Journal of Geophysical Research: Atmospheres最新文献_第4页

Aqueous-Phase Processing Affects the Formation and Size Distribution of Aerosol Organic Functional Groups During Heavy Pollution

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-02-04 DOI: 10.1029/2024JD042029

Sheng-Shi Mei, Kaihui Xia, Cheng-Cheng Liu, Xiaokang Chen, Renmin Yuan, Hao Liu, Chun Zhao, Shang Liu

{"title":"Aqueous-Phase Processing Affects the Formation and Size Distribution of Aerosol Organic Functional Groups During Heavy Pollution","authors":"Sheng-Shi Mei, Kaihui Xia, Cheng-Cheng Liu, Xiaokang Chen, Renmin Yuan, Hao Liu, Chun Zhao, Shang Liu","doi":"10.1029/2024JD042029","DOIUrl":"https://doi.org/10.1029/2024JD042029","url":null,"abstract":"Size-resolved organic functional group (OFG) concentrations in aerosol particles were measured during January−February 2019 in Hefei, a major urban city in eastern China. Alkane, carboxylic acid, and hydroxyl groups were the main components of the organic aerosol (OA), contributing 35.0%, 22.5%, and 21.8%, respectively. The mass concentrations and size distributions of the OFGs strongly depended on ambient relative humidity (RH). Specifically, the OFG mass concentrations were 50% higher during the high-RH periods than the low-RH periods. The peak size of the OFGs size distribution was 0.56–1 μm during the high-RH periods, while a peak size of 0.32–0.56 μm was observed during the low-RH periods. In addition, the concentrations of the total OA, carboxylic acid, and hydroxyl groups were positively correlated with the photochemical age (PCA), with the high-RH samples increasing faster (greater slope) with PCA and being associated with a higher oxygen-to-carbon ratio. These results suggest that aqueous-phase processing likely enhanced the production of the OFGs, especially oxygenated functional groups. Further analysis of size distribution of the oxygenated OFGs and the viscosity of aerosols indicates that the secondary OFGs were formed via surface-limited mechanisms under low-RH conditions and volume-limited mechanisms under high-RH conditions. These findings reinforce the important role of multiphase chemistry in the formation and evolution of OAs.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Would the 2021 Western Europe Flood Event Be Visible in Satellite Gravimetry?

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-02-01 DOI: 10.1029/2024JD042190

Magdalena Kracheletz, Ziyu Liu, Anne Springer, Jürgen Kusche, Petra Friederichs

{"title":"Would the 2021 Western Europe Flood Event Be Visible in Satellite Gravimetry?","authors":"Magdalena Kracheletz, Ziyu Liu, Anne Springer, Jürgen Kusche, Petra Friederichs","doi":"10.1029/2024JD042190","DOIUrl":"https://doi.org/10.1029/2024JD042190","url":null,"abstract":"The primary objective of the GRACE Follow-On satellite mission is to measure temporal changes in the Earth's gravitational field. Distance variations between the two GRACE-FO satellites, recorded by a K-Band Ranging system and a new Laser Ranging Interferometer (LRI), are significantly influenced by atmospheric mass redistribution. We investigate whether the sub-monthly variations in atmospheric water mass, precipitation, and changes in total water storage during the extreme flood event in western Europe in 2021 were sufficiently large to influence the satellite gravity field measurements, if the GRACE-FO satellites would have passed directly over the region. We use several data sets such as weather forecasts (ICON-D2 model), hydrological simulations (ParFlow/CLM), observations as well as reanalyses, showing the high uncertainty between different estimations of the considered variables: total precipitable water, total precipitation, and total water storage. Our estimates suggest a potentially noticeable impact of the 2021 flood event on the GRACE-FO satellites. Although it was globally seen a rather small event, even the atmospheric water mass beyond water vapor, which is not considered within the de-aliasing process, is close to the LRI detection accuracy. This is particularly relevant for future gravity missions, which will use the LRI with potentially higher sensitivity as their main instrument. Sub-monthly variations in the total atmospheric water mass, that is, beyond water vapor of huge extreme precipitation events should be investigated further to reduce potential future aliasing errors.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

