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ACP | Articles | Volume 20, issue 16
Atmos. Chem. Phys., 20, 9997–10014, 2020
https://doi.org/10.5194/acp-20-9997-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-9997-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 20, 9997–10014, 2020
https://doi.org/10.5194/acp-20-9997-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-9997-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article 27 Aug 2020
Research article | 27 Aug 2020
Polycyclic aromatic hydrocarbons (PAHs) and oxy- and nitro-PAHs in ambient air of the Arctic town Longyearbyen, Svalbard
Tatiana Drotikova et al.
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No articles found.
Laura Röhler, Martin Schlabach, Peter Haglund, Knut Breivik, Roland Kallenborn, and Pernilla Bohlin-Nizzetto
Atmos. Chem. Phys., 20, 9031–9049, https://doi.org/10.5194/acp-20-9031-2020, https://doi.org/10.5194/acp-20-9031-2020, 2020
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A new clean-up method for the SUS and NTS of organic contaminants was applied to high-volume Arctic air samples. A large number of known and new potential organic chemicals of emerging Arctic concern were identified and prioritised with GC×GC-LRMS; 60 % of the identified contaminants (not yet detected in Arctic samples) do not meet currently accepted criteria for LRATP into polar environments. Without our empirical confirmation, they would not be considered potential Arctic contaminants.
Laura Röhler, Pernilla Bohlin-Nizzetto, Pawel Rostkowski, Roland Kallenborn, and Martin Schlabach
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-263, https://doi.org/10.5194/acp-2020-263, 2020
Preprint under review for ACP
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A novel non-destructive, sulphuric acid free clean-up method of high-volume air samples was developed and evaluated with organic chemicals, covering a wide range of polarities (logP 2-11). This method, providing quantitative results of comparable quality to traditional methods, was combined with newly developed data treatment strategies for simultaneous suspect and non-target screening. The application on air samples from southern Norway revealed 90 new potential chemicals of emerging concern.
Henrik Grythe, Susana Lopez-Aparicio, Matthias Vogt, Dam Vo Thanh, Claudia Hak, Anne Karine Halse, Paul Hamer, and Gabriela Sousa Santos
Atmos. Chem. Phys., 19, 10217–10237, https://doi.org/10.5194/acp-19-10217-2019, https://doi.org/10.5194/acp-19-10217-2019, 2019
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Emissions from residential wood combustion are a major contributor to human exposure to air pollution. In this study, we develop a highly detailed and scalable emission inventory for Norway applicable also to local air quality studies. Emissions are based on novel highly detailed input data that offer unprecedented spatial (and temporal) resolution. We also show that the emissions presented improve model accuracy and we highlight that the principles are applicable in other sectors and countries.
Related subject area
Subject: Gases | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Assessing contributions of natural surface and anthropogenic emissions to atmospheric mercury in a fast-developing region of eastern China from 2015 to 2018
Measurements of carbonyl compounds around the Arabian Peninsula: overview and model comparison
Retrieving tropospheric NO2 vertical column densities around the city of Beijing and estimating NOx emissions based on car MAX-DOAS measurements
Measurement report: Statistical modelling of long-term trends of atmospheric inorganic gaseous species within proximity of the pollution hotspot in South Africa
Global-scale distribution of ozone in the remote troposphere from the ATom and HIPPO airborne field missions
Atmospheric mercury in the Southern Hemisphere – Part 2: Source apportionment analysis at Cape Point station, South Africa
Source characterization of volatile organic compounds measured by proton-transfer-reaction time-of-flight mass spectrometers in Delhi, India
Scattered coal is the largest source of ambient volatile organic compounds during the heating season in Beijing
Non-target and suspect characterisation of organic contaminants in Arctic air – Part 2: Application of a new tool for identification and prioritisation of chemicals of emerging Arctic concern in air
Measurements of traffic-dominated pollutant emissions in a Chinese megacity
Reviewing global estimates of surface reactive nitrogen concentration and deposition using satellite retrievals
Atmospheric reactivity and oxidation capacity during summer at a suburban site between Beijing and Tianjin
Source apportionment of atmospheric mercury in the remote marine atmosphere: Mace Head GAW station, Irish western coast
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017
Megacity and local contributions to regional air pollution: an aircraft case study over London
Characteristics, sources, and reactions of nitrous acid during winter at an urban site in the Central Plains Economic Region in China
Volatile organic compounds and ozone air pollution in an oil production region in northern China
MAX-DOAS measurements of NO2, SO2, HCHO, and BrO at the Mt. Waliguan WMO GAW global baseline station in the Tibetan Plateau
Sesquiterpenes dominate monoterpenes in northern wetland emissions
Net ozone production and its relationship to nitrogen oxides and volatile organic compounds in the marine boundary layer around the Arabian Peninsula
Significant production of ClNO2 and possible source of Cl2 from N2O5 uptake at a suburban site in eastern China
A new marine biogenic emission: methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea
Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of North China Plain: insights from the Mount Tai Observatory
Insights into atmospheric oxidation processes by performing factor analyses on subranges of mass spectra
O2 : CO2 exchange ratio for net turbulent flux observed in an urban area of Tokyo, Japan, and its application to an evaluation of anthropogenic CO2 emissions
Dynamic projection of anthropogenic emissions in China: methodology and 2015–2050 emission pathways under a range of socio-economic, climate policy, and pollution control scenarios
Partitioning of hydrogen peroxide in gas-liquid and gas-aerosol phases
Contribution of nitrous acid to the atmospheric oxidation capacity in an industrial zone in the Yangtze River Delta region of China
Origin and transformation of ambient volatile organic compounds during a dust-to-haze episode in northwest China
Exploring the inconsistent variations in atmospheric primary and secondary pollutants during the 2016 G20 summit in Hangzhou, China: implications from observations and models
