Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD030027 |
Aerosol Impacts on Mesoscale Convective Systems Forming Under Different Vertical Wind Shear Conditions | |
Chen, Qian1,2; Fan, Jiwen2; Yin, Yan1; Han, Bin2,3 | |
2020-02-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Following our previous study of wind shear effect on mesoscale convective system (MCS) organization under a clean atmospheric condition using the Weather Research and Forecasting model coupled with spectral-bin microphysics, we conduct sensitivity simulations by increasing cloud condensation nuclei concentration to investigate aerosol impacts on MCSs forming under different wind shear conditions. We find that increased aerosols induce stronger updrafts and downdrafts in all MCSs. The stronger updrafts and enlarged convective core area contribute to larger vertical mass fluxes and enhance precipitation. The enhanced updrafts and vertical mass fluxes indicate convective invigoration. Increased updraft speed below 8-km altitude is attributed to enhanced condensational heating, except for the weak wind shear and strong low-level shear cases in which the enhanced low-level convergence is another contributing factor. Interestingly, above 8-km altitude, we see reduced updraft speed by the increased aerosols due to reduced vertical pressure perturbation gradient force. The accumulated rainfall and mean rain rate are increased with a greater occurrence frequency of heavy rain. Larger rain rate is seen in both convective and stratiform regions. In general, we see a higher frequency of deep clouds in the polluted condition because of invigorated convection, and more stratiform/anvil clouds, but a lower frequency of shallow warm clouds, with a larger significance for more organized MCSs. The consistently invigorated MCSs by aerosols under various wind shear conditions revealed by this study have important implications to weather and climate in warm and humid regions that are influenced by pollution. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521086600023 |
WOS关键词 | PRECIPITATION ; MICROPHYSICS ; INTENSITY ; CLOUDS ; SENSITIVITY ; STORMS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280038 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Aerosol Cloud Precipitat, China Meteorol Adm, Nanjing, Peoples R China; 2.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA; 3.Nanjing Univ, Sch Atmospher Sci, Nanjing, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Qian,Fan, Jiwen,Yin, Yan,et al. Aerosol Impacts on Mesoscale Convective Systems Forming Under Different Vertical Wind Shear Conditions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(3). |
APA | Chen, Qian,Fan, Jiwen,Yin, Yan,&Han, Bin.(2020).Aerosol Impacts on Mesoscale Convective Systems Forming Under Different Vertical Wind Shear Conditions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(3). |
MLA | Chen, Qian,et al."Aerosol Impacts on Mesoscale Convective Systems Forming Under Different Vertical Wind Shear Conditions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.3(2020). |
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