Articles | Volume 16, issue 2
https://doi.org/10.5194/acp-16-777-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-16-777-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
25 Jan 2016
Research article |
| 25 Jan 2016
Impact of vehicular emissions on the formation of fine particles in the Sao Paulo Metropolitan Area: a numerical study with the WRF-Chem model
Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of Sao Paulo, Sao Paulo, Brazil
M. F. Andrade
Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of Sao Paulo, Sao Paulo, Brazil
Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences (FEPS), University of Surrey, Guilford GU2 7XH, UK
Environmental Flow (EnFlo) Research Centre, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, UK
R. Y. Ynoue
Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of Sao Paulo, Sao Paulo, Brazil
A. G. Muñoz
International Research Institute for Climate and Society (IRI), Columbia University, Palisades, NY 10964-1000, USA
Centro de Modelado Científico (CMC), Universidad del Zulia, Maracaibo, Venezuela
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The MUNICH model was used to calculate pollutant concentrations inside the streets of São Paulo. The VEIN emission model provided the vehicular emissions and the coordinates of the streets. We used information from an air quality station to account for pollutant concentrations over the street rooftops. Results showed that when emissions are calibrated, MUNICH satisfied the performance criteria. MUNICH can be used to evaluate the impact of traffic-related air pollution on public health.
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Two different available air quality modelling systems were used to investigate physical and chemical processes that contributed to increased daily background PM10 in all of Europe (focusing on eastern and central Europe). Differentiation of modelling performance in respect to the terrain height was found. A strong influence of meteorological conditions on increased background PM10 and statically stable atmospheric conditions were recognized as a key factor in the build-up of background PM10.
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São Paulo, Brazil, has relatively relaxed regulations for ambient air pollution standards and often presents high air pollution levels due to emissions of airborne particles from local sources and long-range transport of biomass burning smoke. High risks associated with particulate matter exposure were observed in most samples. The results highlighted the contribution of vehicular emissions and the significant input from biomass combustion in the dry season.
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Atmos. Chem. Phys., 16, 14635–14656, https://doi.org/10.5194/acp-16-14635-2016, https://doi.org/10.5194/acp-16-14635-2016, 2016
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The Metropolitan Area of São Paulo is the biggest megacity of South America, with over 20 million inhabitants. In recent years, the region has been facing a modification in rain patterns. In this study, we evaluated the effects of local and remote sources of air pollution on cloud-condensation nuclei activation properties. Our results showed that the local vehicular traffic emission products presented more negative effects on cloud-condensation nuclei activation than the remote sources.
Beatriz Sayuri Oyama, Maria de Fátima Andrade, Pierre Herckes, Ulrike Dusek, Thomas Röckmann, and Rupert Holzinger
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Vehicular emissions have a strong impact on air pollution in big cities; hence, the study was performed in São Paulo city, where light- (LDVs) and heavy-duty vehicles (HDVs) run on different fuels. We find that organic aerosol emission from LDVs and HDVs is a complex process involving oxidation of fuel constituents, NOx chemistry, and condensation of unburned fuel hydrocarbons on new or existing particles. The obtained emission patterns can be used to study processing of young aerosol in Brazil.
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Subject: Aerosols | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
Aerosol–meteorology feedback diminishes the transboundary transport of black carbon into the Tibetan Plateau
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Climate intervention using marine cloud brightening (MCB) compared with stratospheric aerosol injection (SAI) in the UKESM1 climate model
Comparison of six approaches to predicting droplet activation of surface active aerosol – Part 2: Strong surfactants
Increased importance of aerosol–cloud interactions for surface PM2.5 pollution relative to aerosol–radiation interactions in China with the anthropogenic emission reductions
The role of temporal scales in extracting dominant meteorological drivers of major airborne pollutants
Biomass-burning smoke's properties and its interactions with marine stratocumulus clouds in WRF-CAM5 and southeastern Atlantic field campaigns
Air pollution trapping in the Dresden Basin from gray-zone scale urban modeling
The effect of atmospherically relevant aminium salts on water uptake
The impact of aerosols on stratiform clouds over southern West Africa: a large-eddy-simulation study
Numerical simulation and evaluation of global ultrafine particle concentrations at the Earth's surface
New particle formation induced by anthropogenic-biogenic interactions in the southeastern Tibetan Plateau
Observationally constrained analysis of sulfur cycle in the marine atmosphere with NASA ATom measurements and AeroCom model simulations
The underappreciated role of transboundary pollution in future air quality and health improvements in China
The export of African mineral dust across the Atlantic and its impact over the Amazon Basin
Assimilation of POLDER observations to estimate aerosol emissions
Effect of radiation interaction and aerosol processes on ventilation and aerosol concentrations in a real urban neighbourhood in Helsinki
Atlantic Multidecadal Oscillation modulates the relationship between El Niño–Southern Oscillation and fire weather in Australia
Investigation of observed dust trends over the Middle East region in NASA GEOS Earth system model simulations
Assessing the Assimilation of Himawari-8 observations on Aerosol Forecasts and Radiative Effects During Pollution Transport from South Asia to the Tibetan Plateau
Identifying climate model structural inconsistencies allows for tight constraint of aerosol radiative forcing
Impacts of reducing scattering and absorbing aerosols on the temporal extent and intensity of South Asian summer monsoon and East Asian summer monsoon
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Jim M. Haywood, Andy Jones, Anthony C. Jones, Paul Halloran, and Philip J. Rasch
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Atmos. Chem. Phys., 23, 15149–15164, https://doi.org/10.5194/acp-23-15149-2023, https://doi.org/10.5194/acp-23-15149-2023, 2023
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Atmospheric aerosols act as seeds for cloud formation. Many aerosols contain surface active material that accumulates at the surface of growing droplets. This can affect cloud droplet activation, but the broad significance of the effect and the best way to model it are still debated. We compare predictions of six models to surface activity of strongly surface active aerosol and find significant differences between the models, especially with large fractions of surfactant in the dry particles.
Da Gao, Bin Zhao, Shuxiao Wang, Yuan Wang, Brian Gaudet, Yun Zhu, Xiaochun Wang, Jiewen Shen, Shengyue Li, Yicong He, Dejia Yin, and Zhaoxin Dong
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Miaoqing Xu, Jing Yang, Manchun Li, Xiao Chen, Qiancheng Lv, Qi Yao, Bingbo Gao, and Ziyue Chen
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Although the temporal-scale effects on PM2.5–meteorology associations have been discussed, no quantitative evidence has proved this before. Based on rare 3 h meteorology data, we revealed that the dominant meteorological factor for PM2.5 concentrations across China extracted at the 3 h and 24 h scales presented large variations. This research suggests that data sources of different temporal scales should be comprehensively considered for better attribution and prevention of airborne pollution.