Elevated levels of OH observed in haze events during wintertime in central Beijing
Nitrous acid (HONO) emissions under real-world driving conditions from vehicles in a UK road tunnel
High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China
Trends and emissions of six perfluorocarbons in the Northern Hemisphere and Southern Hemisphere
Heterogeneous N2O5 reactions on atmospheric aerosols at four Chinese sites: improving model representation of uptake parameters
Measurement report: Short-term variation of ammonia concentration in an urban area: contributions of mist evaporation and emissions from a forest canopy with bird droppings
Missing OH reactivity in the global marine boundary layer
14C observations of atmospheric CO2 at Anmyeondo GAW station, Korea: Implications for fossil fuel CO2 and emission ratios
Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China
Pyruvic acid in the boreal forest: gas-phase mixing ratios and impact on radical chemistry
Long-term Variations in Ozone Levels in the Troposphere and Lower Stratosphere over Beijing: Observations and Model Simulations
Sources and sinks driving sulphuric acid concentrations in contrasting environments: implications on proxy calculations
Constraining Ammonia Emissions in Vehicle Plumes Utilizing Nitrogen Stable Isotopes
The variability in Gaseous Elemental Mercury at Villum Research Station, Station Nord in North Greenland from 1999 to 2017
Terpenes and their oxidation products in the French Landes forest: insights from Vocus PTR-TOF measurements
Dramatic increase in reactive volatile organic compound (VOC) emissions from ships at berth after implementing the fuel switch policy in the Pearl River Delta Emission Control Area
Impact of the South Asian monsoon outflow on atmospheric hydroperoxides in the upper troposphere
Variability of hydroxyl radical (OH) reactivity in the Landes maritime pine forest: results from the LANDEX campaign 2017
Estimation of Reactive Inorganic Iodine Fluxes in the Indian and Southern Ocean Marine Boundary Layer
Observationally constrained modeling of atmospheric oxidation capacity and photochemical reactivity in Shanghai, China
Xiaofei Qin, Leiming Zhang, Guochen Wang, Xiaohao Wang, Qingyan Fu, Jian Xu, Hao Li, Jia Chen, Qianbiao Zhao, Yanfen Lin, Juntao Huo, Fengwen Wang, Kan Huang, and Congrui Deng
Atmos. Chem. Phys., 20, 10985–10996, https://doi.org/10.5194/acp-20-10985-2020, https://doi.org/10.5194/acp-20-10985-2020, 2020
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The uncertainties in mercury emissions are much larger from natural sources than anthropogenic sources. A method was developed to quantify the contributions of natural surface emissions to ambient GEM based on PMF modeling. The annual GEM concentration in eastern China showed a decreasing trend from 2015 to 2018, while the relative contribution of natural surface emissions increased significantly from 41 % in 2015 to 57 % in 2018, gradually surpassing those from anthropogenic sources.
Nijing Wang, Achim Edtbauer, Christof Stönner, Andrea Pozzer, Efstratios Bourtsoukidis, Lisa Ernle, Dirk Dienhart, Bettina Hottmann, Horst Fischer, Jan Schuladen, John N. Crowley, Jean-Daniel Paris, Jos Lelieveld, and Jonathan Williams
Atmos. Chem. Phys., 20, 10807–10829, https://doi.org/10.5194/acp-20-10807-2020, https://doi.org/10.5194/acp-20-10807-2020, 2020
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Carbonyl compounds were measured on a ship travelling around the Arabian Peninsula in summer 2017, crossing both highly polluted and extremely clean regions of the marine boundary layer. We investigated the sources and sinks of carbonyls. The results from a global model showed a significant model underestimation for acetaldehyde, a molecule that can influence regional air chemistry. By adding a diurnal oceanic source, the model estimation was highly improved.
Xinghong Cheng, Jianzhong Ma, Junli Jin, Junrang Guo, Yuelin Liu, Jida Peng, Xiaodan Ma, Minglong Qian, Qiang Xia, and Peng Yan
Atmos. Chem. Phys., 20, 10757–10774, https://doi.org/10.5194/acp-20-10757-2020, https://doi.org/10.5194/acp-20-10757-2020, 2020
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We carried out 19 city-circle-around Car MAX-DOAS experiments on the 6th Ring Road of Beijing in Jan, Sep, and Oct 2014. The tropospheric VCDs of NO2 are retrieved and their temporal and spatial distributions are investigated. Then the NOx emission rates in urban Beijing are estimated using the measured NO2 VCDs together with the refined wind fields, NO2-to-NOx ratios, and NO2 lifetimes simulated by the LAPS-WRF-CMAQ model system, and results are compared with the MEIC inventory in 2012.
Jan-Stefan Swartz, Pieter G. van Zyl, Johan P. Beukes, Corinne Galy-Lacaux, Avishkar Ramandh, and Jacobus J. Pienaar
Atmos. Chem. Phys., 20, 10637–10665, https://doi.org/10.5194/acp-20-10637-2020, https://doi.org/10.5194/acp-20-10637-2020, 2020
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Statistical modelling of interdependencies between local, regional and global parameters on long-term trends of atmospheric SO2, NO2 and O2 within proximity of the pollution hotspot in South Africa indicated that changes in meteorological conditions and/or variances in source influences contributed to temporal variability. The impact of increased anthropogenic activities and energy demand was evident, while the El Niño–Southern Oscillation made a significant contribution to O3 levels.
Ilann Bourgeois, Jeff Peischl, Chelsea R. Thompson, Kenneth C. Aikin, Teresa Campos, Hannah Clark, Róisín Commane, Bruce Daube, Glenn W. Diskin, James W. Elkins, Ru-Shan Gao, Audrey Gaudel, Eric J. Hintsa, Bryan J. Johnson, Rigel Kivi, Kathryn McKain, Fred L. Moore, David D. Parrish, Richard Querel, Eric Ray, Ricardo Sánchez, Colm Sweeney, David W. Tarasick, Anne M. Thompson, Valérie Thouret, Jacquelyn C. Witte, Steve C. Wofsy, and Thomas B. Ryerson
Atmos. Chem. Phys., 20, 10611–10635, https://doi.org/10.5194/acp-20-10611-2020, https://doi.org/10.5194/acp-20-10611-2020, 2020
Johannes Bieser, Hélène Angot, Franz Slemr, and Lynwill Martin
Atmos. Chem. Phys., 20, 10427–10439, https://doi.org/10.5194/acp-20-10427-2020, https://doi.org/10.5194/acp-20-10427-2020, 2020
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We use numerical models to determine the origin of air masses measured for elemental gaseous mercury (GEM) at Cape Point (CPT), South Africa. Our analysis is based on 10 years of hourly GEM measurements at CPT from 2007 to 2016. Based on GEM concentration and the origin of the air mass, we identify source and sink regions at CPT. We find, that the warm Agulhas Current to the south-east is the major Hg source and the continent the major sink.
