Articles | Volume 19, issue 11
https://doi.org/10.5194/acp-19-7507-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-19-7507-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Jun 2019
Research article |
| 05 Jun 2019
| 05 Jun 2019
Optically effective complex refractive index of coated black carbon aerosols: from numerical aspects
Xiaolin Zhang
CORRESPONDING AUTHOR
Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Collaborative
Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Joint
International Research Laboratory of Climate and Environment Change (ILCEC)/Earth System Modeling
Center (ESMC)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,
Nanjing University of Information Science & Technology, Nanjing, 210044, China
School of Atmospheric Physics, Nanjing University of Information
Science & Technology, Nanjing, 210044, China
Mao Mao
CORRESPONDING AUTHOR
Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Collaborative
Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Joint
International Research Laboratory of Climate and Environment Change (ILCEC)/Earth System Modeling
Center (ESMC)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,
Nanjing University of Information Science & Technology, Nanjing, 210044, China
School of Atmospheric Physics, Nanjing University of Information
Science & Technology, Nanjing, 210044, China
Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Collaborative
Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Joint
International Research Laboratory of Climate and Environment Change (ILCEC)/Earth System Modeling
Center (ESMC)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,
Nanjing University of Information Science & Technology, Nanjing, 210044, China
School of Atmospheric Physics, Nanjing University of Information
Science & Technology, Nanjing, 210044, China
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Subject: Aerosols | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Black carbon (BC) exerts notable warming effects. We use a particle-resolved model to investigate the long-term behavior of the BC mixing state, revealing its compositions, coating thickness distribution, and optical properties all stabilize with a characteristic time of less than 1 d. This study can effectively simplify the description of the BC mixing state, which facilitates the precise assessment of the optical properties of BC aerosols in global and chemical transport models.
Qianyi Huo, Zhicong Yin, Xiaoqing Ma, and Huijun Wang
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Dust days during the spring seasons of 2015–2023 in North China were classified into Mongolian cyclone and cold high types depending on the presence of the Mongolian cyclone. The Mongolian cyclone type led to more frequent and severe dust weather, indicated by PM10 concentrations. To comprehensively forecast the two types of dust weather, a common predictor was established based on 500 hPa anomalous circulation systems, offering insights for dust weather forecasting and climate prediction.
Mariya Petrenko, Ralph Kahn, Mian Chin, Susanne E. Bauer, Tommi Bergman, Huisheng Bian, Gabriele Curci, Ben Johnson, Johannes W. Kaiser, Zak Kipling, Harri Kokkola, Xiaohong Liu, Keren Mezuman, Tero Mielonen, Gunnar Myhre, Xiaohua Pan, Anna Protonotariou, Samuel Remy, Ragnhild Bieltvedt Skeie, Philip Stier, Toshihiko Takemura, Kostas Tsigaridis, Hailong Wang, Duncan Watson-Parris, and Kai Zhang
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We compared smoke plume simulations from 11 global models to each other and to satellite smoke amount observations aimed at constraining smoke source strength. In regions where plumes are thick and background aerosol is low, models and satellites compare well. However, the input emission inventory tends to underestimate in many places, and particle property and loss rate assumptions vary enormously among models, causing uncertainties that require systematic in situ measurements to resolve.
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Aerosol particles that help form ice in clouds vary in number and type around the world and with time. However, in many weather and climate models cloud ice is not linked to aerosols that are known to nucleate ice. Here we report the first steps towards representing ice-nucleating particles within the UK Earth System Model. We conclude that in addition to ice nucleation by sea spray and mineral components of soil dust, we also need to represent ice nucleation by the organic components of soils.
Ryan Schmedding and Andreas Zuend
Atmos. Chem. Phys., 25, 327–346, https://doi.org/10.5194/acp-25-327-2025, https://doi.org/10.5194/acp-25-327-2025, 2025
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Four different approaches for computing the interfacial tension between liquid phases in aerosol particles were tested for particles with diameters from 10 nm to more than 5 μm. Antonov's rule led to the strongest reductions in the onset relative humidity of liquid–liquid phase separation and reproduced measured interfacial tensions for highly immiscible systems. A modified form of the Butler equation was able to best reproduce measured interfacial tensions in more miscible systems.
Masaru Yoshioka, Daniel P. Grosvenor, Ben B. B. Booth, Colin P. Morice, and Ken S. Carslaw
Atmos. Chem. Phys., 24, 13681–13692, https://doi.org/10.5194/acp-24-13681-2024, https://doi.org/10.5194/acp-24-13681-2024, 2024
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A 2020 regulation has reduced sulfur emissions from shipping by about 80 %, leading to a decrease in atmospheric aerosols that have a cooling effect primarily by affecting cloud properties and amounts. Our climate model simulations predict a global temperature increase of 0.04 K over the next 3 decades as a result, which could contribute to surpassing the Paris Agreement's 1.5 °C target. Reduced aerosols may have also contributed to the recent temperature spikes.
Alcide Zhao, Laura J. Wilcox, and Claire L. Ryder
Atmos. Chem. Phys., 24, 13385–13402, https://doi.org/10.5194/acp-24-13385-2024, https://doi.org/10.5194/acp-24-13385-2024, 2024
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Climate models include desert dust aerosols, which cause atmospheric heating and can change circulation patterns. We assess the effect of dust on the Indian and east Asian summer monsoons through multi-model experiments isolating the effect of dust in current climate models for the first time. Dust atmospheric heating results in a southward shift of western Pacific equatorial rainfall and an enhanced Indian summer monsoon. This shows the importance of accurate dust representation in models.
Ragnhild Bieltvedt Skeie, Rachael Byrom, Øivind Hodnebrog, Caroline Jouan, and Gunnar Myhre
Atmos. Chem. Phys., 24, 13361–13370, https://doi.org/10.5194/acp-24-13361-2024, https://doi.org/10.5194/acp-24-13361-2024, 2024
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In 2020, new regulations by the International Maritime Organization regarding sulfur emissions came into force, reducing emissions of SO2 from the shipping sector by approximately 80 %. In this study, we use multiple models to calculate how much the Earth energy balance changed due to the emission reduction or the so-called effective radiative forcing. The calculated effective radiative forcing is weak, comparable to the effect of the increase in CO2 over the last 2 to 3 years.