Calvin Howes, Pablo E. Saide, Hugh Coe, Amie Dobracki, Steffen Freitag, Jim M. Haywood, Steven G. Howell, Siddhant Gupta, Janek Uin, Mary Kacarab, Chongai Kuang, L. Ruby Leung, Athanasios Nenes, Greg M. McFarquhar, James Podolske, Jens Redemann, Arthur J. Sedlacek, Kenneth L. Thornhill, Jenny P. S. Wong, Robert Wood, Huihui Wu, Yang Zhang, Jianhao Zhang, and Paquita Zuidema
Atmos. Chem. Phys., 23, 13911–13940, https://doi.org/10.5194/acp-23-13911-2023, https://doi.org/10.5194/acp-23-13911-2023, 2023
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Michael Weger and Bernd Heinold
Atmos. Chem. Phys., 23, 13769–13790, https://doi.org/10.5194/acp-23-13769-2023, https://doi.org/10.5194/acp-23-13769-2023, 2023
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This study investigates the effects of complex terrain on air pollution trapping using a numerical model which simulates the dispersion of emissions under real meteorological conditions. The additionally simulated aerosol age allows us to distinguish areas that accumulate aerosol over time from areas that are more influenced by fresh emissions. The Dresden Basin, a widened section of the Elbe Valley in eastern Germany, is selected as the target area in a case study to demonstrate the concept.
Noora Hyttinen
Atmos. Chem. Phys., 23, 13809–13817, https://doi.org/10.5194/acp-23-13809-2023, https://doi.org/10.5194/acp-23-13809-2023, 2023
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Water activity in aerosol particles describes how particles respond to variations in relative humidity. Here, water activities were calculated for a set of 80 salts that may be present in aerosol particles using a state-of-the-art quantum-chemistry-based method. The effect of the dissociated salt on water activity varies with both the cation and anion. Most of the studied salts increase water uptake compared to pure water-soluble organic particles.
Lambert Delbeke, Chien Wang, Pierre Tulet, Cyrielle Denjean, Maurin Zouzoua, Nicolas Maury, and Adrien Deroubaix
Atmos. Chem. Phys., 23, 13329–13354, https://doi.org/10.5194/acp-23-13329-2023, https://doi.org/10.5194/acp-23-13329-2023, 2023
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Low-level stratiform clouds (LLSCs) appear frequently over southern West Africa during the West African monsoon. Local and remote aerosol sources (biomass burning aerosols from central Africa) play a significant role in the LLSC life cycle. Based on measurements by the DACCIWA campaign, large-eddy simulation (LES) was conducted using different aerosol scenarios. The results show that both indirect and semi-direct effects can act individually or jointly to influence the life cycles of LLSCs.
Matthias Kohl, Jos Lelieveld, Sourangsu Chowdhury, Sebastian Ehrhart, Disha Sharma, Yafang Cheng, Sachchida Nand Tripathi, Mathew Sebastian, Govindan Pandithurai, Hongli Wang, and Andrea Pozzer
Atmos. Chem. Phys., 23, 13191–13215, https://doi.org/10.5194/acp-23-13191-2023, https://doi.org/10.5194/acp-23-13191-2023, 2023
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Knowledge on atmospheric ultrafine particles (UFPs) with a diameter smaller than 100 nm is crucial for public health and the hydrological cycle. We present a new global dataset of UFP concentrations at the Earth's surface derived with a comprehensive chemistry–climate model and evaluated with ground-based observations. The evaluation results are combined with high-resolution primary emissions to downscale UFP concentrations to an unprecedented horizontal resolution of 0.1° × 0.1°.
Shiyi Lai, Ximeng Qi, Xin Huang, Sijia Lou, Xuguang Chi, Liangduo Chen, Chong Liu, Yuliang Liu, Chao Yan, Mengmeng Li, Tengyu Liu, Wei Nie, Veli-Matti Kerminen, Tuukka Petäjä, Markku Kulmala, and Aijun Ding
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By combining in-situ measurements and chemical transport modeling, this study investigates new particle formation (NPF) in the southeastern Tibetan Plateau. We found that the NPF was driven by the presence of biogenic gases and the transport of anthropogenic precursors. The NPF was vertical heterogeneous and shaped by the vertical mixing. This study highlights the importance of anthropogenic-biogenic interactions and meteorological dynamics in NPF in this climate-sensitive region.
Huisheng Bian, Mian Chin, Peter R. Colarco, Eric C. Apel, Donald R. Blake, Karl Froyd, Rebecca S. Hornbrook, Jose Jimenez, Pedro Campuzano Jost, Michael Lawler, Mingxu Liu, Marianne Tronstad Lund, Hitoshi Matsui, Benjamin A. Nault, Joyce E. Penner, Andrew W. Rollins, Gregory Schill, Ragnhild B. Skeie, Hailong Wang, Lu Xu, Kai Zhang, and Jialei Zhu
EGUsphere, https://doi.org/10.5194/egusphere-2023-1966, https://doi.org/10.5194/egusphere-2023-1966, 2023
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This work studies sulfur in remote troposphere at global and seasonal scales using aircraft measurements and multi-model simulations. The goal is to understand the sulfur cycle over remote oceans, the spread of model simulations, and the observation-model discrepancies. Such understanding and comparison with real observations are crucial to narrow down the uncertainties in model sulfur simulation and improve our understanding of sulfur cycle in atmospheric air quality, climate, and ecosystems.
Jun-Wei Xu, Jintai Lin, Dan Tong, and Lulu Chen
Atmos. Chem. Phys., 23, 10075–10089, https://doi.org/10.5194/acp-23-10075-2023, https://doi.org/10.5194/acp-23-10075-2023, 2023
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This study highlights the necessity of a low-carbon pathway in foreign countries for China to achieve air quality goals and to protect public health. We find that adopting the low-carbon instead of the fossil-fuel-intensive pathway in foreign countries would prevent 63 000–270 000 transboundary PM2.5-associated mortalities in China in 2060. Our study provides direct evidence of the necessity of inter-regional cooperation for air quality improvement.
Xurong Wang, Qiaoqiao Wang, Maria Prass, Christopher Pöhlker, Daniel Moran-Zuloaga, Paulo Artaxo, Jianwei Gu, Ning Yang, Xiajie Yang, Jiangchuan Tao, Juan Hong, Nan Ma, Yafang Cheng, Hang Su, and Meinrat O. Andreae
Atmos. Chem. Phys., 23, 9993–10014, https://doi.org/10.5194/acp-23-9993-2023, https://doi.org/10.5194/acp-23-9993-2023, 2023
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In this work, with an optimized particle mass size distribution, we captured observed aerosol optical depth (AOD) and coarse aerosol concentrations over source and/or receptor regions well, demonstrating good performance in simulating export of African dust toward the Amazon Basin. In addition to factors controlling the transatlantic transport of African dust, the study investigated the impact of African dust over the Amazon Basin, including the nutrient inputs associated with dust deposition.
Athanasios Tsikerdekis, Otto P. Hasekamp, Nick A. J. Schutgens, and Qirui Zhong
Atmos. Chem. Phys., 23, 9495–9524, https://doi.org/10.5194/acp-23-9495-2023, https://doi.org/10.5194/acp-23-9495-2023, 2023
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Aerosols are tiny particles of different substances (species) that can be emitted into the atmosphere by natural processes or by anthropogenic activities. However, the actual aerosol emission amount per species is highly uncertain. Thus in this work we correct the aerosol emissions used to drive a global aerosol–climate model using satellite observations through a process called data assimilation. These more accurate aerosol emissions can lead to a more accurate weather and climate prediction.
