acp-20-4593-2020, 2020
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A particle-phase O3 oxidation of biomass burning (BB) smoke particles was conducted to investigate the evolution of brown carbon (BrC) therein. The O3 aging induced the decomposition of chromophores and fluorophores. EEM–PARAFAC showed a predominant decomposition of protein-like substances and a gradual increase proportion of humic-like substances for BB BrC during O3 aging. The dynamic spectral behavior of chromophores and functional groups within BrC was further explored by 2D-COS.
Elena Ali McKnight, Nicole P. Kretekos, Demi Owusu, and Rebecca Lyn LaLonde
Atmos. Chem. Phys., 20, 4241–4254, https://doi.org/10.5194/acp-20-4241-2020, https://doi.org/10.5194/acp-20-4241-2020, 2020
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This report describes a simple, safe and effective method to prepare nitrate esters of terpenes (carene, limonene, perillic alcohol, beta-pinene and alpha-pinene) which are key oxidation products in the atmosphere. These compounds are implicated in the formation of secondary organic aerosols. A compilation of the relevant spectroscopic data has been presented. The availability of these compounds and their characterization data will enable further study of the structure–reactivity relationships.
Rongshuang Xu, Hoi Ki Lam, Kevin R. Wilson, James F. Davies, Mijung Song, Wentao Li, Ying-Lung Steve Tse, and Man Nin Chan
Atmos. Chem. Phys., 20, 3879–3893, https://doi.org/10.5194/acp-20-3879-2020, https://doi.org/10.5194/acp-20-3879-2020, 2020
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Atmospheric particles, a complex mixture of inorganic salts, organic compounds and water, can continually undergo heterogeneous oxidation initiated by gas-phase oxidants at the particle surface. We found that ammonium sulfate can decelerate the rate of heterogeneous OH reaction with 2-methyltetrols when the inorganic-to-organic mass ratio increases. These results would suggest 2-methyltetrols are likely chemically stable against heterogeneous OH oxidation in the atmosphere.
Md. Robiul Islam, Thilina Jayarathne, Isobel J. Simpson, Benjamin Werden, John Maben, Ashley Gilbert, Puppala S. Praveen, Sagar Adhikari, Arnico K. Panday, Maheswar Rupakheti, Donald R. Blake, Robert J. Yokelson, Peter F. DeCarlo, William C. Keene, and Elizabeth A. Stone
Atmos. Chem. Phys., 20, 2927–2951, https://doi.org/10.5194/acp-20-2927-2020, https://doi.org/10.5194/acp-20-2927-2020, 2020
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The Kathmandu Valley experiences high levels of air pollution. In this study, atmospheric gases and particulate matter were characterized by online and off-line measurements, with an emphasis on understanding their sources. The major sources of particulate matter and trace gases were identified as garbage burning, biomass burning, and vehicles. The majority of secondary organic aerosol was attributed to anthropogenic precursors, while a minority was attributed to biogenic gases.
Jiaoping Xing, Longyi Shao, Wenbin Zhang, Jianfei Peng, Wenhua Wang, Shijin Shuai, Min Hu, and Daizhou Zhang
Atmos. Chem. Phys., 20, 2781–2794, https://doi.org/10.5194/acp-20-2781-2020, https://doi.org/10.5194/acp-20-2781-2020, 2020
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Our results highlight the contribution of gasoline-direct-injection (GDI) vehicles to aerosols, both primary and secondary. The major particles from GDI vehicles are organic and soot particles; they actively participate in chemical conversions in the atmosphere, leading to morphology and composition changes in hours. Rapid ageing could be attributable to the acid-catalysed mechanism and high concentrations of gaseous pollutants. These results would be beneficial for control of PM2.5 pollution.