Mingxu Liu, Hitoshi Matsui, Douglas S. Hamilton, Sagar D. Rathod, Kara D. Lamb, and Natalie M. Mahowald
Atmos. Chem. Phys., 24, 13115–13127, https://doi.org/10.5194/acp-24-13115-2024, https://doi.org/10.5194/acp-24-13115-2024, 2024
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Atmospheric aerosol deposition provides bioavailable iron to promote marine primary production, yet the estimates of its fluxes remain highly uncertain. This study, by performing global aerosol simulations, demonstrates that iron-containing particle size upon emission is a critical factor in regulating soluble iron input to open oceans. Further observational constraints on this are needed to reduce modeling uncertainties.
Camelia Talianu, Jeni Vasilescu, Doina Nicolae, Alexandru Ilie, Andrei Dandocsi, Anca Nemuc, and Livio Belegante
EGUsphere, https://doi.org/10.5194/egusphere-2024-2930, https://doi.org/10.5194/egusphere-2024-2930, 2024
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Bucharest, Romania's capital, has successfully used mobile measurements and mixed-effects LUR models to derive seasonal maps of near-surface PM10, NO2, and UFP. The data was collected during two intensive campaigns, covering high-traffic streets, residential, industrial, and commercial districts. The model's performance was evaluated, demonstrating its potential for high-resolution mapping in other cities with well-characterized urban structures and diverse in situ monitoring stations.
Jingmin Li, Mattia Righi, Johannes Hendricks, Christof G. Beer, Ulrike Burkhardt, and Anja Schmidt
Atmos. Chem. Phys., 24, 12727–12747, https://doi.org/10.5194/acp-24-12727-2024, https://doi.org/10.5194/acp-24-12727-2024, 2024
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Aiming to understand underlying patterns and trends in aerosols, we characterize the spatial patterns and long-term evolution of lower tropospheric aerosols by clustering multiple aerosol properties from preindustrial times to the year 2050 under three Shared
Socioeconomic Pathway scenarios. The results provide a clear and condensed picture of the spatial extent and distribution of aerosols for different time periods and emission scenarios.
Socioeconomic Pathway scenarios. The results provide a clear and condensed picture of the spatial extent and distribution of aerosols for different time periods and emission scenarios.
Yueming Cheng, Tie Dai, Junji Cao, Daisuke Goto, Jianbing Jin, Teruyuki Nakajima, and Guangyu Shi
Atmos. Chem. Phys., 24, 12643–12659, https://doi.org/10.5194/acp-24-12643-2024, https://doi.org/10.5194/acp-24-12643-2024, 2024
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In March 2021, east Asia experienced an outbreak of severe dust storms after an absence of 1.5 decades. Here, we innovatively used the time-lagged ground-based aerosol size information with the fixed-lag ensemble Kalman smoother to optimize dust emission and reproduce the dust storm. This work is valuable for not only the quantification of health damage, aviation risks, and profound impacts on the Earth's system but also revealing the climatic driving force and the process of desertification.
Marc Mallet, Aurore Voldoire, Fabien Solmon, Pierre Nabat, Thomas Drugé, and Romain Roehrig
Atmos. Chem. Phys., 24, 12509–12535, https://doi.org/10.5194/acp-24-12509-2024, https://doi.org/10.5194/acp-24-12509-2024, 2024
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This study investigates the interactions between smoke aerosols and climate in tropical Africa using a coupled ocean–atmosphere–aerosol climate model. The work shows that smoke plumes have a significant impact by increasing the low-cloud fraction, decreasing the ocean and continental surface temperature and reducing the precipitation of coastal western Africa. It also highlights the role of the ocean temperature response and its feedbacks for the September–November season.
Jia Liu, Cancan Zhu, Donghui Zhou, and Jinbao Han
Atmos. Chem. Phys., 24, 12341–12354, https://doi.org/10.5194/acp-24-12341-2024, https://doi.org/10.5194/acp-24-12341-2024, 2024
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The hydrophilic coatings of aged black carbon (BC) particles absorb moisture during the hygroscopic growth process, but it is difficult to characterize how much water is absorbed under different relative humidities (RHs). In this study, we propose a method to obtain the water content in the coatings based on the equivalent complex refractive index retrieved from optical properties. This method is verified from a theoretical perspective, and it performs well for thickly coated BC at high RHs.
Zijun Li, Angela Buchholz, and Noora Hyttinen
Atmos. Chem. Phys., 24, 11717–11725, https://doi.org/10.5194/acp-24-11717-2024, https://doi.org/10.5194/acp-24-11717-2024, 2024
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Evaluating organosulfur (OS) hygroscopicity is important for assessing aerosol–cloud climate interactions in the post-fossil-fuel future, when SO2 emissions decrease and OS compounds become increasingly important. Here a state-of-the-art quantum-chemistry-based method was used to predict the hygroscopic growth factors (HGFs) of a group of atmospherically relevant OS compounds and their mixtures with (NH4)2SO4. A good agreement was observed between their model-estimated and experimental HGFs.
Jamie R. Banks, Bernd Heinold, and Kerstin Schepanski
Atmos. Chem. Phys., 24, 11451–11475, https://doi.org/10.5194/acp-24-11451-2024, https://doi.org/10.5194/acp-24-11451-2024, 2024
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The Aralkum is a new desert in Central Asia formed by the desiccation of the Aral Sea. This has created a source of atmospheric dust, with implications for the balance of solar and thermal radiation. Simulating these effects using a dust transport model, we find that Aralkum dust adds radiative cooling effects to the surface and atmosphere on average but also adds heating events. Increases in surface pressure due to Aralkum dust strengthen the Siberian High and weaken the summer Asian heat low.