Liwei Wang, Jay G. Slowik, Nidhi Tripathi, Deepika Bhattu, Pragati Rai, Varun Kumar, Pawan Vats, Rangu Satish, Urs Baltensperger, Dilip Ganguly, Neeraj Rastogi, Lokesh K. Sahu, Sachchida N. Tripathi, and André S. H. Prévôt
Atmos. Chem. Phys., 20, 9753–9770, https://doi.org/10.5194/acp-20-9753-2020, https://doi.org/10.5194/acp-20-9753-2020, 2020
Yuqi Shi, Ziyan Xi, Maimaiti Simayi, Jing Li, and Shaodong Xie
Atmos. Chem. Phys., 20, 9351–9369, https://doi.org/10.5194/acp-20-9351-2020, https://doi.org/10.5194/acp-20-9351-2020, 2020
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Beijing had suffered from severe haze pollution prior to the rigorous emission limitations enacted in 2017. We identified scattered coal burning as the largest contributor to ambient volatile organic compounds (VOCs) during the heating season before 2017. The prohibition of scattered coal burning mitigated VOC emissions during winter, but traffic-related sources then became the greatest contributor. However, in other regions, scattered coal burning might still be the key to improve air quality.
Laura Röhler, Martin Schlabach, Peter Haglund, Knut Breivik, Roland Kallenborn, and Pernilla Bohlin-Nizzetto
Atmos. Chem. Phys., 20, 9031–9049, https://doi.org/10.5194/acp-20-9031-2020, https://doi.org/10.5194/acp-20-9031-2020, 2020
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A new clean-up method for the SUS and NTS of organic contaminants was applied to high-volume Arctic air samples. A large number of known and new potential organic chemicals of emerging Arctic concern were identified and prioritised with GC×GC-LRMS; 60 % of the identified contaminants (not yet detected in Arctic samples) do not meet currently accepted criteria for LRATP into polar environments. Without our empirical confirmation, they would not be considered potential Arctic contaminants.
Freya A. Squires, Eiko Nemitz, Ben Langford, Oliver Wild, Will S. Drysdale, W. Joe F. Acton, Pingqing Fu, C. Sue B. Grimmond, Jacqueline F. Hamilton, C. Nicholas Hewitt, Michael Hollaway, Simone Kotthaus, James Lee, Stefan Metzger, Natchaya Pingintha-Durden, Marvin Shaw, Adam R. Vaughan, Xinming Wang, Ruili Wu, Qiang Zhang, and Yanli Zhang
Atmos. Chem. Phys., 20, 8737–8761, https://doi.org/10.5194/acp-20-8737-2020, https://doi.org/10.5194/acp-20-8737-2020, 2020
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Significant air quality problems exist in megacities like Beijing, China. To manage air pollution, legislators need a clear understanding of pollutant emissions. However, emissions inventories have large uncertainties, and reliable field measurements of pollutant emissions are required to constrain them. This work presents the first measurements of traffic-dominated emissions in Beijing which suggest that inventories overestimate these emissions in the region during both winter and summer.
Lei Liu, Xiuying Zhang, Wen Xu, Xuejun Liu, Xuehe Lu, Jing Wei, Yi Li, Yuyu Yang, Zhen Wang, and Anthony Y. H. Wong
Atmos. Chem. Phys., 20, 8641–8658, https://doi.org/10.5194/acp-20-8641-2020, https://doi.org/10.5194/acp-20-8641-2020, 2020
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Excessive atmospheric reactive nitrogen (Nr) deposition can cause a series of negative effects. Thus, it is necessary to accurately estimate Nr deposition to evaluate its impact on the ecosystems and environment. Scientists attempted to estimate surface Nr concentration and deposition using satellite retrievals. We give a thorough review of recent advances in estimating surface Nr concentration and deposition using satellite retrievals of NO2 and NH3 and summarize the existing challenges.
Yuan Yang, Yonghong Wang, Putian Zhou, Dan Yao, Dongsheng Ji, Jie Sun, Yinghong Wang, Shuman Zhao, Wei Huang, Shuanghong Yang, Dean Chen, Wenkang Gao, Zirui Liu, Bo Hu, Renjian Zhang, Limin Zeng, Maofa Ge, Tuukka Petäjä, Veli-Matti Kerminen, Markku Kulmala, and Yuesi Wang
Atmos. Chem. Phys., 20, 8181–8200, https://doi.org/10.5194/acp-20-8181-2020, https://doi.org/10.5194/acp-20-8181-2020, 2020
Danilo Custodio, Ralf Ebinghaus, T. Gerard Spain, and Johannes Bieser
Atmos. Chem. Phys., 20, 7929–7939, https://doi.org/10.5194/acp-20-7929-2020, https://doi.org/10.5194/acp-20-7929-2020, 2020
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Using a stereo algorithm, we reconstructed 99.9 % of the total atmospheric gas mercury and presented a new insight into atmospheric mercury source assessing, which can have great relevance for policy and regulations in light of the Minamata convention.
Franz Slemr, Lynwill Martin, Casper Labuschagne, Thumeka Mkololo, Hélène Angot, Olivier Magand, Aurélien Dommergue, Philippe Garat, Michel Ramonet, and Johannes Bieser
Atmos. Chem. Phys., 20, 7683–7692, https://doi.org/10.5194/acp-20-7683-2020, https://doi.org/10.5194/acp-20-7683-2020, 2020
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Monitoring of atmospheric mercury (Hg) concentrations is an important part of the effectiveness evaluation of the Minamata Convention on Hg. Hg concentrations in 2012–2017 at Cape Point, South Africa, and at Amsterdam Island in the remote Indian Ocean are comparable, and no trend or a slightly downward trend was observed at both stations. Over the 2007–2017 period an upward trend was observed at CPT which was driven mainly by the 2007–2014 data. The trend and its change are discussed.