Ziyue Li, Emma L. D'Ambro, Siegfried Schobesberger, Cassandra J. Gaston, Felipe D. Lopez-Hilfiker, Jiumeng Liu, John E. Shilling, Joel A. Thornton, and Christopher D. Cappa
Atmos. Chem. Phys., 20, 2489–2512, https://doi.org/10.5194/acp-20-2489-2020, https://doi.org/10.5194/acp-20-2489-2020, 2020
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We discuss the development and application of a robust clustering method for the interpretation of compound-specific organic aerosol thermal desorption profiles. We demonstrate the utility of clustering for analysis and interpretation of the composition and volatility of secondary organic aerosol. We show that the thermal desorption profiles are represented by only 9–13 distinct clusters, with the number of clusters obtained dependent on the precursor and formation conditions.
Kasper Kristensen, Louise N. Jensen, Lauriane L. J. Quéléver, Sigurd Christiansen, Bernadette Rosati, Jonas Elm, Ricky Teiwes, Henrik B. Pedersen, Marianne Glasius, Mikael Ehn, and Merete Bilde
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-99, https://doi.org/10.5194/acp-2020-99, 2020
Revised manuscript accepted for ACP
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Atmospheric particles are important in relation to human health and the global climate. As the global temperature changes, so may the atmospheric chemistry controlling the formation of particles formed from the reactions of natural emitted volatile organic compounds (VOCs). In the current work, we show how temperatures influence the formation and chemical composition of atmospheric particles from α-pinene; a biogenic VOC largely emitted in high-latitude environments such as the boreal forests.
Crystal D. McClure, Christopher Y. Lim, David H. Hagan, Jesse H. Kroll, and Christopher D. Cappa
Atmos. Chem. Phys., 20, 1531–1547, https://doi.org/10.5194/acp-20-1531-2020, https://doi.org/10.5194/acp-20-1531-2020, 2020
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We characterized various optical, chemical, and physical properties of particles produced from combustion of a variety of different biomass fuels, many representative of those found in the western US. We find that many properties scale with the ratio between bulk average organic aerosol and black carbon mass concentrations, although there are some properties that do not.
Lauren T. Fleming, Peng Lin, James M. Roberts, Vanessa Selimovic, Robert Yokelson, Julia Laskin, Alexander Laskin, and Sergey A. Nizkorodov
Atmos. Chem. Phys., 20, 1105–1129, https://doi.org/10.5194/acp-20-1105-2020, https://doi.org/10.5194/acp-20-1105-2020, 2020
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We have explored the nature and stability of molecules that give biomass burning smoke its faint brown color. Different types of biomass fuels were burned and the resulting smoke was collected for a detailed chemical analysis. We found that brown molecules in smoke become less colored when they are irradiated by sunlight, but this photobleaching process is very slow. This means that biomass burning smoke will remain brown-colored for a long time and efficiently warm up the atmosphere.
Ahmed Abdelmonem, Sanduni Ratnayake, Jonathan D. Toner, and Johannes Lützenkirchen
Atmos. Chem. Phys., 20, 1075–1087, https://doi.org/10.5194/acp-20-1075-2020, https://doi.org/10.5194/acp-20-1075-2020, 2020
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We address, on the molecular level, the potential for, and consequences of, surface property variations in aerosol particles in the atmosphere. Aerosol surface aging changes the interfacial chemistry, giving rise to marked variations in the ice nucleation ability of the surface. This study provides new insights into atmospheric processes, particularly cloud formation and aerosol aging in the atmosphere, with potential implications for the pharmaceutical and food industries.
Thomas Berkemeier, Masayuki Takeuchi, Gamze Eris, and Nga L. Ng
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-55, https://doi.org/10.5194/acp-2020-55, 2020
Revised manuscript accepted for ACP
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This manuscript presents how environmental chamber data of secondary organic aerosol (SOA) formation can be interpreted using kinetic modelling techniques. Utilizing pure and mixed precursor experiments, we show that SOA formation and evaporation can be understood by explicitly treating gas-phase chemistry, gas-particle partitioning and, notably, particle-phase oligomerization, but some of the non-linear, non-equilibrium effects must be accredited to diffusion limitations in the particle phase.