Xinyue Shao, Minghuai Wang, Xinyi Dong, Yaman Liu, Wenxiang Shen, Stephen R. Arnold, Leighton A. Regayre, Meinrat O. Andreae, Mira L. Pöhlker, Duseong S. Jo, Man Yue, and Ken S. Carslaw
Atmos. Chem. Phys., 24, 11365–11389, https://doi.org/10.5194/acp-24-11365-2024, https://doi.org/10.5194/acp-24-11365-2024, 2024
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Highly oxygenated organic molecules (HOMs) play an important role in atmospheric new particle formation (NPF). By semi-explicitly coupling the chemical mechanism of HOMs and a comprehensive nucleation scheme in a global climate model, the updated model shows better agreement with measurements of nucleation rate, growth rate, and NPF event frequency. Our results reveal that HOM-driven NPF leads to a considerable increase in particle and cloud condensation nuclei burden globally.
Anderson Da Silva, Louis Marelle, Jean-Christophe Raut, Yvette Gramlich, Karolina Siegel, Sophie L. Haslett, Claudia Mohr, and Jennie L. Thomas
EGUsphere, https://doi.org/10.5194/egusphere-2024-2839, https://doi.org/10.5194/egusphere-2024-2839, 2024
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Particles sources in polar climates are unclear, affecting climate representation in models. This study introduces an evaluated method for tracking particles with backtrajectory modeling. Tests on simulated particles allowed to show that traditional detection methods often misidentify sources. An improved method that accurately traces origins of aerosol particles in the Arctic is presented. The study recommends using this enhanced method for better source identification of atmospheric species.
Stuart Evans
EGUsphere, https://doi.org/10.5194/egusphere-2024-2820, https://doi.org/10.5194/egusphere-2024-2820, 2024
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This study of the North American Great Plains identifies the various weather patterns responsible for blowing dust in all parts of the region using a weather pattern classification. In the southwest plains passing cold fronts are the primary cause of dust; in the understudied northern plains, summertime patterns and southerly pre-frontal winds are most important in the west and east, respectively. These results are valuable to understanding and forecasting dust in this complex source region.
Falei Xu, Shuang Wang, Yan Li, and Juan Feng
Atmos. Chem. Phys., 24, 10689–10705, https://doi.org/10.5194/acp-24-10689-2024, https://doi.org/10.5194/acp-24-10689-2024, 2024
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This study examines how the winter North Atlantic Oscillation (NAO) and El Niño–Southern Oscillation (ENSO) affect dust activities in North China during the following spring. The results show that the NAO and ENSO, particularly in their negative phases, greatly influence dust activities. When both are negative, their combined effect on dust activities is even greater. This research highlights the importance of these climate patterns in predicting spring dust activities in North China.
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff
Atmos. Chem. Phys., 24, 10617–10637, https://doi.org/10.5194/acp-24-10617-2024, https://doi.org/10.5194/acp-24-10617-2024, 2024
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Our study unravels how stagnant winter conditions elevate aerosol levels in Stuttgart. Cloud cover at night plays a pivotal role, impacting morning air quality. Validating a key model, our findings aid accurate air quality predictions, crucial for effective pollution mitigation in urban areas.
Giorgio Veratti, Alessandro Bigi, Michele Stortini, Sergio Teggi, and Grazia Ghermandi
Atmos. Chem. Phys., 24, 10475–10512, https://doi.org/10.5194/acp-24-10475-2024, https://doi.org/10.5194/acp-24-10475-2024, 2024
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In a study of two consecutive winter seasons, we used measurements and modelling tools to identify the levels and sources of black carbon pollution in a medium-sized urban area of the Po Valley, Italy. Our findings show that biomass burning and traffic-related emissions (especially from Euro 4 diesel cars) significantly contribute to BC concentrations. This research offers crucial insights for policymakers and urban planners aiming to improve air quality in cities.
Pascal Lemaitre, Arnaud Quérel, Alexis Dépée, Alice Guerra Devigne, Marie Monier, Thibault Hiron, Chloé Soto Minguez, Daniel Hardy, and Andrea Flossmann
Atmos. Chem. Phys., 24, 9713–9732, https://doi.org/10.5194/acp-24-9713-2024, https://doi.org/10.5194/acp-24-9713-2024, 2024
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A new in-cloud scavenging scheme is proposed. It is based on a microphysical model of cloud formation and may be applied to long-distance atmospheric transport models (> 100 km) and climatic models. This model is applied to the two most extreme precipitating cloud types in terms of both relative humidity and vertical extension: cumulonimbus and stratus.
Alex Rowell, James Brean, David C. S. Beddows, Tuukka Petäjä, Máté Vörösmarty, Imre Salma, Jarkko V. Niemi, Hanna E. Manninen, Dominik van Pinxteren, Thomas Tuch, Kay Weinhold, Zongbo Shi, and Roy M. Harrison
Atmos. Chem. Phys., 24, 9515–9531, https://doi.org/10.5194/acp-24-9515-2024, https://doi.org/10.5194/acp-24-9515-2024, 2024
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Different sources of airborne particles in the atmospheres of four European cities were distinguished by recognising their particle size distributions using a statistical procedure, positive matrix factorisation. The various sources responded differently to the changes in emissions associated with COVID-19 lockdowns, and the reasons are investigated. While traffic emissions generally decreased, particles formed from reactions of atmospheric gases decreased in some cities but increased in others.
Amy H. Peace, Ying Chen, George Jordan, Daniel G. Partridge, Florent Malavelle, Eliza Duncan, and Jim M. Haywood
Atmos. Chem. Phys., 24, 9533–9553, https://doi.org/10.5194/acp-24-9533-2024, https://doi.org/10.5194/acp-24-9533-2024, 2024
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Natural aerosols from volcanic eruptions can help us understand how anthropogenic aerosols modify climate. We use observations and model simulations of the 2014–2015 Holuhraun eruption plume to examine aerosol–cloud interactions in September 2014. We find a shift to clouds with smaller, more numerous cloud droplets in the first 2 weeks of the eruption. In the third week, the background meteorology and previous conditions experienced by air masses modulate the aerosol perturbation to clouds.