Jani Strömberg, Xiaoyu Li, Mona Kurppa, Heino Kuuluvainen, Liisa Pirjola, and Leena Järvi
Atmos. Chem. Phys., 23, 9347–9364, https://doi.org/10.5194/acp-23-9347-2023, https://doi.org/10.5194/acp-23-9347-2023, 2023
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We conclude that with low wind speeds, solar radiation has a larger decreasing effect (53 %) on pollutant concentrations than aerosol processes (18 %). Additionally, our results showed that with solar radiation included, pollutant concentrations were closer to observations (−13 %) than with only aerosol processes (+98 %). This has implications when planning simulations under calm conditions such as in our case and when deciding whether or not simulations need to include these processes.
Guanyu Liu, Jing Li, and Tong Ying
Atmos. Chem. Phys., 23, 9217–9228, https://doi.org/10.5194/acp-23-9217-2023, https://doi.org/10.5194/acp-23-9217-2023, 2023
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Fires in Australia are positively correlated with the El Niño–Southern Oscillation (ENSO). However, the correlation between ENSO and the Australian Fire Weather Index (FWI) increases from 0.17 to 0.70 when the Atlantic Multidecadal Oscillation (AMO) shifts from a negative to positive phase. This is explained by the teleconnection effect through which the warmer AMO generates Rossby wave trains and results in high pressures and a weather condition conducive to wildfires.
Adriana Rocha-Lima, Peter R. Colarco, Anton S. Darmenov, Edward P. Nowottnick, Arlindo M. da Silva, and Luke D. Oman
EGUsphere, https://doi.org/10.5194/egusphere-2023-1325, https://doi.org/10.5194/egusphere-2023-1325, 2023
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Observations show increasing trend of AOD in the Middle East between 2003–2012. This study evaluates the ability of the NASA GEOS model to capture these dust trends and examines the meteorological and surface parameters that drive dust emissions. The results obtained highlight the importance of data assimilation to capture the long-term trends of atmospheric aerosols and support the hypothesis that the loss of vegetation cover may have contributed to the increase in dust emissions in the period.
Min Zhao, Tie Dai, Daisuke Goto, Hao Wang, and Guangyu Shi
EGUsphere, https://doi.org/10.5194/egusphere-2023-1581, https://doi.org/10.5194/egusphere-2023-1581, 2023
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During a springtime pollution input from South Asia to the Tibetan Plateau, we combined atmospheric chemistry modeling and data assimilation methods to assimilate and forecast aerosols from South Asia and the Tibetan Plateau. Assimilation of observations over a whole time window leads to a more reasonable distribution of daily variations in the aerosol forecast field. We also find that aerosol assimilation can improve the surface solar energy forecast in the Tibetan Plateau region.
Leighton A. Regayre, Lucia Deaconu, Daniel P. Grosvenor, David M. H. Sexton, Christopher Symonds, Tom Langton, Duncan Watson-Paris, Jane P. Mulcahy, Kirsty J. Pringle, Mark Richardson, Jill S. Johnson, John W. Rostron, Hamish Gordon, Grenville Lister, Philip Stier, and Ken S. Carslaw
Atmos. Chem. Phys., 23, 8749–8768, https://doi.org/10.5194/acp-23-8749-2023, https://doi.org/10.5194/acp-23-8749-2023, 2023
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Aerosol forcing of Earth’s energy balance has persisted as a major cause of uncertainty in climate simulations over generations of climate model development. We show that structural deficiencies in a climate model are exposed by comprehensively exploring parametric uncertainty and that these deficiencies limit how much the model uncertainty can be reduced through observational constraint. This provides a future pathway towards building models with greater physical realism and lower uncertainty.
Chenwei Fang, Jim M. Haywood, Ju Liang, Ben T. Johnson, Ying Chen, and Bin Zhu
Atmos. Chem. Phys., 23, 8341–8368, https://doi.org/10.5194/acp-23-8341-2023, https://doi.org/10.5194/acp-23-8341-2023, 2023
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The responses of Asian summer monsoon duration and intensity to air pollution mitigation are identified given the net-zero future. We show that reducing scattering aerosols makes the rainy season longer and stronger across South Asia and East Asia but that absorbing aerosol reduction has the opposite effect. Our results hint at distinct monsoon responses to emission controls that target different aerosols.
Steven Soon-Kai Kong, Saginela Ravindra Babu, Sheng-Hsiang Wang, Stephen M. Griffith, Jackson Hian-Wui Chang, Ming-Tung Chuang, Guey-Rong Sheu, and Neng-Huei Lin
EGUsphere, https://doi.org/10.5194/egusphere-2023-1245, https://doi.org/10.5194/egusphere-2023-1245, 2023
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In this study, we combined ground observations from the 7-SEAS Dongsha Experiment, MERRA-2 reanalysis, and MODIS satellite images for evaluation and improvement of the CMAQ dust model for cases of EAD reaching the Taiwan region, including Dongsha Island in the western Pacific. We proposed a better CMAQ dust treatment over East Asia and first time revealed the impact of Typhoons on dust transport.
Yue Peng, Hong Wang, Xiaoye Zhang, Zhaodong Liu, Wenjie Zhang, Siting Li, Chen Han, and Huizheng Che
Atmos. Chem. Phys., 23, 8325–8339, https://doi.org/10.5194/acp-23-8325-2023, https://doi.org/10.5194/acp-23-8325-2023, 2023
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This study demonstrates a strong link between local circulation, aerosol–radiation interaction (ARI), and haze pollution. Under the weak weather-scale systems, the typical local circulation driven by mountainous topography is the main cause of pollutant distribution in the Beijing–Tianjin–Hebei region, and the ARI mechanism amplifies this influence of local circulation on pollutants, making haze pollution aggravated by the superposition of both.
Yuan Zhao, Xu Yue, Yang Cao, Jun Zhu, Chenguang Tian, Hao Zhou, Yuwen Chen, Yihan Hu, Weijie Fu, and Xu Zhao
Atmos. Chem. Phys., 23, 7823–7838, https://doi.org/10.5194/acp-23-7823-2023, https://doi.org/10.5194/acp-23-7823-2023, 2023
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We project the future changes of dust emissions and loading using an ensemble of model outputs from the Coupled Model Intercomparison Project version 6 under four scenarios. We find increased dust emissions and loading in North Africa, due to increased drought and strengthened surface wind, and decreased dust loading over Asia, following enhanced precipitation. Such a spatial pattern remains similar, though the regional intensity varies among different scenarios.
Ryan Schmedding and Andreas Zuend
Atmos. Chem. Phys., 23, 7741–7765, https://doi.org/10.5194/acp-23-7741-2023, https://doi.org/10.5194/acp-23-7741-2023, 2023
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Aerosol particles below 100 nm in diameter have high surface-area-to-volume ratios. The enrichment of compounds in the surface of an aerosol particle may lead to depletion of that species in the interior bulk of the particle. We present a framework for modeling the equilibrium bulk–surface partitioning of mixed organic–inorganic particles, including cases of co-condensation of semivolatile organic compounds and species with extremely limited solubility in the bulk or surface of a particle.
Leena Kangas, Jaakko Kukkonen, Mari Kauhaniemi, Kari Riikonen, Mikhail Sofiev, Anu Kousa, Jarkko V. Niemi, and Ari Karppinen
EGUsphere, https://doi.org/10.5194/egusphere-2023-1194, https://doi.org/10.5194/egusphere-2023-1194, 2023
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Residential wood combustion is a major source of fine particulate matter. This study has evaluated the contribution of residential wood combustion to fine particle concentrations, and its year-to-year and seasonal variation in Helsinki Metropolitan Area. The average concentrations attributed to wood combustion in winter were up to 10- or 15-fold, compared to summer. Wood combustion caused 12 to 14 % of annual fine particle concentrations. In winter, the contribution ranged from 16 to 21 %.