Lam Kam Chan, Khanh Q. Nguyen, Noreen Karim, Yatian Yang, Robert H. Rice, Guochun He, Michael S. Denison, and Tran B. Nguyen
Atmos. Chem. Phys., 20, 539–559, https://doi.org/10.5194/acp-20-539-2020, https://doi.org/10.5194/acp-20-539-2020, 2020
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Aerosols from the low-intensity smoldering combustion of nine types of wood were generated in a controlled laboratory environment and subjected to chemical, physical, and biological and toxicological analysis. These smoldering woodsmoke aerosols have significant biological activity that is comparable to other combustion-derived sources. We describe the molecular composition of the woodsmoke aerosols and find links between specific compounds and aerosol optical–biological properties.
Franz Friebel, Prem Lobo, David Neubauer, Ulrike Lohmann, Saskia Drossaart van Dusseldorp, Evelyn Mühlhofer, and Amewu A. Mensah
Atmos. Chem. Phys., 19, 15545–15567, https://doi.org/10.5194/acp-19-15545-2019, https://doi.org/10.5194/acp-19-15545-2019, 2019
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We investigated the change in cloud droplet activity of size-selected soot particles after being exposed to atmospheric levels of ozone over the course of 12 h. For this, we operated a 3 m3 aerosol chamber in continuous-flow mode. The results were fed into a climate model (ECHAM-HAM). We found that the oxidation of soot particles with ozone is a significant source of cloud condensation nuclei in the atmosphere.
Qun Zhang, Yongfu Xu, and Long Jia
Atmos. Chem. Phys., 19, 15007–15021, https://doi.org/10.5194/acp-19-15007-2019, https://doi.org/10.5194/acp-19-15007-2019, 2019
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The negative effects of relative humidity (RH) on secondary organic aerosol (SOA) formation from m-xylene under low NOx conditions were observed. The mechanisms of the RH effects of SOA yields have been sufficiently discussed. The decrease of SOA formation at high RH may be mainly attributed to the suppression of oligomers and the further particle-phase reaction of highly oxygenated organic molecules. The faster wall loss of SOA precursors at higher RH may also influence the SOA yield.
Kei Sato, Yuji Fujitani, Satoshi Inomata, Yu Morino, Kiyoshi Tanabe, Toshihide Hikida, Akio Shimono, Akinori Takami, Akihiro Fushimi, Yoshinori Kondo, Takashi Imamura, Hiroshi Tanimoto, and Seiji Sugata
Atmos. Chem. Phys., 19, 14901–14915, https://doi.org/10.5194/acp-19-14901-2019, https://doi.org/10.5194/acp-19-14901-2019, 2019
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The volatility distributions of secondary organic aerosol (SOA) formed from the photooxidation of 1,3,5-trimethylbenzene were investigated by composition, heating, and dilution measurements. Fresh SOA, formed from 1,3,5-trimethylbenzene, included low-volatility compounds with < 1 μg m–3 saturation concentrations, which are not assumed to exist in fresh SOA particles in the standard volatility basis-set approach. Improvements in the organic aerosol model will be necessary.
Biwu Chu, Yali Wang, Weiwei Yang, Jinzhu Ma, Qingxin Ma, Peng Zhang, Yongchun Liu, and Hong He
Atmos. Chem. Phys., 19, 14777–14790, https://doi.org/10.5194/acp-19-14777-2019, https://doi.org/10.5194/acp-19-14777-2019, 2019
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This study found that the coexisting NO2 and/or C2H2 had significant influences on heterogeneous oxidation of SO2 due to the ubiquitous interactions between organic and inorganic species, and their effects were different under dark conditions or with UV irradiation. The experimental results of this study highlighted the requirement to consider the influence of coexisting organics and other inorganic gases in the heterogeneous oxidation kinetics of SO2.