Kirsti Ashworth, Silvia Bucci, Peter J. Gallimore, Junghwa Lee, Beth S. Nelson, Alberto Sanchez-Marroquín, Marina B. Schimpf, Paul D. Smith, Will S. Drysdale, Jim R. Hopkins, James D. Lee, Joe R. Pitt, Piero Di Carlo, Radovan Krejci, and James B. McQuaid
Atmos. Chem. Phys., 20, 7193–7216, https://doi.org/10.5194/acp-20-7193-2020, https://doi.org/10.5194/acp-20-7193-2020, 2020
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In July 2017 we flew three research flights around London during European Facility for Airborne Research (EUFAR) training. We made continuous measurements of concentrations of key pollutants (ozone, NOx, aerosol particles, CO, CO2 and methane) and meteorology, and we collected periodic samples of air to analyse for volatile organic compounds. We saw evidence that plumes of pollution from the city, strong local emissions and pollution from distant sources all contribute to regional pollution.
Qi Hao, Nan Jiang, Ruiqin Zhang, Liuming Yang, and Shengli Li
Atmos. Chem. Phys., 20, 7087–7102, https://doi.org/10.5194/acp-20-7087-2020, https://doi.org/10.5194/acp-20-7087-2020, 2020
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The HONO concentrations during clean, polluted, and severely polluted days were 1.2, 2.3, and 3.7 ppbv. The contributions of the three sources varied under different pollution levels. The proportion of homogenization gradually increased in the second half of the night due to the steady increase in NO. The values of POH+NOnet, CHONO, and Punknown in the severely polluted period were comparatively larger than those in other periods, indicating that HONO participated in many reactions.
Tianshu Chen, Likun Xue, Penggang Zheng, Yingnan Zhang, Yuhong Liu, Jingjing Sun, Guangxuan Han, Hongyong Li, Xin Zhang, Yunfeng Li, Hong Li, Can Dong, Fei Xu, Qingzhu Zhang, and Wenxing Wang
Atmos. Chem. Phys., 20, 7069–7086, https://doi.org/10.5194/acp-20-7069-2020, https://doi.org/10.5194/acp-20-7069-2020, 2020
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Oil production is a significant source of ambient VOCs, but its impact on air quality has long been overlooked in China. We addressed this gap by conducting field campaigns in an oil field region followed by chemical modeling analyses. The VOC speciation profiles from the oil field emissions were directly measured for the first time in China. This study emphasizes the importance of oil extraction to photochemical pollution and atmospheric chemistry in the oil production regions of China.
Jianzhong Ma, Steffen Dörner, Sebastian Donner, Junli Jin, Siyang Cheng, Junrang Guo, Zhanfeng Zhang, Jianqiong Wang, Peng Liu, Guoqing Zhang, Janis Pukite, Johannes Lampel, and Thomas Wagner
Atmos. Chem. Phys., 20, 6973–6990, https://doi.org/10.5194/acp-20-6973-2020, https://doi.org/10.5194/acp-20-6973-2020, 2020
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We made ground-based MAX-DOAS measurements at the Mt. Waliguan WMO GAW global baseline station (WLG) in the Tibetan Plateau during the years 2012–2015. We retrieve the differential slant column densities (dSCDs) of NO2, SO2, HCHO, and BrO from measured spectra at different elevation angles. Mixing ratios of these trace gases in the background troposphere over WLG are derived based on these dSCDs at a 1° elevation angle and the TRACY-2 radiative transfer model simulations.
Heidi Hellén, Simon Schallhart, Arnaud P. Praplan, Toni Tykkä, Mika Aurela, Annalea Lohila, and Hannele Hakola
Atmos. Chem. Phys., 20, 7021–7034, https://doi.org/10.5194/acp-20-7021-2020, https://doi.org/10.5194/acp-20-7021-2020, 2020
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We studied biogenic volatile organic compound emissions and their ambient concentrations in a sub-Arctic wetland. Although isoprene was the main terpenoid emitted, sesquiterpene emissions were also highly significant, especially in early summer. Sesquiterpenes have much higher potential to form secondary organic aerosol than isoprenes. High sesquiterpene emissions during early summer suggested that melting snow and thawing soil could be an important source of these compounds.
Ivan Tadic, John N. Crowley, Dirk Dienhart, Philipp Eger, Hartwig Harder, Bettina Hottmann, Monica Martinez, Uwe Parchatka, Jean-Daniel Paris, Andrea Pozzer, Roland Rohloff, Jan Schuladen, Justin Shenolikar, Sebastian Tauer, Jos Lelieveld, and Horst Fischer
Atmos. Chem. Phys., 20, 6769–6787, https://doi.org/10.5194/acp-20-6769-2020, https://doi.org/10.5194/acp-20-6769-2020, 2020
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We present shipborne observations of NO, NO2, O3, HCHO, OH, HO2, H2O and the actinic flux obtained in the marine boundary layer (MBL) around the Arabian Peninsula during the summer 2017 AQABA ship campaign. NOx (NO+NO2) and O3 observations clearly showed anthropogenic influence in the MBL around the Arabian Peninsula. The observations were also used to calculate net O3 production in the MBL around the Arabian Peninsula, which was greatest over the northern Red Sea, Oman Gulf and Arabian Gulf.