Daniel P. Grosvenor and Kenneth S. Carslaw
Atmos. Chem. Phys., 23, 6743–6773, https://doi.org/10.5194/acp-23-6743-2023, https://doi.org/10.5194/acp-23-6743-2023, 2023
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We determine what causes long-term trends in short-wave (SW) radiative fluxes in two climate models. A positive trend occurs between 1850 and 1970 (increasing SW reflection) and a negative trend between 1970 and 2014; the pre-1970 positive trend is mainly driven by an increase in cloud droplet number concentrations due to increases in aerosol, and the 1970–2014 trend is driven by a decrease in cloud fraction, which we attribute to changes in clouds caused by greenhouse gas-induced warming.
Danny M. Leung, Jasper F. Kok, Longlei Li, Gregory S. Okin, Catherine Prigent, Martina Klose, Carlos Pérez García-Pando, Laurent Menut, Natalie M. Mahowald, David M. Lawrence, and Marcelo Chamecki
Atmos. Chem. Phys., 23, 6487–6523, https://doi.org/10.5194/acp-23-6487-2023, https://doi.org/10.5194/acp-23-6487-2023, 2023
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Desert dust modeling is important for understanding climate change, as dust regulates the atmosphere's greenhouse effect and radiation. This study formulates and proposes a more physical and realistic desert dust emission scheme for global and regional climate models. By considering more aeolian processes in our emission scheme, our simulations match better against dust observations than existing schemes. We believe this work is vital in improving dust representation in climate models.
Natalie Marie Mahowald, Longlei Li, Samuel Albani, Douglas Stephen Hamilton, and Jasper Kok
EGUsphere, https://doi.org/10.5194/egusphere-2023-1174, https://doi.org/10.5194/egusphere-2023-1174, 2023
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Estimating the past aerosol radiative effects and their uncertainties is an important topic in climate science. Aerosol radiative effects propagate into large uncertainties in estimates of how present and future climate evolves with changing greenhouse gas emissions. A deeper understanding of how aerosols interacted with the atmospheric energy budget under past climates is hindered in part by a lack of relevant paleo observations and in part because less attention has been paid to the problem.
Danny M. Leung, Jasper F. Kok, Longlei Li, Natalie M. Mahowald, David M. Lawrence, Simone Tilmes, Erik Kluzek, Martina Klose, and Carlos Pérez García-Pando
EGUsphere, https://doi.org/10.5194/egusphere-2023-823, https://doi.org/10.5194/egusphere-2023-823, 2023
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This study uses a premier Earth system model to evaluate a new desert dust emission scheme proposed in our companion paper. We show that our scheme accounts for more dust emission physics, hence matching better against observations than other existing dust emission schemes do. Our scheme's dust emissions also couple tightly with meteorology, hence likely improving the modeled dust sensitivity to climate change. We believe this work is vital for improving dust representation in climate models.
Neeldip Barman and Sharad Gokhale
Atmos. Chem. Phys., 23, 6197–6215, https://doi.org/10.5194/acp-23-6197-2023, https://doi.org/10.5194/acp-23-6197-2023, 2023
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The study shows that during the pre-monsoon season transported aerosols, especially from the Indo-Gangetic Plain (IGP), have a greater impact with respect to air pollution, radiative forcing and rainfall over north-east (NE) India than emissions from within NE India itself. Hence, controlling emissions in the IGP will be significantly more fruitful in reducing pollution as well as climatic impacts over this region.
Vincenzo Obiso, María Gonçalves Ageitos, Carlos Pérez García-Pando, Gregory L. Schuster, Susanne E. Bauer, Claudia Di Biagio, Paola Formenti, Jan P. Perlwitz, Konstantinos Tsigaridis, and Ronald L. Miller
EGUsphere, https://doi.org/10.5194/egusphere-2023-1166, https://doi.org/10.5194/egusphere-2023-1166, 2023
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We account for regionally varying soil mineral content to calculate the dust shortwave direct radiative effect. Compared to a model with uniform dust composition, our observationally constrained approach reduces dust absorption while increasing its spatio-temporal variation, in better agreement with AERONET. Explicit treatment of mineral content increases cooling by dust. Better measurements of soil minerals and refined modeling techniques are needed to improve estimates of dust-climate impacts.
Huan Yang, Ivo Neefjes, Valtteri Tikkanen, Jakub Kubečka, Theo Kurtén, Hanna Vehkamäki, and Bernhard Reischl
Atmos. Chem. Phys., 23, 5993–6009, https://doi.org/10.5194/acp-23-5993-2023, https://doi.org/10.5194/acp-23-5993-2023, 2023
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We present a new analytical model for collision rates between molecules and clusters of arbitrary sizes, accounting for long-range interactions. The model is verified against atomistic simulations of typical acid–base clusters participating in atmospheric new particle formation (NPF). Compared to non-interacting models, accounting for long-range interactions leads to 2–3 times higher collision rates for small clusters, indicating the necessity of including such interactions in NPF modeling.
Haihui Zhu, Randall V. Martin, Betty Croft, Shixian Zhai, Chi Li, Liam Bindle, Jeffrey R. Pierce, Rachel Y.-W. Chang, Bruce E. Anderson, Luke D. Ziemba, Johnathan W. Hair, Richard A. Ferrare, Chris A. Hostetler, Inderjeet Singh, Deepangsu Chatterjee, Jose L. Jimenez, Pedro Campuzano-Jost, Benjamin A. Nault, Jack E. Dibb, Joshua S. Schwarz, and Andrew Weinheimer
Atmos. Chem. Phys., 23, 5023–5042, https://doi.org/10.5194/acp-23-5023-2023, https://doi.org/10.5194/acp-23-5023-2023, 2023
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Particle size of atmospheric aerosol is important for estimating its climate and health effects, but simulating atmospheric aerosol size is computationally demanding. This study derives a simple parameterization of the size of organic and secondary inorganic ambient aerosol that can be applied to atmospheric models. Applying this parameterization allows a better representation of the global spatial pattern of aerosol size, as verified by ground and airborne measurements.
Arto Heitto, Cheng Wu, Diego Aliaga, Luis Blacutt, Xuemeng Chen, Yvette Gramlich, Liine Heikkinen, Wei Huang, Radovan Krejci, Paolo Laj, Isabel Moreno, Karine Sellegri, Fernando Velarde, Kay Weinhold, Alfred Wiedensohler, Qiaozhi Zha, Federico Bianchi, Marcos Andrade, Kari E. J. Lehtinen, Claudia Mohr, and Taina Yli-Juuti
EGUsphere, https://doi.org/10.5194/egusphere-2023-526, https://doi.org/10.5194/egusphere-2023-526, 2023
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Particle growth at Chacaltaya station in Bolivia was simulated based on measured vapor concentrations and ambient conditions. Major contributors to the simulated growth were low volatile organic compounds (LVOC). Also sulfuric acid had major role when volcanic activity was occurring in the area. This study provides insight on nanoparticle growth at this high-altitude Southern Hemispheric site and hence contributes to building the knowledge on early growth of atmospheric particles.