South European Heatwaves and Their Impacts on the Power System in 2022

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-02-01 DOI: 10.1029/2024JD042310

Xinping Xu, Shengping He, Botao Zhou, Huijun Wang, Han Jiang, Changyi Liu, Bo Sun, Tienan Yin, Jie Yan

{"title":"South European Heatwaves and Their Impacts on the Power System in 2022","authors":"Xinping Xu, Shengping He, Botao Zhou, Huijun Wang, Han Jiang, Changyi Liu, Bo Sun, Tienan Yin, Jie Yan","doi":"10.1029/2024JD042310","DOIUrl":"https://doi.org/10.1029/2024JD042310","url":null,"abstract":"Unprecedented heatwaves accompanying severe droughts hit South Europe in May‒July 2022. From the interdisciplinary perspective, this study revealed that the extreme climate events can intensify European energy crisis through pushing up electricity demand and limiting renewable energy supply that makes up more than one-third of gross electricity consumption in the European Union (EU). The record-high electricity demand over South Europe in May‒July was closely associated with the long-lasting extreme heatwaves. On the other hand, the anomalous high-pressure system over Europe contributed to the severe heatwaves and the shortage of renewable power generation, for instance, through affecting the wind speed. The wind power generation over South Europe was reduced by the anomalous anticyclone which weakened low-tropospheric prevailing northwesterly wind. The results indicate a potential intensive conflict between the increasing power demand and the decreasing renewable power generation in Europe that are induced simultaneously by the extreme heatwaves. Therefore, it is suggested that the energy sectors' resilience to extreme climate events should be well built as the EU sets to significantly increase the renewable energy target to meet the goal of climate-neutral by 2050.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Simulation of Atmospheric Blocking in a High-Resolution Earth System Model: Projected Changes and Implications for Extreme Weather Events

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-02-01 DOI: 10.1029/2024JD042045

Yang Gao, Xiaojie Guo, Jian Lu, Tim Woolings, Deliang Chen, Xiuwen Guo, Wenbin Kou, Shaoqing Zhang, L. Ruby Leung, Reinhard Schiemann, Christopher H. O'Reilly, Chuncheng Guo, Jianping Li, Huiwang Gao, Lixin Wu

{"title":"Enhanced Simulation of Atmospheric Blocking in a High-Resolution Earth System Model: Projected Changes and Implications for Extreme Weather Events","authors":"Yang Gao, Xiaojie Guo, Jian Lu, Tim Woolings, Deliang Chen, Xiuwen Guo, Wenbin Kou, Shaoqing Zhang, L. Ruby Leung, Reinhard Schiemann, Christopher H. O'Reilly, Chuncheng Guo, Jianping Li, Huiwang Gao, Lixin Wu","doi":"10.1029/2024JD042045","DOIUrl":"https://doi.org/10.1029/2024JD042045","url":null,"abstract":"Atmospheric blocking is closely linked to the occurrence of extreme weather events. However, low-resolution Earth system models often underestimate the frequency of blocking, undermining confidence in future projections. In this study, we use the high-resolution Community Earth System Model (CESM-HR; 25 km atm and 10 km ocean) to show that CESM-HR reduces biases in atmospheric blocking for both winter and summer, particularly for events lasting longer than 10 days. This improvement is partly due to reduced sea surface temperature biases at higher resolution. Additionally, applying a bias correction to the 500 hPa geopotential height further enhances blocking frequency simulations, highlighting the crucial role of the mean state. Under the Representative Concentration Pathway 8.5 scenario, CESM-HR projects a decrease in wintertime blocking over regions such as the Euro-Atlantic and Chukchi-Alaska, consistent with previous studies. In contrast, summer blocking is expected to become more frequent and persistent, driven by weakened zonal winds. The blocking center shifts from historical locations over Scandinavia and eastern Russia to central Eurasia, significantly increasing blocking over the Ural region. Summer blocking frequency over the Scandinavia-Ural region may eventually surpass historical winter blocking over the Euro-Atlantic. This increase in summer blocking could exacerbate summer heatwaves in a warming climate, making severe heatwaves, like those observed recently, more common in the future.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atlantic Meridional Overturning Circulation Weakening Warmed the Southern Tibetan Plateau in Spring During the 8.2 ka Cold Event