Hua Lu, Min Xie, Bingliang Zhuang, Danyang Ma, Bojun Liu, Yangzhihao Zhan, Tijian Wang, Shu Li, Mengmeng Li, and Kuanguang Zhu
Atmos. Chem. Phys., 24, 8963–8982, https://doi.org/10.5194/acp-24-8963-2024, https://doi.org/10.5194/acp-24-8963-2024, 2024
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To identify cloud, aerosol, and planetary boundary layer (PBL) interactions from an air quality perspective, we summarized two pollution patterns characterized by denser liquid cloud and by obvious cloud radiation interaction (CRI). Numerical simulation experiments showed CRI could cause a 50 % reduction in aerosol radiation interaction (ARI) under a low-trough system. The results emphasized the nonnegligible role of CRI and its inhibition of ARI under wet and cloudy pollution synoptic patterns.
Huiyun Du, Jie Li, Xueshun Chen, Gabriele Curci, Fangqun Yu, Yele Sun, Xu Dao, Song Guo, Zhe Wang, Wenyi Yang, Lianfang Wei, and Zifa Wang
EGUsphere, https://doi.org/10.5194/egusphere-2024-1432, https://doi.org/10.5194/egusphere-2024-1432, 2024
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Inadequate consideration of mixing state and coatings on BC hinders aerosol radiation forcing quantification. While core-shell mixing results match observations closely, partial internal mixing and coating are more realistic. The fraction of embedded BC and coating aerosols resolved by a microphysics module were used to constrain the mixing state. This led to a 30~43 % absorption enhancement decrease over Northern China, offering valuable insights for the assessment of BC's radiative effects.
Emilie Fons, Ann Kristin Naumann, David Neubauer, Theresa Lang, and Ulrike Lohmann
Atmos. Chem. Phys., 24, 8653–8675, https://doi.org/10.5194/acp-24-8653-2024, https://doi.org/10.5194/acp-24-8653-2024, 2024
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Aerosols can modify the liquid water path (LWP) of stratocumulus and, thus, their radiative effect. We compare storm-resolving model and satellite data that disagree on the sign of LWP adjustments and diagnose this discrepancy with causal inference. We find that strong precipitation, the absence of wet scavenging, and cloud deepening under a weak inversion contribute to positive LWP adjustments to aerosols in the model, despite weak negative effects from cloud-top entrainment enhancement.
Muhammed Irfan, Thomas Kühn, Taina Yli-Juuti, Anton Laakso, Eemeli Holopainen, Douglas R. Worsnop, Annele Virtanen, and Harri Kokkola
Atmos. Chem. Phys., 24, 8489–8506, https://doi.org/10.5194/acp-24-8489-2024, https://doi.org/10.5194/acp-24-8489-2024, 2024
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The study examines how the volatility of semi-volatile organic compounds affects secondary organic aerosol (SOA) formation and climate. Our simulations show that uncertainties in these volatilities influence aerosol mass and climate impacts. Accurate representation of these compounds in climate models is crucial for predicting global climate patterns.
Zhixin Xue, Nair Udaysankar, and Sundar Christopher
EGUsphere, https://doi.org/10.5194/egusphere-2024-1781, https://doi.org/10.5194/egusphere-2024-1781, 2024
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Canadian wildfires degrade US air quality through long-range smoke transport. This study uses surface, satellite, and numerical models to assess the PM2.5 increase due to Canadian fires during 2018 fire season. Satellite data, often limited by cloud cover, was supplemented with high-resolution simulated data to fill gaps. Weather systems significantly influenced smoke movement. Canadian fires led to a notable rise in PM2.5 levels across various US regions during the 2018 summer wildfire events.
Alkiviadis Kalisoras, Aristeidis K. Georgoulias, Dimitris Akritidis, Robert J. Allen, Vaishali Naik, Chaincy Kuo, Sophie Szopa, Pierre Nabat, Dirk Olivié, Twan van Noije, Philippe Le Sager, David Neubauer, Naga Oshima, Jane Mulcahy, Larry W. Horowitz, and Prodromos Zanis
Atmos. Chem. Phys., 24, 7837–7872, https://doi.org/10.5194/acp-24-7837-2024, https://doi.org/10.5194/acp-24-7837-2024, 2024
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Effective radiative forcing (ERF) is a metric for estimating how human activities and natural agents change the energy flow into and out of the Earth’s climate system. We investigate the anthropogenic aerosol ERF, and we estimate the contribution of individual processes to the total ERF using simulations from Earth system models within the Coupled Model Intercomparison Project Phase 6 (CMIP6). Our findings highlight that aerosol–cloud interactions drive ERF variability during the last 150 years.
Qianqian Song, Paul Ginoux, María Gonçalves Ageitos, Ron L. Miller, Vincenzo Obiso, and Carlos Pérez García-Pando
Atmos. Chem. Phys., 24, 7421–7446, https://doi.org/10.5194/acp-24-7421-2024, https://doi.org/10.5194/acp-24-7421-2024, 2024
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We implement and simulate the distribution of eight dust minerals in the GFDL AM4.0 model. We found that resolving the eight minerals reduces dust absorption compared to the homogeneous dust used in the standard GFDL AM4.0 model that assumes a globally uniform hematite content of 2.7 % by volume. Resolving dust mineralogy results in significant impacts on radiation, land surface temperature, surface winds, and precipitation over North Africa in summer.
Senyi Kong, Zheng Wang, and Lei Bi
Atmos. Chem. Phys., 24, 6911–6935, https://doi.org/10.5194/acp-24-6911-2024, https://doi.org/10.5194/acp-24-6911-2024, 2024
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The retrieval of refractive indices of dust aerosols from laboratory optical measurements is commonly done assuming spherical particles. This paper aims to investigate the uncertainties in the shortwave refractive indices and corresponding optical properties by considering non-spherical and inhomogeneous models for dust samples. The study emphasizes the significance of using non-spherical models for simulating dust aerosols.