Mengjiao Jiang, Yaoting Li, Weiji Hu, Yinshan Yang, Guy Brasseur, and Xi Zhao
Atmos. Chem. Phys., 23, 4545–4557, https://doi.org/10.5194/acp-23-4545-2023, https://doi.org/10.5194/acp-23-4545-2023, 2023
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Relatively clean background aerosol over the Tibetan Plateau makes the study of aerosol–cloud–precipitation interactions distinctive. A convection on 24 July 2014 in Naqu was selected using the Weather Research Forecasting (WRF) model, including the Thompson aerosol-aware microphysical scheme. Our study uses a compromise approach to the limited observations. We show that the transformation of cloud water to graupel and the development of convective clouds are favored in a polluted situation.
Pantelis Kiriakidis, Antonis Gkikas, Georgios Papangelis, Theodoros Christoudias, Jonilda Kushta, Emmanouil Proestakis, Anna Kampouri, Eleni Marinou, Eleni Drakaki, Angela Benedetti, Michael Rennie, Christian Retscher, Anne Grete Straume, Alexandru Dandocsi, Jean Sciare, and Vasilis Amiridis
Atmos. Chem. Phys., 23, 4391–4417, https://doi.org/10.5194/acp-23-4391-2023, https://doi.org/10.5194/acp-23-4391-2023, 2023
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With the launch of the Aeolus satellite, higher-accuracy wind products became available. This research was carried out to validate the assimilated wind products by testing their effect on the WRF-Chem model predictive ability of dust processes. This was carried out for the eastern Mediterranean and Middle East region for two 2-month periods in autumn and spring 2020. The use of the assimilated products improved the dust forecasts of the autumn season (both quantitatively and qualitatively).
Ian Chang, Lan Gao, Connor J. Flynn, Yohei Shinozuka, Sarah J. Doherty, Michael S. Diamond, Karla M. Longo, Gonzalo A. Ferrada, Gregory R. Carmichael, Patricia Castellanos, Arlindo M. da Silva, Pablo E. Saide, Calvin Howes, Zhixin Xue, Marc Mallet, Ravi Govindaraju, Qiaoqiao Wang, Yafang Cheng, Yan Feng, Sharon P. Burton, Richard A. Ferrare, Samuel E. LeBlanc, Meloë S. Kacenelenbogen, Kristina Pistone, Michal Segal-Rozenhaimer, Kerry G. Meyer, Ju-Mee Ryoo, Leonhard Pfister, Adeyemi A. Adebiyi, Robert Wood, Paquita Zuidema, Sundar A. Christopher, and Jens Redemann
Atmos. Chem. Phys., 23, 4283–4309, https://doi.org/10.5194/acp-23-4283-2023, https://doi.org/10.5194/acp-23-4283-2023, 2023
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Abundant aerosols are present above low-level liquid clouds over the southeastern Atlantic during late austral spring. The model simulation differences in the proportion of aerosol residing in the planetary boundary layer and in the free troposphere can greatly affect the regional aerosol radiative effects. This study examines the aerosol loading and fractional aerosol loading in the free troposphere among various models and evaluates them against measurements from the NASA ORACLES campaign.
Ruth A. R. Digby, Nathan P. Gillett, Adam H. Monahan, Knut von Salzen, Antonis Gkikas, Qianqian Song, and Zhibo Zhang
EGUsphere, https://doi.org/10.5194/egusphere-2023-432, https://doi.org/10.5194/egusphere-2023-432, 2023
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The COVID-19 lockdowns reduced aerosol emissions. We ask whether these reductions affected regional aerosol optical depth (AOD), and compare the observed changes to predictions from Earth System Models. Only India shows an observed AOD reduction outside of typical variability. Models overestimate the response, but when necessary factors have been accounted for, the agreement is improved. Our results suggest that current models can realistically predict the effects of future emission changes.
Juli I. Rubin, Jeffrey S. Reid, Peng Xian, Christopher M. Selman, and Thomas F. Eck
Atmos. Chem. Phys., 23, 4059–4090, https://doi.org/10.5194/acp-23-4059-2023, https://doi.org/10.5194/acp-23-4059-2023, 2023
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This work aims to quantify the covariability between aerosol optical depth/extinction with water vapor (PW) globally, using NASA AERONET observations and NAAPS model data. Findings are important for data assimilation and radiative transfer. The study shows statistically significant and positive AOD–PW relationships are found across the globe, varying in strength with location and season and tied to large-scale aerosol events. Hygroscopic growth was also found to be an important factor.
Gargi Sengupta, Minjie Zheng, and Nønne L. Prisle
EGUsphere, https://doi.org/10.5194/egusphere-2023-438, https://doi.org/10.5194/egusphere-2023-438, 2023
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The effect of organic acid aerosol on sulfur chemistry and cloud properties was investigated in an atmospheric model. Organic acid dissociation was considered using both bulk and surface related properties. We found that organic acid dissociation leads to increased hydrogen ion concentrations and sulfate aerosol mass in aqueous aerosols, increasing cloud formation. This could be important in large scale climate models as many organic aerosol components are both acidic and surface-active.
Christopher D. Wells, Matthew Kasoar, Nicolas Bellouin, and Apostolos Voulgarakis
Atmos. Chem. Phys., 23, 3575–3593, https://doi.org/10.5194/acp-23-3575-2023, https://doi.org/10.5194/acp-23-3575-2023, 2023
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The climate is altered by greenhouse gases and air pollutant particles, and such emissions are likely to change drastically in the future over Africa. Air pollutants do not travel far, so their climate effect depends on where they are emitted. This study uses a climate model to find the climate impacts of future African pollutant emissions being either high or low. The particles absorb and scatter sunlight, causing the ground nearby to be cooler, but elsewhere the increased heat causes warming.
Geeta G. Persad
Atmos. Chem. Phys., 23, 3435–3452, https://doi.org/10.5194/acp-23-3435-2023, https://doi.org/10.5194/acp-23-3435-2023, 2023
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Human-induced aerosol pollution has major impacts on both local and global precipitation. This study demonstrates using a global climate model that both the strength and localization of aerosols' precipitation impacts are highly dependent on which region the aerosols are emitted from. The findings highlight that the geographic distribution of human-induced aerosol emissions must be accounted for when quantifying their influence on global precipitation.
Tuuli Miinalainen, Harri Kokkola, Antti Lipponen, Antti-Pekka Hyvärinen, Vijay Kumar Soni, Kari E. J. Lehtinen, and Thomas Kühn
Atmos. Chem. Phys., 23, 3471–3491, https://doi.org/10.5194/acp-23-3471-2023, https://doi.org/10.5194/acp-23-3471-2023, 2023
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We simulated the effects of aerosol emission mitigation on both global and regional radiative forcing and city-level air quality with a global-scale climate model. We used a machine learning downscaling approach to bias-correct the PM2.5 values obtained from the global model for the Indian megacity New Delhi. Our results indicate that aerosol mitigation could result in both improved air quality and less radiative heating for India.