Men Xia, Xiang Peng, Weihao Wang, Chuan Yu, Peng Sun, Yuanyuan Li, Yuliang Liu, Zhengning Xu, Zhe Wang, Zheng Xu, Wei Nie, Aijun Ding, and Tao Wang
Atmos. Chem. Phys., 20, 6147–6158, https://doi.org/10.5194/acp-20-6147-2020, https://doi.org/10.5194/acp-20-6147-2020, 2020
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ClNO2 and Cl2 can be photolyzed by sunlight to produce a highly reactive Cl atom which affects air quality and climate. We observed high ClNO2 and Cl2 concentrations during a recent field study in east China. We analyzed the data and proposed a new hypothesis on the Cl2 production mechanism. Yields of ClNO2 and Cl2 from N2O2 uptake were parameterized using observational constraints, and they can be used in air quality models to improve simulations of atmospheric photochemistry and air quality.
Achim Edtbauer, Christof Stönner, Eva Y. Pfannerstill, Matias Berasategui, David Walter, John N. Crowley, Jos Lelieveld, and Jonathan Williams
Atmos. Chem. Phys., 20, 6081–6094, https://doi.org/10.5194/acp-20-6081-2020, https://doi.org/10.5194/acp-20-6081-2020, 2020
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Marine regions where deep nutrient-rich water is pushed towards the surface are called upwelling regions. In these nutrient-rich waters large algal blooms form which are the basis of the marine food web. We measured methane sulfonamide, a molecule containing sulfur and nitrogen, for the first time in ambient air and could show that the origin of this emission is an algal bloom near the Somalia upwelling. Sulfur-containing compounds from algae can promote particle formation over the oceans.
Ying Jiang, Likun Xue, Rongrong Gu, Mengwei Jia, Yingnan Zhang, Liang Wen, Penggang Zheng, Tianshu Chen, Hongyong Li, Ye Shan, Yong Zhao, Zhaoxin Guo, Yujian Bi, Hengde Liu, Aijun Ding, Qingzhu Zhang, and Wenxing Wang
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-377, https://doi.org/10.5194/acp-2020-377, 2020
Revised manuscript accepted for ACP
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We analyzed the characteristics and sources of HONO in the upper boundary layer and lower free troposphere in the North China Plain, based on the field measurements at Mt. Tai. Higher than expected levels and broad daytime peaks of HONO were observed. Without presence of ground surfaces, aerosol surface plays a key role in the heterogeneous HONO formation at high altitudes. Models without additional HONO sources largely underestimated the oxidation processes in the elevation atmospheres.
Yanjun Zhang, Otso Peräkylä, Chao Yan, Liine Heikkinen, Mikko Äijälä, Kaspar R. Daellenbach, Qiaozhi Zha, Matthieu Riva, Olga Garmash, Heikki Junninen, Pentti Paatero, Douglas Worsnop, and Mikael Ehn
Atmos. Chem. Phys., 20, 5945–5961, https://doi.org/10.5194/acp-20-5945-2020, https://doi.org/10.5194/acp-20-5945-2020, 2020
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By utilizing a new analysis approach, we investigated atmospheric oxidation of biogenic volatile emissions in a Finnish forest, measured by chemical ionization mass spectrometry. We identified several new compound groups, including low-volatility accretion products and their formation pathways. Results from this study are important for understanding atmospheric aerosol formation, as well as providing new perspectives on future lab studies and data analysis of short-lived species.
Shigeyuki Ishidoya, Hirofumi Sugawara, Yukio Terao, Naoki Kaneyasu, Nobuyuki Aoki, Kazuhiro Tsuboi, and Hiroaki Kondo
Atmos. Chem. Phys., 20, 5293–5308, https://doi.org/10.5194/acp-20-5293-2020, https://doi.org/10.5194/acp-20-5293-2020, 2020
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Atmospheric O2 and CO2 concentrations, along with CO2 flux, have been observed in a megacity, Tokyo, Japan. The O2 : CO2 exchange ratio for net turbulent O2 and CO2 fluxes (ORF) between the urban area and the overlaying atmosphere was obtained, and we applied it to estimate the diurnal cycles of CO2 fluxes from gas and liquid fuel consumption separately. We found simultaneous observations of ORF and CO2 flux are useful in validating CO2 emission inventories from statistical data.
Dan Tong, Jing Cheng, Yang Liu, Sha Yu, Liu Yan, Chaopeng Hong, Yu Qin, Hongyan Zhao, Yixuan Zheng, Guannan Geng, Meng Li, Fei Liu, Yuxuan Zhang, Bo Zheng, Leon Clarke, and Qiang Zhang
Atmos. Chem. Phys., 20, 5729–5757, https://doi.org/10.5194/acp-20-5729-2020, https://doi.org/10.5194/acp-20-5729-2020, 2020
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Future trends in air pollution and greenhouse gas emissions in China are of great concern to the community. Here we developed a sophisticated dynamic projection model to understand 2015–2050 emission pathways under a range of socio-economic, climate policy, and pollution control scenarios. By coupling strong low-carbon transitions and clean air policy, emissions of major air pollutants in China will be reduced by 58–87 % during 2015–2050. This work can support future co-governance policy design.
Xiaoning Xuan, Zhongming Chen, Yiwei Gong, Hengqing Shen, and Shiyi Chen
Atmos. Chem. Phys., 20, 5513–5526, https://doi.org/10.5194/acp-20-5513-2020, https://doi.org/10.5194/acp-20-5513-2020, 2020
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In this study, we found that the effective field-derived Henry's law constant for the ground rainwater and the gas-phase H2O2 was about 2.5 times that of the theoretical value, and the effective gas–particle partitioning coefficient for the aerosol particle and the gas-phase H2O2 was 4 orders of magnitude higher than the theoretical one. We suggested the missing source of H2O2 in the particulate phase, e.g. the contribution from the decomposition/hydrolysis of organic peroxides.
Jun Zheng, Xiaowen Shi, Yan Ma, Xinrong Ren, Halim Jabbour, Yiwei Diao, Weiwei Wang, Yifeng Ge, Yuchan Zhang, and Wenhui Zhu
Atmos. Chem. Phys., 20, 5457–5475, https://doi.org/10.5194/acp-20-5457-2020, https://doi.org/10.5194/acp-20-5457-2020, 2020
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A high level of nitrous acid (HONO) is formed from NOx emitted by industrial activities; this HONO then promotes secondary air pollutant (e.g., aerosol and O3) formation within these plumes by contributing to free-radical production. Heterogeneous reactions on aerosol surfaces are found to be one of the major formation routes of HONO. Therefore, HONO plays a synergic role in haze formation in heavily industrialized areas.