Wenxuan Hua, Sijia Lou, Xin Huang, Lian Xue, Ke Ding, Zilin Wang, and Aijun Ding
Atmos. Chem. Phys., 24, 6787–6807, https://doi.org/10.5194/acp-24-6787-2024, https://doi.org/10.5194/acp-24-6787-2024, 2024
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In this study, we diagnose uncertainties in carbon monoxide and organic carbon emissions from four inventories for seven major wildfire-prone regions. Uncertainties in vegetation classification methods, fire detection products, and cloud obscuration effects lead to bias in these biomass burning (BB) emission inventories. By comparing simulations with measurements, we provide certain inventory recommendations. Our study has implications for reducing uncertainties in emissions in further studies.
Chandrakala Bharali, Mary Barth, Rajesh Kumar, Sachin D. Ghude, Vinayak Sinha, and Baerbel Sinha
Atmos. Chem. Phys., 24, 6635–6662, https://doi.org/10.5194/acp-24-6635-2024, https://doi.org/10.5194/acp-24-6635-2024, 2024
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This study examines the role of atmospheric aerosols in winter fog over the Indo-Gangetic Plains of India using WRF-Chem. The increase in RH with aerosol–radiation feedback (ARF) is found to be important for fog formation as it promotes the growth of aerosols in the polluted environment. Aqueous-phase chemistry in the fog increases PM2.5 concentration, further affecting ARF. ARF and aqueous-phase chemistry affect the fog intensity and the timing of fog formation by ~1–2 h.
Wenxin Zhao, Yu Zhao, Yu Zheng, Dong Chen, Jinyuan Xin, Kaitao Li, Huizheng Che, Zhengqiang Li, Mingrui Ma, and Yun Hang
Atmos. Chem. Phys., 24, 6593–6612, https://doi.org/10.5194/acp-24-6593-2024, https://doi.org/10.5194/acp-24-6593-2024, 2024
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We evaluate the long-term (2000–2020) variabilities of aerosol absorption optical depth, black carbon emissions, and associated health risks in China with an integrated framework that combines multiple observations and modeling techniques. We demonstrate the remarkable emission abatement resulting from the implementation of national pollution controls and show how human activities affected the emissions with a spatiotemporal heterogeneity, thus supporting differentiated policy-making by region.
Peng Xian, Jeffrey S. Reid, Melanie Ades, Angela Benedetti, Peter R. Colarco, Arlindo da Silva, Tom F. Eck, Johannes Flemming, Edward J. Hyer, Zak Kipling, Samuel Rémy, Tsuyoshi Thomas Sekiyama, Taichu Tanaka, Keiya Yumimoto, and Jianglong Zhang
Atmos. Chem. Phys., 24, 6385–6411, https://doi.org/10.5194/acp-24-6385-2024, https://doi.org/10.5194/acp-24-6385-2024, 2024
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The study compares and evaluates monthly AOD of four reanalyses (RA) and their consensus (i.e., ensemble mean). The basic verification characteristics of these RA versus both AERONET and MODIS retrievals are presented. The study discusses the strength of each RA and identifies regions where divergence and challenges are prominent. The RA consensus usually performs very well on a global scale in terms of how well it matches the observational data, making it a good choice for various applications.
Roger Teoh, Zebediah Engberg, Ulrich Schumann, Christiane Voigt, Marc Shapiro, Susanne Rohs, and Marc E. J. Stettler
Atmos. Chem. Phys., 24, 6071–6093, https://doi.org/10.5194/acp-24-6071-2024, https://doi.org/10.5194/acp-24-6071-2024, 2024
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The radiative forcing (RF) due to aviation contrails is comparable to that caused by CO2. We estimate that global contrail net RF in 2019 was 62.1 mW m−2. This is ~1/2 the previous best estimate for 2018. Contrail RF varies regionally due to differences in conditions required for persistent contrails. COVID-19 reduced contrail RF by 54% in 2020 relative to 2019. Globally, 2 % of all flights account for 80 % of the annual contrail energy forcing, suggesting a opportunity to mitigate contrail RF.
Haotian Zu, Biwu Chu, Yiqun Lu, Ling Liu, and Xiuhui Zhang
Atmos. Chem. Phys., 24, 5823–5835, https://doi.org/10.5194/acp-24-5823-2024, https://doi.org/10.5194/acp-24-5823-2024, 2024
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The nucleation of iodic acid (HIO3) and iodous acid (HIO2) was proven to be critical in marine areas. However, HIO3–HIO2 nucleation cannot effectively derive the rapid nucleation in some polluted coasts. We find a significant enhancement of dimethylamine (DMA) on the HIO3–HIO2 nucleation in marine and polar regions with abundant DMA sources, which may establish reasonable connections between the HIO3–HIO2 nucleation and the rapid formation of new particles in polluted marine and polar regions.
Junghwa Lee, Patric Seifert, Tempei Hashino, Maximilian Maahn, Fabian Senf, and Oswald Knoth
Atmos. Chem. Phys., 24, 5737–5756, https://doi.org/10.5194/acp-24-5737-2024, https://doi.org/10.5194/acp-24-5737-2024, 2024
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Spectral bin model simulations of an idealized supercooled stratiform cloud were performed with the AMPS model for variable CCN and INP concentrations. We performed radar forward simulations with PAMTRA to transfer the simulations into radar observational space. The derived radar reflectivity factors were compared to observational studies of stratiform mixed-phase clouds. These studies report a similar response of the radar reflectivity factor to aerosol perturbations as we found in our study.
Cited articles
Abo Riziq, A., Erlick, C., Dinar, E., and Rudich, Y.: Optical properties of
absorbing and non-absorbing aerosols retrieved by cavity ring down (CRD)
spectroscopy, Atmos. Chem. Phys., 7, 1523–1536,
https://doi.org/10.5194/acp-7-1523-2007, 2007.
Adachi, K. and Buseck, P. R.: Internally mixed soot, sulfates, and organic matter in
aerosol particles from Mexico City, Atmos. Chem. Phys., 8, 6469–6481, https://doi.org/10.5194/acp-8-6469-2008, 2008.
Alexander, D. T. L., Crozier, P. A., and Anderson, J. R.: Brown Carbon
Spheres in East Asian Outflow and their Optical Properties, Science, 321,
833–836, 2008.