Peng Wang, Ruhan Zhang, Shida Sun, Meng Gao, Bo Zheng, Dan Zhang, Yanli Zhang, Gregory R. Carmichael, and Hongliang Zhang
Atmos. Chem. Phys., 23, 2983–2996, https://doi.org/10.5194/acp-23-2983-2023, https://doi.org/10.5194/acp-23-2983-2023, 2023
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In China, the number of vehicles has jumped significantly in the last decade. This caused severe traffic congestion and aggravated air pollution. In this study, we developed a new temporal allocation approach to quantify the impacts of traffic congestion. We found that traffic congestion worsens air quality and the health burden across China, especially in the urban clusters. More effective and comprehensive vehicle emission control policies should be implemented to improve air quality in China.
Ruth Price, Andrea Baccarini, Julia Schmale, Paul Zieger, Ian M. Brooks, Paul Field, and Ken S. Carslaw
Atmos. Chem. Phys., 23, 2927–2961, https://doi.org/10.5194/acp-23-2927-2023, https://doi.org/10.5194/acp-23-2927-2023, 2023
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Arctic clouds can control how much energy is absorbed by the surface or reflected back to space. Using a computer model of the atmosphere we investigated the formation of atmospheric particles that allow cloud droplets to form. We found that particles formed aloft are transported to the lowest part of the Arctic atmosphere and that this is a key source of particles. Our results have implications for the way Arctic clouds will behave in the future as climate change continues to impact the region.
Kevin Ohneiser, Albert Ansmann, Jonas Witthuhn, Hartwig Deneke, Alexandra Chudnovsky, Gregor Walter, and Fabian Senf
Atmos. Chem. Phys., 23, 2901–2925, https://doi.org/10.5194/acp-23-2901-2023, https://doi.org/10.5194/acp-23-2901-2023, 2023
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This study shows that smoke layers can reach the tropopause via the self-lofting effect within 3–7 d in the absence of pyrocumulonimbus convection if the
aerosol optical thickness is larger than approximately 2 for a longer time period. When reaching the stratosphere, wildfire smoke can sensitively influence the stratospheric composition on a hemispheric scale and thus can affect the Earth’s climate and the ozone layer.
Christer Johansson, Zhiguo Zhang, Magnuz Engardt, Massimo Stafoggia, and Xiaoliang Ma
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2023-38, https://doi.org/10.5194/acp-2023-38, 2023
Revised manuscript accepted for ACP
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Up-to-date information on present and coming days’ air quality help people avoid exposure to high levels of air pollution. We apply different machine learning models to significantly improve traditional forecasts of PM10, NOx, and O3 in Stockholm, Sweden. It is shown that forecasts of all air pollutants are improved by through the input of lagged measurements and taking into account calendar information. The final modelled errors are substantially smaller than uncertainties in the measurements.
Marios Chatziparaschos, Nikos Daskalakis, Stelios Myriokefalitakis, Nikos Kalivitis, Athanasios Nenes, María Gonçalves Ageitos, Montserrat Costa-Surós, Carlos Pérez García-Pando, Medea Zanoli, Mihalis Vrekoussis, and Maria Kanakidou
Atmos. Chem. Phys., 23, 1785–1801, https://doi.org/10.5194/acp-23-1785-2023, https://doi.org/10.5194/acp-23-1785-2023, 2023
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Ice formation is enabled by ice-nucleating particles (INP) at higher temperatures than homogeneous formation and can profoundly affect the properties of clouds. Our global model results show that K-feldspar is the most important contributor to INP concentrations globally, affecting mid-level mixed-phase clouds. However, quartz can significantly contribute and dominates the lowest and the highest altitudes of dust-derived INP, affecting mainly low-level and high-level mixed-phase clouds.
Cited articles
Ackermann, I. J., Hass, H., Memmesheimer, M., Ebel, A., Binkowski, F. S.,
and Shankar, U.: Modal aerosol dynamics model for Europe: development and
first applications, Atmos. Environ., 32, 2981–2999, 1998.
Ahmadov, R., McKeen, S. A., Robinson, A. L., Bahreini, R., Middlebrook, A.
M., de Gouw, J. A., Meagher, J., Hsie, E. Y., Edgerton, E., Shaw, S., and
Trainer, M.: A volatility basis set model for summertime secondary organic
aerosols over the eastern United States in 2006, J. Geophys. Res., 117,
D06301, https://doi.org/10.1029/2011JD016831, 2012.
Albuquerque, T. T. A., Andrade, M. F., and Ynoue, R. Y.: Characterization of
atmospheric aerosols in the city of Sao Paulo, Brazil: comparisons between
polluted and unpolluted periods, Water Air Soil Poll., 195, 201–213, 2011.
Anderson, L.: Ethanol fuel use in Brazil: air quality impacts, Energy
Environ. Sci., 2, 1015–1037, 2009.
Andrade, M. F., Fornaro, A., Miranda, R. M., Kerr, A., Oyama, B., Andre, P.
A., and Saldiva, P.: Vehicle emissions and PM2.5 mass concentrations in
six Brazilian cities, Air Qual. Atmos. Health, 5, 79–88, 2012.
Andrade, M. F., Ynoue, R. Y., Freitas, E. D., Todesco, E., Vara-Vela, A.,
Ibarra, S., Martins, L. D., Martins, J. A., and Carvalho, V. S. B.: Air
quality forecasting system for Southeastern Brazil, Front. Environ. Sci., 3,
1–14, 2015.
Binkowski, F. S. and Shankar, U.: The regional particulate matter model, 1.
Mode description and preliminary results, J. Geophys. Res., 100,
26191–26209, 1995.
Birch, M. E. and Cary, R. A.: Elemental carbon-based method for occupational
monitoring of particulate diesel exhaust: methodology and exposure issues,
Aerosol Sci. Tech., 25, 221–241, 1996.
Brito, J., Rizzo, L. V., Herckes, P., Vasconcellos, P. C., Caumo, S. E. S.,
Fornaro, A., Ynoue, R. Y., Artaxo, P., and Andrade, M. F.: Physical–chemical
characterisation of the particulate matter inside two road tunnels in the
São Paulo Metropolitan Area, Atmos. Chem. Phys., 13, 12199–12213,
https://doi.org/10.5194/acp-13-12199-2013, 2013.
Brown, S. G., Lee, T., Roberts, P. T., and Collett Jr., J. L.: Variations in
the OM ∕ OC ratio of urban organic aerosol next to a major roadway, J.
Air Waste Manage., 63, 1422–1433, 2013.
Carvalho, V. S. B., Freitas, E. D., Martins, L. D., Martins, J. A., Mazzoli,
C. R., and Andrade, M. F.: Air quality status and trends over the
Metropolitan Area of Sao Paulo, Brazil as a result of emission control
policies, Environ. Sci. Policy, 47, 68–79, 2015.
Castanho, A. D. A. and Artaxo, P.: Sao Paulo aerosol source apportionment for
wintertime and summertime, Atmos. Environ., 35, 4889–4902, 2001.
CETESB – Companhia de Tecnologia de Saneamento Ambiental: Relatorio Anual de
Qualidade do Ar no Estado de Sao Paulo 2009, Sao Paulo, Brazil, 2010.
CETESB – Companhia de Tecnologia de Saneamento Ambiental: Emissões
veiculares no Estado de São Paulo 2011, Sao Paulo, Brazil, 2012.
CETESB – Companhia de Tecnologia de Saneamento Ambiental: Relatorio Anual de
Qualidade do Ar no Estado de Sao Paulo 2012, Sao Paulo, Brazil, 2013.