Yonggang Xue, Yu Huang, Steven Sai Hang Ho, Long Chen, Liqin Wang, Shuncheng Lee, and Junji Cao
Atmos. Chem. Phys., 20, 5425–5436, https://doi.org/10.5194/acp-20-5425-2020, https://doi.org/10.5194/acp-20-5425-2020, 2020
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Particulate active metallic oxides in dust were proposed to influence the photochemical reactions of ambient volatile organic compounds (VOCs). A case study investigated the origin and transformation of VOCs during a windblown dust-to-haze pollution episode. In the dust event, a sharp decrease in VOC loading and aging of their components was observed. An increase in Ti and Fe and a fast decrease in trans-/cis-2-butene ratios demonstrated that dust can accelerate the oxidation of ambient VOCs.
Gen Zhang, Honghui Xu, Hongli Wang, Likun Xue, Jianjun He, Wanyun Xu, Bing Qi, Rongguang Du, Chang Liu, Zeyuan Li, Ke Gui, Wanting Jiang, Linlin Liang, Yan Yan, and Xiaoyan Meng
Atmos. Chem. Phys., 20, 5391–5403, https://doi.org/10.5194/acp-20-5391-2020, https://doi.org/10.5194/acp-20-5391-2020, 2020
Eloise J. Slater, Lisa K. Whalley, Robert Woodward-Massey, Chunxiang Ye, James D. Lee, Freja Squires, James R. Hopkins, Rachel E. Dunmore, Marvin Shaw, Jacqueline F. Hamilton, Alastair C. Lewis, Leigh R. Crilley, Louisa Kramer, William Bloss, Tuan Vu, Yele Sun, Weiqi Xu, Siyao Yue, Lujie Ren, W. Joe F. Acton, C. Nicholas Hewitt, Xinming Wang, Pingqing Fu, and Dwayne E. Heard
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-362, https://doi.org/10.5194/acp-2020-362, 2020
Revised manuscript accepted for ACP
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The paper details atmospheric chemistry in a mega-city (Beijing), focussing on radicals which mediate the formation of secondary pollutants such as ozone and particles. Highly polluted conditions were experienced, including the highest ever levels of nitric oxide (NO) with simultaneous radical measurements. Radical concentrations were large during “haze” events, demonstrating active photochemistry was occurring. Modelling showed that our understanding of the chemistry at high NOx is incomplete.
Louisa J. Kramer, Leigh R. Crilley, Thomas J. Adams, Stephen M. Ball, Francis D. Pope, and William J. Bloss
Atmos. Chem. Phys., 20, 5231–5248, https://doi.org/10.5194/acp-20-5231-2020, https://doi.org/10.5194/acp-20-5231-2020, 2020
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HONO is a large source of OH radicals, which can drive VOC oxidation, leading to the formation of ozone and secondary organic aerosols. Here we investigate primary vehicle emissions of HONO from measurements in a road tunnel in Birmingham, UK. A HONO/NOx emission ratio was detemined and compared to previous studies. Results indicate HONO/NOx has not varied much over the last two decades and technologies aimed at reducing NO2 may have also resulted in a reduction in direct HONO vehicle emissions.
Fanhao Meng, Min Qin, Ke Tang, Jun Duan, Wu Fang, Shuaixi Liang, Kaidi Ye, Pinhua Xie, Yele Sun, Conghui Xie, Chunxiang Ye, Pingqing Fu, Jianguo Liu, and Wenqing Liu
Atmos. Chem. Phys., 20, 5071–5092, https://doi.org/10.5194/acp-20-5071-2020, https://doi.org/10.5194/acp-20-5071-2020, 2020
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Nitrous acid (HONO), a major precursor of the OH radical, plays a key role in atmospheric chemistry, but its sources are still debated. The first high-resolution vertical measurements of HONO and NO2 were conducted in Beijing to investigate the nocturnal sources of HONO at different stages of pollution. The ground surface dominated HONO production by heterogeneous conversion of NO2 during clean episodes, but the aerosol production was an important nighttime HONO source during haze episodes.
Elise S. Droste, Karina E. Adcock, Matthew J. Ashfold, Charles Chou, Zoë Fleming, Paul J. Fraser, Lauren J. Gooch, Andrew J. Hind, Ray L. Langenfelds, Emma Leedham Elvidge, Norfazrin Mohd Hanif, Simon O'Doherty, David E. Oram, Chang-Feng Ou-Yang, Marios Panagi, Claire E. Reeves, William T. Sturges, and Johannes C. Laube
Atmos. Chem. Phys., 20, 4787–4807, https://doi.org/10.5194/acp-20-4787-2020, https://doi.org/10.5194/acp-20-4787-2020, 2020
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We update the tropospheric trends and emissions of six perfluorocarbon (PFC) gases, including separate isomers. Trends for these strong greenhouse gases are still increasing, but at slower rates than previously. The lack of natural sinks results in the global accumulation of 833 million metric tonnes of CO2 equivalent for these six PFCs by 2017. Modelling results indicate potential source regions and types in East Asia, but we find that many emissions are unaccounted for in emission reports.
Chuan Yu, Zhe Wang, Men Xia, Xiao Fu, Weihao Wang, Yee Jun Tham, Tianshu Chen, Penggang Zheng, Hongyong Li, Ye Shan, Xinfeng Wang, Likun Xue, Yan Zhou, Dingli Yue, Yubo Ou, Jian Gao, Keding Lu, Steven S. Brown, Yuanhang Zhang, and Tao Wang
Atmos. Chem. Phys., 20, 4367–4378, https://doi.org/10.5194/acp-20-4367-2020, https://doi.org/10.5194/acp-20-4367-2020, 2020
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This study provides a holistic picture of N2O5 heterogeneous uptake on ambient aerosols and the influencing factors under various climatic and chemical conditions in China, and it proposes an observation-based empirical parameterization. The empirical parameterization can be used in air quality models to improve the prediction of PM2.5 and photochemical pollution in China and similar polluted regions of the world.