Aouizerats, B., Thouron, O., Tulet, P., Mallet, M., Gomes, L., and Henzing,
J. S.: Development of an online radiative module for the computation of
aerosol optical properties in 3-D atmospheric models: validation during the
EUCAARI campaign, Geosci. Model Dev., 3, 553–564,
https://doi.org/10.5194/gmd-3-553-2010, 2010.
Bond, T. C. and Bergstrom, R. W.: Light absorption by carbonaceous particles:
an investigative review, Aerosol Sci. Technol., 40, 27–67, 2006.
Bond, T. C., Habib, G., and Bergstrom, R. W.: Limitations in the enhancement
of visible light absorption due to mixing state, J. Geophys. Res., 111,
D20211, https://doi.org/10.1029/2006JD007315, 2006.
Bond, T. C., Doherty, S. J., Fahey, D. W., Forster, P. M., Berntsen, T.,
DeAngelo, B. J., Flanner, M. G., Ghan, S., Kaercher, B., Koch, D., Kinne,
S., Kondo, Y., Quinn, P. K., Sarofim, M. C., Schultz, M. G., Schulz, M.,
Venkataraman, C., Zhang, H., Zhang, S., Bellouin, N., Guttikunda, S. K.,
Hopke, P. K., Jacobson, M. Z., Kaiser, J. W., Klimont, Z., Lohmann, U.,
Schwarz, J. P., Shindell, D., Storelvmo, T., Warren, S. G., and Zender, C.
S.: Bounding the role of black carbon in the climate system: A scientific
assessment, J. Geophys. Res., 118, 5380–5552, 2013.
Chen, B., Bai, Z., Cui, X., Chen, J., Andersson, A., and Gustafsson, O.:
Light absorption enhancement of black carbon from urban haze in Northern
China winter, Environ. Pollut., 221, 418–426, 2017.
Coz, E. and Leck, C.: Morphology and state of mixture of atmospheric soot
aggregates during the winter season over Southern Asia–a quantitative
approach, Tellus B, 63, 107–116, 2011.
Cui, X., Wang, X., Yang, L., Chen, B., Chen, J., Andersson, A., and Gustafsson, O.: Radiative absorption enhancement from coatings on black carbon aerosols, Sci. Total. Environ., 551–552, 51–56, 2016.
Dlugach, J. M. and Mishchenko, M. I.: Scattering properties of
heterogeneous mineral aerosols with absorbing inclussions, J. Quant.
Spectrosc. Rad. Transf., 162, 89–94, 2015.
Dong, J., Zhao, J. M., and Liu, L. H.: Morphological effects on the
radiative properties of soot aerosols in different internally mixing states
with sulfate, J. Quant. Spectrosc. Rad. Transf., 165, 43–55, 2015.
He, C., Liou, K.-N., Takano, Y., Zhang, R., Levy Zamora, M., Yang, P., Li,
Q., and Leung, L. R.: Variation of the radiative properties during black
carbon aging: theoretical and experimental intercomparison, Atmos. Chem.
Phys., 15, 11967–11980, https://doi.org/10.5194/acp-15-11967-2015, 2015.
Kandler, K., Schutz, L., Deutscher, C., Ebert, M., Hofmann, H., Jackel, S.,
Jaenicke, R., Knippertz, P., Lieke, K., Massling, A., Petzold, A., Schladitz,
A., Weinzierl, B., Wiedensohler, A., Zorn, S., and Weinbruch, S.: Size
distribution, mass concentration, chemical and mineralogical composition and
derived optical parameters of the boundary layer aerosol at Tinfou, Morocco,
during SAMUM 2006, Tellus B, 61, 32–50, 2009.
Kim, D., Wang, C., Ekman, A. M. L., Barth, M. C., and Rasch, P. J.:
Distribution and direct radiative forcing of carbonaceous and sulfate
aerosols in an interactive size-resolving aerosol–climate model, J.
Geophys. Res., 113, D16309, https://doi.org/10.1029/2007JD009756, 2008.
Li, W., Sun, J., Xu, L., Shi, Z., Riemer, N., Sun, Y., Fu, P., Zhang, J.,
Lin, Y., Wang, X., Shao, L., Chen, J., Zhang, X., Wang, Z., and Wang, W.: A
conceptual framework for mixing structures in individual aerosol particles,
J. Geophys. Res., 121, 13784–13798, 2016.
Liu, C., Li, J., Yin, Y., Zhu, B., and Feng, Q.: Optical properties of black
carbon aggregates with non-absorptive coating, J. Quant. Spectrosc. Rad.
Transf., 187, 443–452, 2017.
Liu, D., Taylor, J. W., Young, D. E., Flynn, M. J., Coe, H., and Allan, J.
D.: The effect of complex black carbon microphysics on the determination of
the optical properties of brown carbon, Geophys. Res. Lett., 42, 613–619,
2015.
Liu, D., Whitehead, J., Alfarra, M. R., Reyes-Villegas, E., Spracklen, D.
V., Reddington, C. L., Kong, S., Williams, P. I., Ting, Y.-C., Haslett, S.,
Taylor, J. W., Flynn, M. J., Morgan, W. T., McFiggans, G., Coe, H., and
Allan, J. D.: Black-carbon absorption enhancement in the atmosphere
determined by particle mixing state, Nat. Geosci., 10, 184–188, 2017.
Liu, F., Yon, J., and Bescond, A.: On the radiative properties of soot
aggregates – Part2: effects of coating, J. Quant. Spectrosc. Rad. Transf.,
172, 134–145, 2015.
Liu, L. and Mishchenko, M. I.: Scattering and radiative properties of complex
soot and soot-containing aggregate particles, J. Quant. Spectrosc. Rad.
Transf., 106, 262–273, 2007.
Liu, L., Mishchenko, M. I., and Arnott, W. P.: A study of radiative
properties of fractal soot aggregates using the superposition T-matrix
method, J. Quant. Spectrosc. Rad. Transf., 109, 2656–2663, 2008.