Chang, J. S., Binkowki, F. S., Seaman, N. L., McHenry, J. N., Samson, P. J.,
Stockwell, W. R., Walcek, C. J., Madronich, S., Middleton, P. B., Pleim, J.
E., and Lansford, H. H.: The regional acid deposition model and engineering
model, State-of-Science/Technology, Report 4, National Acid Precipitation
Assessment Program, Washington, DC, USA, 1989.
Costa, R. C. and Sodré, J. R.: Hydrous ethanol vs. gasoline-ethanol
blend: Engine performance and emissions, Fuel, 89, 287–293, 2010.
Draxler, R. R. and Hess, G. D.: An overview of the HYSPLIT 4 modelling system
of trajectories, dispersion, and deposition, Aust. Meteorol. Mag., 47,
295–308, 1998.
Emmons, L. K., Walters, S., Hess, P. G., Lamarque, J.-F., Pfister, G. G.,
Fillmore, D., Granier, C., Guenther, A., Kinnison, D., Laepple, T., Orlando,
J., Tie, X., Tyndall, G., Wiedinmyer, C., Baughcum, S. L., and Kloster, S.:
Description and evaluation of the Model for Ozone and Related chemical
Tracers, version 4 (MOZART-4), Geosci. Model Dev., 3, 43–67,
https://doi.org/10.5194/gmd-3-43-2010, 2010.
Fast, J. D., Gustafson, W. I., Easter, R. C., Zaveri, R. A., Barnard, J. C.,
Chapman, E. G., Grell, G. A., and Peckham, S. E.: Evolution of ozone,
particulates, and aerosol direct radiative forcing in the vecinity of Houston
using a fully coupled meteorology-chemistry-aerosol module, J. Geophys. Res.,
111, D21305, https://doi.org/10.1029/2005JD006721, 2006.
Forkel, R., Werhahn, J., Hansen, A. B., McKeen, S., Peckham, S., Grell, G.,
and Suppan, P.: Effect of aerosol-radiation feedback on regional air quality
– A case study with WRF/Chem, Atmos. Environ., 53, 202–211, 2012.
Ginoux, P., Chin, M., Tegen, I., Prospero, J. M., Holben, B., Dubovik, O.,
and Lin, S.-J.: Sources and distributions of dust aerosols simulated with the
GOCART model, J. Geophys. Res., 106, 20255–20273, 2001.
Gong, S. L.: A parameterization of sea-salt aerosol source function for sub-
and super-micron particles, Global Biogeochem. Cy., 17, 1097,
https://doi.org/10.1029/2003GB002079, 2003.
Gorin, C. A., Collett Jr., J. L., and Herckes, P.: Wood smoke contribution to
winter aerosol in Fresno, CA, J. Air Waste Manage., 56, 1584–1590, 2006.
GrEC – Grupo de Estudos Climáticos: Relatório climatológico
mensal, previsão climática para o Brasil: Set-Out-Nov/2012, Sao
Paulo, Brazil, available at:
www.grec.iag.usp.br/link_grec_old/relatorios_climatologicos/2012/agosto/
(last access: 18 March 2014), 2012a.
GrEC – Grupo de Estudos Climáticos: Relatório climatológico
mensal, monitoramento climático para o Brasil: Set/2012, Sao Paulo,
Brazil, available at:
www.grec.iag.usp.br/link_grec_old/relatorios_climatologicos/2012/setembro/
(last access: 18 March 2014), 2012b.
Grell, G. A., Peckham, S. E., Schmitz, R., McKeen, S. A., Wilczak, J., and
Eder, B.: Fully coupled “online” chemistry within the WRF model, Atmos.
Environ., 39, 6957–6975, 2005.
Guenther, A. B., Zimmerman, P. R., Harley, P. C., Monson, R. K., and Fall,
R.: Isoprene and monoterpene emission rate variability: model evaluations and
sensitivity analyses, J. Geophys. Res., 98D, 12609–12617, 1993.
Guenther, A. B., Zimmerman, P., and Wildermuth, M.: Natural volatile organic
compound emission rateestimates for US woodland landscapes, Atmos. Environ.,
28, 1197–1210, 1994.
Heal, M. R., Kumar, P., and Harrison, R. M.: Particles, air quality, policy
and health, Chem. Soc. Rev., 41, 6606–6630, 2012.
Jenkin, M. E. and Clemitshaw, K. C.: Ozone and other secondary photochemical
pollutants: chemical processes governing their formation in the planetary
boundary layer, Atmos. Environ., 34, 2499–2527, 2000.
Kroll, J. H. and Seinfeld, J. H.: Chemistry of secondary organic aerosol:
Formation and evolution of low-volatility organics in the atmosphere, Atmos.
Environ., 42, 3593–3624, 2008.
Kulmala, M., Laaksonen, A., and Pirjola, L.: Parameterization for sulphuric
acid/water nucleation rates, J. Geophys. Res., 103, 8301–8307, 1998.
Kumar, P., Robins, A., Vardoulakis, S., and Britter, R.: A review of the
characteristics of nanoparticles in the urban atmosphere and the prospects
for developing regulatory control, Atmos. Environ., 44, 5035–5052, 2010.
Kumar, P., Ketzel, M., Vardoulakis, S., Pirjola, L., and Britter, R.:
Dynamics and dispersion modelling of nanoparticles from road traffic in the
urban atmospheric environment – a review, J. Aerosol Sci., 42, 580–603,
2011.
Kumar, P., Morawska, L., Birmili, W., Paasonen, P., Hu, M., Kulmala, M.,
Harrison, R.M., Norford, L., and Britter, R.: Ultrafine particles in cities,
Environ. Int., 66, 1–10, 2014.
Li, G., Zhang, R., and Fan, J.: Impacts of black carbon aerosol on photolysis
and ozone, J. Geophys. Res., 110, D23206, https://doi.org/10.1029/2005JD005898, 2005.
Li, G., Bei, N., Tie, X., and Molina, L. T.: Aerosol effects on the
photochemistry in Mexico City during MCMA-2006/MILAGRO campaign, Atmos. Chem.
Phys., 11, 5169–5182, https://doi.org/10.5194/acp-11-5169-2011, 2011a.
Li, G., Zavala, M., Lei, W., Tsimpidi, A. P., Karydis, V. A., Pandis, S. N.,
Canagaratna, M. R., and Molina, L. T.: Simulations of organic aerosol
concentrations in Mexico City using the WRF-CHEM model during the
MCMA-2006/MILAGRO campaign, Atmos. Chem. Phys., 11, 3789–3809,
https://doi.org/10.5194/acp-11-3789-2011, 2011b.
Marple, V. A., Rubow, K. L., Ananth, G. P., and Fissan, H. J.: Micro-Orifice
Uniform Deposit Impactor, J. Aerosol Sci., 17, 489–494, 1986.
Martins, L. D., Vasconcellos, P. C., Carvalho, L. F., and Andrade, M. F.:
Estimated impact of biogenic hydrocarbon emissions on photochemical oxidant
formation in Sao Paulo during two periods of the winters of 1999–2000,
Revista Brasileira de Meteorologia, 21, 190–200, 2006.
Matsui, H., Koike, M., Kondo, Y., Takami, A., Fast, J. D., Kanaya, Y., and
Takigawa, M.: Volatility basis-set approach simulation of organic aerosol
formation in East Asia: implications for anthropogenic–biogenic interaction
and controllable amounts, Atmos. Chem. Phys., 14, 9513–9535,
https://doi.org/10.5194/acp-14-9513-2014, 2014.