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD042209

Xiaojian Zhang, Chunzhu Chen, Wenwei Zhao

{"title":"Atlantic Meridional Overturning Circulation Weakening Warmed the Southern Tibetan Plateau in Spring During the 8.2 ka Cold Event","authors":"Xiaojian Zhang, Chunzhu Chen, Wenwei Zhao","doi":"10.1029/2024JD042209","DOIUrl":"https://doi.org/10.1029/2024JD042209","url":null,"abstract":"Past North Atlantic abrupt cold events have the potential to provide insights into the future climatic response to the slowdown of the Atlantic meridional overturning circulation (AMOC). This study explores spring temperature changes on the southern Tibetan Plateau during the 8.2 ka cold event through simulations forced by North Atlantic freshwater hosing. Simulation results reveal anomalous warming on the southern Tibetan Plateau due to hosing-induced AMOC slowdown. This warming was primary caused by the increase of net solar flux and the presence of an anomalous warm anticyclone over the Tibetan Plateau. The enhanced net solar flux resulted from the decrease in snowfall, which led to a reduction in albedo. The snowfall was mainly reduced by the decrease in westerly moisture transport, resulting from weakened lower-level westerlies induced by AMOC-driven climate variabilities over the North Atlantic and tropical Indian Ocean. The warm anticyclone was induced by the anomalous vertical northerly shear over the southeastern Tibetan Plateau, which resulted from enhanced diabatic heating released by Asian monsoon rainfall. Asian monsoon rainfall increased due to anomalous lower-level cyclone over the tropical Indian Ocean. This anomalous cyclone was induced by the Mastuno-Gill response over the tropical Indian Ocean and amplified by a wave train propagating from the North Atlantic, both of which were resulted from the AMOC slowdown. The AMOC weakening is likely to play an important role in the recent and ongoing amplification of spring warming on the southern Tibetan Plateau.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-Infrared Atomic Oxygen Photometry of Lightning

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD042256

Jacob Wemhoner, Caitano L. da Silva, Adonis F. R. Leal, Sampath Bandara, John G. Pantuso, Richard G. Sonnenfeld

{"title":"Near-Infrared Atomic Oxygen Photometry of Lightning","authors":"Jacob Wemhoner, Caitano L. da Silva, Adonis F. R. Leal, Sampath Bandara, John G. Pantuso, Richard G. Sonnenfeld","doi":"10.1029/2024JD042256","DOIUrl":"https://doi.org/10.1029/2024JD042256","url":null,"abstract":"Measuring the temperature of lightning is a fundamental part of understanding the evolution of the plasma channel, and it is also crucial to quantify its chemical and energetic impacts in the atmosphere. Nonetheless, due to complications that have both to do with the complexity of the source and required equipment, this has only been done in a few studies to date. Here we report on the design and implementation of an instrument to perform simultaneous, multi-band optical and radio observations of lightning, which aims to provide a fast and simple way to routinely measure its temperature. The primary instrument includes photometers to measure temperature and electric field sensors to identify lightning sub-processes. Data are analyzed in tandem with 2D and 3D lightning location information. To measure the temperature, the photometer array includes 3 channels equipped with narrowband filters (1 nm) centered at bright atomic oxygen lines in the near-infrared, and temperature is given from the relative intensity of optical emissions across the 3 channels. We found the average peak temperature of 44 negative cloud-to-ground lightning return strokes to be 17,600 K. Additionally, the peak temperature had no apparent correlation to the peak current. Comparisons between 777 nm observations from the ground and from space by the Geostationary Lightning Mapper (GLM) emphasize the picture that the instruments in these two vantage points tend to see different portions of the lightning flash. They also reveal that dart leaders play a key role in the interpretation of lightning observations from space.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiple Climate Forcings Decomposed From a Tibetan Plateau Ice Core Isotope Record

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD042929

Rong Li, Zhongyin Cai, Cheng Wang, Feng Liu, Di Yang, Chenhao Xu, Songlin Yu, Xinyi Yu, Qiyao Fan, Lide Tian