Mack, L. A., Levin, E. J. T., Kreidenweis, S. M., Obrist, D., Moosmüller, H.,
Lewis, K. A., Arnott, W. P., McMeeking, G. R., Sullivan, A. P., Wold, C. E.,
Hao, W.-M., Collett Jr., J. L., and Malm, W. C.: Optical closure experiments
for biomass smoke aerosols, Atmos. Chem. Phys., 10, 9017–9026,
https://doi.org/10.5194/acp-10-9017-2010, 2010.
Mackowski, D. W.: A general superposition solution for electromagnetic
scattering by multiple spherical domains of optically active media, J.
Quant. Spectrosc. Rad. Transf., 133, 264–270, 2014.
Marley, N. A., Gaffney, J. S., Baird, J. C., Blazer, C. A., Drayton, P. J., and Frederick, J. E.: An Empirical Method for the Determination of the Complex Refractive Index of Size-Fractionated Atmospheric Aerosols for Radiative Transfer Calculations, Aerosol Sci. Technol., 34, 535–549, 2001.
Mishchenko, M. I., Dlugach, J. M., Yurkin, M. A., Bi, L., Cairns, B., Liu,
L., Panetta, L. R., Travis, L., Yang, P., and Zakharova, N.:
First-principles modeling of electromagnetic scattering by discrete and
discretely heterogeneous random media, Phys. Rep., 632, 1–75, 2016.
Muller, D., Weinzierl, B., Petzold, A., Kandler, K., Ansmann, A., Muller,
T., Tesche, M., Freudenthaler, V., Esselborn, M., Heese, B., Althausen, D.,
Schladitz, A., Otto, S., and Knippertz, P.: Mineral dust observed with
AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM
2006: Shape-independent particle properties, J. Geophys. Res., 115, D07202,
https://doi.org/10.1029/2009JD012520, 2010.
Muller, T., Schladitz, A., Massling, A., Kaaden, N., Kandler, K., and
Wiedensohler, A.: Spectral absorption coefficients and imaginary parts of
refractive indices of Saharan dust during SAMUM-1, Tellus B, 61, 79–95,
2009.
Myhre, G.: Consistency between satellite-derived and modeled estimates of
the direct aerosol effect, Science, 325, 187–190, 2009.
Peng, J., Hua, M., Guo, S., Du, Z., Zheng, J., Shang, D., Zamora, M. L.,
Zeng, L., Shao, M., Wu, Y., Zheng, J., Wang, Y., Glen, C. R., Collins, D.
R., Molina, M. J., and Zhang, R.: Markedly enhanced absorption and direct
radiative forcing of black carbon under polluted urban environments, P.
Natl. Acad. Sci. USA, 113, 4266–4271, 2016.
Petzold, A., Rasp, K., Weinzierl, B., Esselborn, M., Hamburger, T.,
Dornbrack, A., Kandler, K., Schutz, L., Knippertz, P., Fiebig, M., and
Virkkula, A.: Saharan dust absorption and refractive index from
aircraft-based observations during SAMUM 2006, Tellus B, 61, 118–130, 2009.
Radney, J. G., You, R., Ma, X., Conny, J. M., Zachariah, M. R., Hodges, J.
T., and Zangmeister, C. D.: Dependence of soot optical properties on
particle morphology: measurement and model comparisons, Environ. Sci.
Technol., 48, 3169–3176, 2014.
Ramanathan, V. and Carmichael, G.: Global and regional climate changes due
to black carbon, Nat. Geosci., 1, 221–227, 2008.
Raut, J.-C. and Chazette, P.: Radiative budget in the presence of
multi-layered aerosol structures in the framework of AMMA SOP-0, Atmos. Chem.
Phys., 8, 6839–6864, https://doi.org/10.5194/acp-8-6839-2008, 2008a.
Raut, J.-C. and Chazette, P.: Vertical profiles of urban aerosol complex
refractive index in the frame of ESQUIF airborne measurements, Atmos. Chem.
Phys., 8, 901–919, https://doi.org/10.5194/acp-8-901-2008, 2008b.
Roelofs, G.-J., ten Brink, H., Kiendler-Scharr, A., de Leeuw, G., Mensah, A.,
Minikin, A., and Otjes, R.: Evaluation of simulated aerosol properties with
the aerosol-climate model ECHAM5-HAM using observations from the IMPACT field
campaign, Atmos. Chem. Phys., 10, 7709–7722,
https://doi.org/10.5194/acp-10-7709-2010, 2010.
Schkolnik, G., Chand, D., Hoffer, A., Andreae, M. O., Erlick, C.,
Swietlicki, E., and Rudich, Y.: Constraining the density and complex
refractive index of elemental and organic carbon in biomass burning aerosol
using optical and chemical measurements, Atmos. Environ., 41, 1107–1118,
2007.
Schnaiter, M., Linke, C., Mohler, O., Naumann, K.-H., Saathoff, H., Wagner, R., Schurath, U., and Wehner, B.: Absorption amplification of black carbon internally mixed with secondary organic aerosol, J. Geophys. Res., 110, D19204, https://doi.org/10.1029/2005JD006046, 2005.
Schwarz, J. P., Gao, R. S., Spackman, J. R., Watts, L. A., Thomson, D. S.,
Fahey, D. W., Ryerson, T. B., Peisch, J., Holloway, J. S., Trainer, M.,
Frost, G. J., Baynard, T., Lack, D. A., de Gouw, J. A., Warneke, C., and Del
Negro, L. A.: Measurement of the mixing state, mass, and optical size of
individual black carbon particles in urban and biomass burning emissions,
Geophys. Res. Lett., 35, L13810, https://doi.org/10.1029/2008GL033968, 2008a.
Schwarz, J. P., Spackman, J. R., Fahey, D. W., Gao, R. S., Lohmann, U.,
Stier, P., Watts, L. A., Thomson, D. S., Lack, D. A., Pfister, L., Mahoney,
M. J., Baumgardner, D., Wilson, J. C., and Reeves, J. M.: Coatings and their
enhancement of black carbon light absorption in the tropical atmosphere, J.
Geophys. Res., 113, D03203, https://doi.org/10.1029/2007jd009042, 2008b.