Kazuo Osada
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-244, https://doi.org/10.5194/acp-2020-244, 2020
Revised manuscript accepted for ACP
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Various sources and meteorological conditions affect the short-term variation of NH3 concentrations in the urban atmosphere. Analysis of 2 years of hourly data suggests that mist evaporation and stomata exchange of tree leaves after effects of bird droppings engender a rapid increase of NH3 concentrations. Emissions from urban tree canopies are a new mode of passing reactive nitrogen that has never been described as an important source in the literature.
Alexander B. Thames, William H. Brune, David O. Miller, Hannah M. Allen, Eric C. Apel, Donald R. Blake, T. Paul Bui, Roisin Commane, John D. Crounse, Bruce C. Daube, Glenn S. Diskin, Joshua P. DiGangi, James W. Elkins, Samuel R. Hall, Thomas F. Hanisco, Reem A. Hannun, Eric Hintsa, Rebecca S. Hornbrook, Michelle J. Kim, Kathryn McKain, Fred L. Moore, Julie M. Nicely, Jeffrey Peischl, Thomas B. Ryerson, Jason M. St. Clair, Colm Sweeney, Alex Teng, Chelsea R. Thompson, Kirk Ullmann, Paul O. Wennberg, and Glenn M. Wolfe
Atmos. Chem. Phys., 20, 4013–4029, https://doi.org/10.5194/acp-20-4013-2020, https://doi.org/10.5194/acp-20-4013-2020, 2020
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Oceans and the atmosphere exchange volatile gases that react with the hydroxyl radical (OH). During a NASA airborne study, measurements of the total frequency of OH reactions, called the OH reactivity, were made in the marine boundary layer of the Atlantic and Pacific oceans. The measured OH reactivity often exceeded the OH reactivity calculated from measured chemical species. This missing OH reactivity appears to be from unmeasured volatile organic compounds coming out of the ocean.
Haeyoung Lee, Edward J. Dlugokencky, Jocelyn C. Turnbull, Sepyo Lee, Scott J. Lehman, John B. Miller, Gabrielle Petron, Jeongsik Lim, Gang-Woong Lee, Sang-Sam Lee, and Young-San Park
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-122, https://doi.org/10.5194/acp-2020-122, 2020
Revised manuscript accepted for ACP
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To understand Korea's carbon dioxide (CO2) emissions and sinks as well as those of the surrounding region, we used flask-air samples collected for two years at Anmyeondo (36.53° N, 126.32° E; 46 m a.s.l.), South Korea, for analysis of observed 14C in atmospheric CO2 as a tracer of fossil fuel CO2 contribution
(Cff). Here, we showed our observation result of 14C and Cff. SF6 and CO can be good proxies of Cff in this study and the ratio of CO to Cff was compared to a bottom-up inventory.
Qiuyue Zhao, Jun Bi, Qian Liu, Zhenghao Ling, Guofeng Shen, Feng Chen, Yuezhen Qiao, Chunyan Li, and Zongwei Ma
Atmos. Chem. Phys., 20, 3905–3919, https://doi.org/10.5194/acp-20-3905-2020, https://doi.org/10.5194/acp-20-3905-2020, 2020
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Understanding the composition, temporal variability and source apportionment of volatile organic compounds (VOCs) is necessary for determining effective control measures to minimize VOCs and their related photochemical pollution. This study conducted source apportionments of VOCs and evaluated their contributions to ozone formation at an urban site in Nanjing with data from 1-year of field measurements.
Philipp G. Eger, Jan Schuladen, Nicolas Sobanski, Horst Fischer, Einar Karu, Jonathan Williams, Matthieu Riva, Qiaozhi Zha, Mikael Ehn, Lauriane L. J. Quéléver, Simon Schallhart, Jos Lelieveld, and John N. Crowley
Atmos. Chem. Phys., 20, 3697–3711, https://doi.org/10.5194/acp-20-3697-2020, https://doi.org/10.5194/acp-20-3697-2020, 2020
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Pyruvic acid, CH3C(O)C(O)OH, is an organic acid of biogenic origin that plays a crucial role in plant metabolism, is present in tropospheric air in both gas-phase and aerosol-phase, and is implicated in the formation of secondary organic aerosols. From the first gas-phase measurements of pyruvic acid in the Finnish boreal forest in September 2016 we derive its source strength and discuss potential sources and sinks, with a focus on the relevance of gas-phase pyruvic acid for radical chemistry.
Yuli Zhang, Mengchu Tao, Jinqiang Zhang, Yi Liu, Hongbin Chen, Zhaonan Cai, and Paul Konopka
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2019-1145, https://doi.org/10.5194/acp-2019-1145, 2020
Revised manuscript accepted for ACP
Lubna Dada, Ilona Ylivinkka, Rima Baalbaki, Chang Li, Yishou Guo, Chao Yan, Lei Yao, Nina Sarnela, Tuija Jokinen, Kaspar R. Daellenbach, Rujing Yin, Chenjuan Deng, Biwu Chu, Tuomo Nieminen, 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. Discuss., https://doi.org/10.5194/acp-2020-155, https://doi.org/10.5194/acp-2020-155, 2020
Revised manuscript accepted for ACP
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We rely on sulphuric 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 sulphuric acid in these environments and to derive a new sulphuric acid proxy to be utilized in locations and during periods when it is not measured.
Wendell W. Walters, Linlin Song, Jiajue Chai, Yunting Fang, Nadia Colombi, and Meredith G. Hastings
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-188, https://doi.org/10.5194/acp-2020-188, 2020
Revised manuscript accepted for ACP
Henrik Skov, Jens Hjorth, Claus Nordstrøm, Bjarne Jensen, Christel Christoffersen, Maria Bech Poulsen, Jesper Baldtzer Liisberg, David Beddows, Manuel Dall'Osto, and Jesper Christensen
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2019-912, https://doi.org/10.5194/acp-2019-912, 2020
Revised manuscript accepted for ACP
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Mercury is toxic in all its forms and it bioaccumulate in foodwebs, it is ubiquitous in the atmosphere and atmospheric transport is an important source for this element in the Arctic. Measurements of gaseous elemental mercury have been carried out at the Villum Research Station at Station Nord in north Greenland since 1999. The measurements are compared with model results from the Danish Eulerian Hemispheric Model. In this way, the dynamics of mercury is investigated.