{"title":"Multiple Climate Forcings Decomposed From a Tibetan Plateau Ice Core Isotope Record","authors":"Rong Li, Zhongyin Cai, Cheng Wang, Feng Liu, Di Yang, Chenhao Xu, Songlin Yu, Xinyi Yu, Qiyao Fan, Lide Tian","doi":"10.1029/2024JD042929","DOIUrl":"https://doi.org/10.1029/2024JD042929","url":null,"abstract":"Due to the impact of various climate systems, including the Asian Summer Monsoon (ASM) and westerlies, it is challenging to identify specific climate variables from the ice core δ18O records of the Tibetan Plateau (TP). Here, we disentangle the major climate modes by applying the singular spectrum analysis method to a δ18O time series in a shallow ice core retrieved from central TP. This method allows us to identify three major climate modes: the trend component, the El Niño Southern Oscillation (ENSO), and the Pacific Decadal Oscillation (PDO). The trend component mainly reflects warming in the middle and upper troposphere over the south of the TP rather than the low land surface temperature changes. Furthermore, we found that water vapor δ18O in these upper atmospheric layers positively correlates with temperature. We propose that the up-and-over transport of such water vapor to the TP contributes to the temperature signal in the ice core δ18O record, which also helps understand the increasing trend in TP ice core δ18O records during the last deglaciation. ENSO and PDO affect the intensity of the ASM through two phases: warm phases tend to weaken the monsoon, leading to higher δ18O values, whereas cool phases strengthen the monsoon, resulting in lower δ18O values. Our findings suggest that multiple climate forcings can have their specific isotopic imprints in isotopic archives and highlight the importance of analyzing the integrated effects of diverse climatic drivers. The analyses also shed light on separating different climate signals from paleoclimate records.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lowering of Tropopause and Strengthening of Tropopause Inversion Layer at Antarctica During the 2002 and 2019 Southern Sudden Stratospheric Warming Events as Seen by Radiosonde Observations and ERA5 Reanalysis

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD041872

Lingyun Yang, Shaodong Zhang, Chunming Huang, Kaiming Huang, Yun Gong, Zheng Ma, Jiahui Luo, Rui Wang

{"title":"Lowering of Tropopause and Strengthening of Tropopause Inversion Layer at Antarctica During the 2002 and 2019 Southern Sudden Stratospheric Warming Events as Seen by Radiosonde Observations and ERA5 Reanalysis","authors":"Lingyun Yang, Shaodong Zhang, Chunming Huang, Kaiming Huang, Yun Gong, Zheng Ma, Jiahui Luo, Rui Wang","doi":"10.1029/2024JD041872","DOIUrl":"https://doi.org/10.1029/2024JD041872","url":null,"abstract":"Using radiosonde and ERA5 reanalysis data, we investigated the spatial and temporal variations in the tropopause and tropopause inversion layer (TIL) in the Antarctic region during the 2002 and 2019 southern sudden stratospheric warming (SSW) events and the mechanism involved. Following these SSW events there was a sharper TIL and a warmer and lower tropopause. After the onset of rapid warming during the major SSW event in 2002 and the minor SSW event in 2019, the magnitudes of these anomalies increased and reached their respective first peaks. The anomalies increased and peaked again following the early final breakdown of the polar vortex (i.e., the switch to summer circulation). During the SSW events and final breakdown of the polar vortex in 2002 and 2019, stratospheric residual mean circulation, which was driven by planetary waves, was the primary cause of these anomalies. The adiabatic heating of the anomalous downwelling residual mean circulation above the tropopause led to a decrease in the tropopause height and a warming of the tropopause temperature. It also led to increased static stability near the tropopause by dynamical heating, which represented a strengthened TIL. In addition, approximately 4% and 1.9% of the strengthening of the TIL in 2002 and 2019, respectively, can be attributed to the increased anticyclonic circulation at the tropopause.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Contrasting Roles of Land and Oceanic Moisture Contributions to Summer Rainfall Over the Southeastern United States