Adam W. Birdsall, Jack C. Hensley, Paige S. Kotowitz, Andrew J. Huisman, and Frank N. Keutsch
Atmos. Chem. Phys., 19, 14195–14209, https://doi.org/10.5194/acp-19-14195-2019, https://doi.org/10.5194/acp-19-14195-2019, 2019
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We have measured the evaporation rates of butenedial, a four-carbon dialdehyde produced in the atmosphere, from individual levitated particles. Effective vapor pressures and Henry's law constants, which characterize the compound's gas-particle partitioning behavior, were determined. The important role of hydration reactions was observed under both dry and humid conditions, as well as a salting-out effect in the presence of sodium chloride or sodium sulfate.
John G. Watson, Junji Cao, L.-W. Antony Chen, Qiyuan Wang, Jie Tian, Xiaoliang Wang, Steven Gronstal, Steven Sai Hang Ho, Adam C. Watts, and Judith C. Chow
Atmos. Chem. Phys., 19, 14173–14193, https://doi.org/10.5194/acp-19-14173-2019, https://doi.org/10.5194/acp-19-14173-2019, 2019
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Although peat burning is a common global emission source, region-specific emission factors are lacking. This work fills that gap for six peat-bearing regions. It is also shown through simulated aging with an oxidation flow reactor that potential aerosol mass changes during transport.
Min Cui, Cheng Li, Yingjun Chen, Fan Zhang, Jun Li, Bin Jiang, Yangzhi Mo, Jia Li, Caiqing Yan, Mei Zheng, Zhiyong Xie, Gan Zhang, and Junyu Zheng
Atmos. Chem. Phys., 19, 13945–13956, https://doi.org/10.5194/acp-19-13945-2019, https://doi.org/10.5194/acp-19-13945-2019, 2019
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Refined source apportionment is urgently needed but hard to achieve due to a lack of specific biomarkers. Recently, Fourier transform ion cyclotron resonance mass spectrometry has been used to analyse the probable chemical structure of polar organic matter emitted from off-road engines. We found more condensed aromatic rings in S-containing compounds for HFO-fueled vessels, while more abundant aliphatic chains were observed in emissions from diesel equipment.
Christopher Y. Lim, David H. Hagan, Matthew M. Coggon, Abigail R. Koss, Kanako Sekimoto, Joost de Gouw, Carsten Warneke, Christopher D. Cappa, and Jesse H. Kroll
Atmos. Chem. Phys., 19, 12797–12809, https://doi.org/10.5194/acp-19-12797-2019, https://doi.org/10.5194/acp-19-12797-2019, 2019
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Wildfires are a large source of gases and particles to the atmosphere, both of which impact human health and climate. The amount and composition of particles from wildfires can change with time in the atmosphere; however, the impact of aging is not well understood. In a series of controlled laboratory experiments, we show that the particles are oxidized and a significant fraction of the gas-phase carbon (24 %–56 %) is converted to particle mass over the course of several days in the atmosphere.
Masayuki Takeuchi and Nga L. Ng
Atmos. Chem. Phys., 19, 12749–12766, https://doi.org/10.5194/acp-19-12749-2019, https://doi.org/10.5194/acp-19-12749-2019, 2019
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Organic nitrate is ubiquitous in the atmosphere and impacts the formation of aerosol and ozone, two leading air pollutants of concern worldwide. We conducted a comprehensive laboratory study to investigate the hydrolysis process of organic nitrate aerosol formed from monoterpenes, which are important reactive chemicals emitted by plants. Our results provide experimentally constrained parameters required to assess the role of organic nitrate in the formation of the air pollutants of our concern.
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Short summary
During production and use of carbon nanomaterials, they are prone to enter the environment and ultimately the human body, and subsequently to pose a risk of adverse health effects. This work has for the first time found that epoxide is highly active to form ROS, possibly leading to a strong oxidation stress to humans, while carboxylation and hydroxylation have little influence on the oxidation potential. This suggests that more attention should be paid to epoxide-containing carbon nanomaterials.
During production and use of carbon nanomaterials, they are prone to enter the environment and...
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