McMurry, P., Shepherd, M., and Vickery, J.: Particulate Matter Science for
Policy Makers: A NARSTO Assessment, Cambridge University Press, Cambridge,
UK, 2004.
Middleton, P., Stockwell, W. R., and Carter, W. P. L.: Aggregation and
analysis of volatile organic compound emissions for regional modelling,
Atmos. Environ., 24A, 1107–1133, 1990.
Miranda, R. M. and Andrade, M. F.: Physicochemical characteristics of
atmospheric aerosols during winter in the Sao Paulo Metropolitan Area in
Brazil, Atmos. Environ., 39, 6188–6193, 2005.
Monahan, E. C., Spiel, D. E., and Davidson, K. L.: A model of marine aerosol
generation via whitecaps and wave disruption, in: Oceanic Whitecaps, edited
by: Monahan, E. C. and MacNiocaill, G. D., Reidel Publishing Company,
Norwell, USA, 167–174, 1986.
Monks, P. S.: Gas-phase radical chemistry in the troposphere, Chem. Soc.
Rev., 34, 376–395, 2005.
Muñoz, A. G., López, P., Velásquez, R., Monterrey, L., León,
G., Ruiz, F., Recalde, C., Cadena, J., Mejía, R., Paredes, M., Bazo, J.,
Reyes, C., Carrasco, G., Castellón, Y., Villarroel, C., Quintana, J., and
Urdaneta, A.: An Environmental Watch System for the Andean Countries: El
Observatorio Andino, B. Am. Meteorol. Soc., 91, 1645–1652, 2010.
Muñoz, A. G., Ruiz-Carrascal, D., Ramírez, P., León, G.,
Quintana, J., Bonilla, A., Torres, W., Pastén, M., and Sánchez, O.:
Risk Management at the Latin American Observatory, in: Risk Management –
Current Issues and Challenges, InTech Publications, 533–556,
https://doi.org/10.5772/50788, 2012.
Nogueira, T., Dominutti, P. A., De Carvalho, L. R. F., Fornaro, A., and
Andrade, M. F.: Formaldehyde and acetaldehyde measurements in urban
atmosphere impacted by the use of ethanol biofuel: Metropolitan Area of Sao
Paulo, 2012–2013, Fuel, 134, 505–513, 2014.
Odum, J. R., Hoffmann, T., Bowman, F., Collins, D., Flagan, R. C., and
Seinfeld, J. H.: Gas/particle partitioning and secondary organic aerosol
yields, Environ. Sci. Technol., 30, 2580–2585, 1996.
Pankow, J. F.: An absorption model of the gas aerosol partitioning involved
in the formation of secondary organic aerosol, Atmos. Environ., 28, 185–188,
1994a.
Pankow, J. F.: An absorption model of the gas aerosol partitioning involved
in the formation of secondary organic aerosol, Atmos. Environ., 28, 189–193,
1994b.
Pérez-Martínez, P. J., Miranda, R. M., Nogueira, T., Guardani, M.
L., Fornaro, A., Ynoue, R., and Andrade, M. F.: Emission factors of air
pollutants from vehicles measured inside road tunnels in Sao Paulo: case
study comparison, Int. J. Environ. Sci. Technol., 11, 2155–2168, 2014.
Pérez-Martínez, P. J., Andrade, M. F., and Miranda, R. M.:
Traffic-related air quality trends in Sao Paulo, Brazil, J. Geophys. Res.
Atmos., 120, 6290–6304, https://doi.org/10.1002/2014JD022812, 2015.
Real, E. and Sartelet, K.: Modeling of photolysis rates over Europe: impact
on chemical gaseous species and aerosols, Atmos. Chem. Phys., 11, 1711–1727,
https://doi.org/10.5194/acp-11-1711-2011, 2011.
Salvo, A. and Geiger, F. M.: Reduction in local ozone levels in urban Sao
Paulo due to a shift from ethanol to gasoline use, Nat. Geosci., 7, 450–458,
https://doi.org/10.1038/ngeo2144, 2014.
Saxena, P., Hudischewskyj, A. B., Seigneur, C., and Seinfeld, J. H.: A
comparative study of equilibrium approaches to the chemical characterization
of secondary aerosols, Atmos. Environ., 20, 1471–1483, 1986.
Schell, B., Ackerman, I. J., Hass, H., Binkowski, F. S., and Ebel, A.:
Modelling the formation of secondary organic aerosol within a comprehensive
air quality model system, J. Geophys. Res., 106, 28275–28293, 2001.
Seinfeld, J. H. and Pandis, S. N.: Atmospheric Chemistry and Physics: from
air pollution to climate change, Second Edition, John Wiley, New Jersey, USA,
2006.
Shrivastava, M., Berg, L. K., Fast, J. F., Easter, R. C., Laskin, A.,
Chapman, E. G., Gustafson Jr., W. I., Liu, Y., and Berkowitz, C. M.:
Modelling aerosols and their interactions with shallow cumuli during the 2007
CHAPS field study, J. Geophys. Res.-Atmos., 118, 1343–1360, 2013.
Taylor, K. E.: Summarizing multiple aspects of model performance in a single
diagram, J. Geophys. Res., 106, 7183–7192, https://doi.org/10.1029/2000JD900719, 2001.
Tuccella, P., Curci, G., Visconti, G., Bessagnet, B., Menut, L., and Park, R.
J.: Modelling of gas and aerosol with WRF-Chem over Europe: Evaluation and
sensitivity study, J. Geophys. Res., 117, D03303, https://doi.org/10.1029/2011JD016302,
2012.
Vasconcellos, P. C., Souza, D. Z., Sanchez-Ccoyllo, O. R., Bustillos, J. O.
V., Lee, H., Santos, F. C., Nascimento, K. H., Araujo, M. P., Saarnio, K.,
Teinila, K., and Hillamo, R.: Determination of anthropogenic and biogenic
compounds on atmospheric aerosol collected in urban, biomass burning and
forest areas in Sao Paulo, Brazil, Sci. Total Environ., 408, 5836–5844,
2010.
Vieira-Filho, M. S., Pedrotti, J. J., and Fornaro, A.: Contribution of long
and mid-range transport on the sodium and potassium concentrations in
rainwater samples, Sao Paulo megacity, Brazil, Atmos. Environ., 79, 299–307,
2013.
Wedding, J. B., Weigand, M., John, W., and Wall, S.: Sampling effectiveness
of the inlet to the dichotomous sampler, Environ. Sci. Technol., 14,
1367–1370, 1980.
Ynoue, R. Y. and Andrade, M. F.: Size-resolved mass balance of aerosol
particles over the Sao Paulo Metropolitan Area of Brazil, Aerosol Sci. Tech.,
1, 52–62, 2004.
Short summary
This study provides a first step to understand the impact of vehicular emissions on the formation of secondary particles as well as the feedback between these particles and meteorology in the Sao Paulo Metropolitan Area (SPMA). Among the main research findings are:
- The emissions of primary gases from vehicles led to a production between 20 and 30 % due to new particles formation in relation to the total mass concentration PM2.5 in the downtown SPMA.
This study provides a first step to understand the impact of vehicular emissions on the...
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