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD042039

C. M. Sala, E. Zorzetto, L. Li

{"title":"The Contrasting Roles of Land and Oceanic Moisture Contributions to Summer Rainfall Over the Southeastern United States","authors":"C. M. Sala, E. Zorzetto, L. Li","doi":"10.1029/2024JD042039","DOIUrl":"https://doi.org/10.1029/2024JD042039","url":null,"abstract":"Summer precipitation in the Southeast United States (SEUS) is classified into three categories—light, moderate, and heavy—using a Bayesian statistical model. We find that heavy rainfall events explain most of the interannual variance of summertime cumulative precipitation in the region, influencing regional hydroclimate patterns. For each rainfall category, we track the respective moisture sources using the 2-Layers Water Accounting Model driven by reanalysis data. We find that the Atlantic Ocean is the primary moisture source across all rainfall categories and becomes more important with increasing rainfall intensity. Conversely, land moisture contributions decrease with rainfall intensity. In the case of heavy rainfall, the moisture originating from the Atlantic Ocean is transported to the SEUS via a southeastward positioning of the North Atlantic Subtropical High (NASH) Western Ridge. The ample supply of moisture fluxes is further propelled by reduced surface pressure which promotes ascending motion in the SEUS. Analysis of mid-troposphere circulation indicates that this anomalous low-pressure might stem from wave trains originating over the North Pacific Ocean. Thus, heavy rainfall events involve increased Atlantic Ocean moisture fluxes directed by the NASH to the SEUS, which, in turn, is modulated by anomalous atmospheric circulation produced over the Pacific Ocean. Furthermore, we observe that the heavy and moderate (light) rainfall event frequency has increased (decreased) by five days throughout the 1970–2019 analysis period.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Black Carbon Reflects Extremely Efficient Aerosol Wet Removal in Monsoonal Convective Transport

IF 3.8 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-01-31 DOI: 10.1029/2024JD042692

J. Berberich, S. A. Jacoby, G. Michailoudi, J. P. Schwarz, S. Viciani, F. D’Amato, G. Bianchini, M. Barucci, T. Campos, K. Ullman, J. R. Podolske, C. Gurganus, W. P. Smith, R. Ueyama, S. B. Honomichl, L. L. Pan, S. Woods, B. Wienzierl, M. Dollner, A. E. Perring

{"title":"Black Carbon Reflects Extremely Efficient Aerosol Wet Removal in Monsoonal Convective Transport","authors":"J. Berberich, S. A. Jacoby, G. Michailoudi, J. P. Schwarz, S. Viciani, F. D’Amato, G. Bianchini, M. Barucci, T. Campos, K. Ullman, J. R. Podolske, C. Gurganus, W. P. Smith, R. Ueyama, S. B. Honomichl, L. L. Pan, S. Woods, B. Wienzierl, M. Dollner, A. E. Perring","doi":"10.1029/2024JD042692","DOIUrl":"https://doi.org/10.1029/2024JD042692","url":null,"abstract":"Refractory black carbon (rBC) is a primary aerosol species, produced through incomplete combustion, that absorbs sunlight and contributes to positive radiative forcing. The overall climate effect of rBC depends on its spatial distribution and atmospheric lifetime, both of which are impacted by the efficiency with which rBC is transported or removed by convective systems. These processes are poorly constrained by observations. It is especially interesting to investigate rBC transport efficiency through the Asian Summer Monsoon (ASM) since this meteorological pattern delivers vast quantities of boundary layer air from Asia, where rBC emissions are high to the upper troposphere/lower stratosphere (UT/LS) where the lifetime of rBC is expected to be long. Here, we present in situ observations of rBC made during the Asian Summer Monsoon Chemistry and Climate Impact Project of summer, 2022. We use observed relationships between rBC and CO in ASM outflow to show that rBC is removed nearly completely (>98%) from uplifted air and that rBC concentrations in ASM outflow are statistically indistinguishable from the UT/LS background. We compare observed rBC and CO concentrations to those expected based on two chemical transport models and find that the models reproduce CO to within a factor of 2 at all altitudes whereas rBC is overpredicted by a factor of 20–100 at altitudes associated with ASM outflow. We find that the rBC particles in recently convected air have thinner coatings than those found in the UTLS background, suggesting transport of a small number of rBC particles that are negligible for concentration.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0