Shiraiwa, M., Kondo, Y., Iwamoto, T., and Kita, K.: Amplification of light
absorption of black carbon by organic coating, Aerosol Sci. Technol., 44,
46–54, 2010.
Skorupski, K., Mroczka, J., Wriedt, T., and Riefler, N.: A fast and accurate
implementation of tunable algorithms used for generation of fractal-like
aggregate models, Physica A, 404, 106–117, 2014.
Sorensen, C. M.: Light scattering by fractal aggregates: A review, Aerosol
Sci. Technol., 35, 648–687, 2001.
Stier, P., Feichter, J., Kinne, S., Kloster, S., Vignati, E., Wilson, J.,
Ganzeveld, L., Tegen, I., Werner, M., Balkanski, Y., Schulz, M., Boucher, O.,
Minikin, A., and Petzold, A.: The aerosol-climate model ECHAM5-HAM, Atmos.
Chem. Phys., 5, 1125–1156, https://doi.org/10.5194/acp-5-1125-2005, 2005.
Stock, M., Cheng, Y. F., Birmili, W., Massling, A., Wehner, B., Müller, T.,
Leinert, S., Kalivitis, N., Mihalopoulos, N., and Wiedensohler, A.:
Hygroscopic properties of atmospheric aerosol particles over the Eastern
Mediterranean: implications for regional direct radiative forcing under clean
and polluted conditions, Atmos. Chem. Phys., 11, 4251–4271,
https://doi.org/10.5194/acp-11-4251-2011, 2011.
Tritscher, T., Juranyi, Z., Martin, M., Chirico, R., Gysel, M., Heringa, M.
F., DeCarlo, P. F., Sierau, B., Prevot, A. S. H., Weingartner, E., and
Baltensperger, U.: Changes of hygroscopicity and morphology during ageing of
diesel soot, Environ. Res. Lett., 6, 034026, https://doi.org/10.1088/1748-9326/6/3/034026, 2011.
Voshchinnikov, N. V., Videen, G., and Henning, T.: Effective medium theories for
irregular fluffy structures: aggregation of small particles, Appl. Opt.,
46, 4065–4072, 2007.
Wang, Y., Liu, F., He, C., Bi, L., Cheng, T., Wang, Z., Zhang, H., Zhang, X.,
Shi, Z., and Li, W.: Fractal Dimensions and Mixing Structures of Soot
Particles during Atmospheric Processing, Environ. Sci. Technol. Lett., 4,
487–493, 2017.
Wu, Y., Cheng, T. H., Zheng, L. J., and Chen, H.: Optical properties of the
semi-external mixture composed of sulfate particle and different quantities
of soot aggregates, J. Quant. Spectrosc. Rad. Transf., 179, 139–148,
2016.
Yurkin, M. A. and Hoekstra, A. G.: The discrete dipole approximation: an
overview and recent developments, J. Quant. Spectrosc. Rad. Transf.,
106, 558–589, 2007.
Zhang, K., O'Donnell, D., Kazil, J., Stier, P., Kinne, S., Lohmann, U.,
Ferrachat, S., Croft, B., Quaas, J., Wan, H., Rast, S., and Feichter, J.: The
global aerosol-climate model ECHAM-HAM, version 2: sensitivity to
improvements in process representations, Atmos. Chem. Phys., 12, 8911–8949,
https://doi.org/10.5194/acp-12-8911-2012, 2012.
Zhang, R., Khalizov, A. F., Pagels, J., Zhang, D., Xue, H., and McMurry, P.
H.: Variability in morphology, hygroscopicity, and optical properties of
soot aerosols during atmospheric processing, P. Natl. Acad. Sci. USA,
105, 10291–10296, 2008.
Zhang, X.: GitHub: Data for ACP 2018-1279, available at: https://github.com/xiaolinzhang/Data_FOR_ACP-2018-1279, last access:
19 May, 2019.
Zhang, X. and Mao, M.: Brown haze types due to aerosol pollution at Hefei
in the summer and fall, Chemosphere, 119, 1153–1162, 2015.
Zhang, X., Huang, Y., Rao, R., and Wang, Z.: Retrieval of effective complex
refractive index from intensive measurements of characteristics of ambient
aerosols in the boundary layer, Opt. Express, 21, 17849–17862, 2013.
Zhang, X., Mao, M., Berg, M. J., and Sun, W.: Insight into wintertime
aerosol characteristics over Beijing, J. Atmos. Sol.-Terr. Phy., 121,
63–71, 2014.
Zhang, X., Rao, R., Huang, Y., Mao, M., Berg, M. J., and Sun, W.: Black
carbon aerosols in urban central China, J. Quant. Spectrosc. Rad.
Transf., 150, 3–11, 2015.
Zhang, X., Mao, M., Yin, Y., and Wang, B.: Absorption enhancement of aged
black carbon aerosols affected by their microphysics: A numerical
investigation, J. Quant. Spectrosc. Rad. Transf., 202, 90–97, 2017.
Zhang, X., Mao, M., Yin, Y., and Wang, B.: Numerical investigation on
absorption enhancement of black carbon aerosols partially coated with
nonabsorbing organics, J. Geophys. Res., 123, 1297–1308, 2018.
Zhang, Y., Zhang, Q., Cheng, Y., Su, H., Kecorius, S., Wang, Z., Wu, Z., Hu,
M., Zhu, T., Wiedensohler, A., and He, K.: Measuring the morphology and
density of internally mixed black carbon with SP2 and VTDMA: new insight into
the absorption enhancement of black carbon in the atmosphere, Atmos. Meas.
Tech., 9, 1833–1843, https://doi.org/10.5194/amt-9-1833-2016, 2016.
Short summary
The understanding of the exactly retrieved optically effective aerosol complex refractive index (ACRI) of aged BC affected by their microphysics is numerically evaluated. A simple new ACRI parameterization for heavily coated BC in coarse mode is then proposed. We suggest that, to produce reliable estimates of BC radiative forcing in aerosol–climate models, the optically effective ACRI, rather than the ACRI given by the VWA, appears to be essential, especially for coarse coated BC particles.
The understanding of the exactly retrieved optically effective aerosol complex refractive index...
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