Haiyan Li, Matthieu Riva, Pekka Rantala, Liine Heikkinen, Kaspar Daellenbach, Jordan E. Krechmer, Pierre-Marie Flaud, Douglas Worsnop, Markku Kulmala, Eric Villenave, Emilie Perraudin, Mikael Ehn, and Federico Bianchi
Atmos. Chem. Phys., 20, 1941–1959, https://doi.org/10.5194/acp-20-1941-2020, https://doi.org/10.5194/acp-20-1941-2020, 2020
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We deployed the recently developed Vocus PTR-TOF in the French Landes forest during summertime to gain insights into terpene chemistry. In addition to isoprene, monoterpenes, sesquiterpenes, and the low-volatility diterpenes, various terpene reaction products are characterized. Through the analysis of terpene chemistry, we demonstrate the capability of the Vocus PTR-TOF for the detection of oxidized reaction products, highlighting its importance in investigating atmospheric oxidation processes.
Zhenfeng Wu, Yanli Zhang, Junjie He, Hongzhan Chen, Xueliang Huang, Yujun Wang, Xu Yu, Weiqiang Yang, Runqi Zhang, Ming Zhu, Sheng Li, Hua Fang, Zhou Zhang, and Xinming Wang
Atmos. Chem. Phys., 20, 1887–1900, https://doi.org/10.5194/acp-20-1887-2020, https://doi.org/10.5194/acp-20-1887-2020, 2020
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As ship emissions impact air quality in coastal areas, ships are required to switch their fuel from high-sulfur residual fuel oil to
low-sulfur diesel or heavy oil in emission control areas (ECA). Our study reveals that while this policy did result in a large drop in ship emissions of particulate matter and sulfur dioxide, emissions of volatile organic compounds (VOCs), however, became over 10 times larger and therefore risks ozone pollution control in harbor cities.
Bettina Hottmann, Sascha Hafermann, Laura Tomsche, Daniel Marno, Monica Martinez, Hartwig Harder, Andrea Pozzer, Marco Neumaier, Andreas Zahn, Birger Bohn, Helmut Ziereis, Jos Lelieveld, and Horst Fischer
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-93, https://doi.org/10.5194/acp-2020-93, 2020
Revised manuscript accepted for ACP
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During OMO we observed enhanced mixing ratios of hydroperoxides (ROOH) in the Asian Monsoon Anticyclone (AMA) relative to the background. The observed mixing ratios are higher than steady-state calculations and EMAC simulations, especially in the AMA, indicating atmospheric transport of ROOH. Deviations to EMAC are likely due to uncertainties in the scavenging efficiencies. Longitudinal gradients indicate a pool of ROOH towards the center of the AMA, associated with upwind convection over India.
Sandy Bsaibes, Mohamad Al Ajami, Kenneth Mermet, François Truong, Sébastien Batut, Christophe Hecquet, Sébastien Dusanter, Thierry Léornadis, Stéphane Sauvage, Julien Kammer, Pierre-Marie Flaud, Emilie Perraudin, Eric Villenave, Nadine Locoge, Valérie Gros, and Coralie Schoemaecker
Atmos. Chem. Phys., 20, 1277–1300, https://doi.org/10.5194/acp-20-1277-2020, https://doi.org/10.5194/acp-20-1277-2020, 2020
Swaleha Inamdar, Liselotte Tinel, Rosie Chance, Lucy J. Carpenter, Prabhakaran Sabu, Racheal Chacko, Sarat C. Tripathy, Anvita U. Kerkar, Alok K. Sinha, Parli Venkateswaran Bhaskar, Amit Sarkar, Rajdeep Roy, Tomas Sherwen, Carlos Cuevas, Alfonso Saiz-Lopez, Kirpa Ram, and Anoop S. Mahajan
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2019-1052, https://doi.org/10.5194/acp-2019-1052, 2020
Revised manuscript accepted for ACP
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Iodine chemistry is generating a lot of interest because of its impacts on the oxidising capacity of the marine boundary and depletion of ozone. However one of the challenges has been predicting the right levels of iodine in the models, which depend on parameterisations for the emissions from the sea surface. This paper discusses the different parameterisations available and compares it with observations, showing that our current knowledge is still insufficient, especially on a regional scale.
Jian Zhu, Shanshan Wang, Hongli Wang, Shengao Jing, Shengrong Lou, Alfonso Saiz-Lopez, and Bin Zhou
Atmos. Chem. Phys., 20, 1217–1232, https://doi.org/10.5194/acp-20-1217-2020, https://doi.org/10.5194/acp-20-1217-2020, 2020
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To investigate the summer ozone pollution, observationally constrained modelling was carried out to study atmospheric oxidation capacity (AOC), OH reactivity, OH chain length, and HOx budget for three different ozone concentration levels in Shanghai, China. It shows that AOC, dominated by reactions involving OH radical during the daytime, has a positive correlation with ozone levels. Some key VOCs species are very important for the OH reactivity and also the ozone formation potential.
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Short summary
Polycyclic aromatic hydrocarbons (PAHs) are not declining in Arctic air despite reductions in global emissions. We studied PAHs and oxy- and nitro-PAHs in gas and particulate phases of Arctic aerosol, collected in autumn 2018 in Longyearbyen, Svalbard. PAHs were found at comparable levels as at other background Scandinavian and European air sampling stations. Statistical analysis confirmed that a coal-fired power plant and vehicle and marine traffic are the main local contributors of PAHs.
Polycyclic aromatic hydrocarbons (PAHs) are not declining in Arctic air despite reductions in...
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