Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-12025-2019 |
Quantifying snow darkening and atmospheric radiative effects of black carbon and dust on the South Asian monsoon and hydrological cycle: experiments using variable-resolution CESM | |
Rahimi, Stefan1; Liu, Xiaohong1; Wu, Chenglai1,2; Lau, William K.3; Brown, Hunter1; Wu, Mingxuan1; Qian, Yun4 | |
2019-09-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:18页码:12025-12049 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Black carbon (BC) and dust impart significant effects on the South Asian monsoon (SAM), which is responsible for similar to 80 % of the region's annual precipitation. This study implements a variable-resolution (VR) version of the Community Earth System Model (CESM) to quantify two radiative effects of absorbing BC and dust on the SAM. Specifically, this study focuses on the snow darkening effect (SDE), as well as how these aerosols interact with incoming and outgoing radiation to facilitate an atmospheric response (i.e., aerosol-radiation interactions, ARIs). By running sensitivity experiments, the individual effects of SDE and ARI are quantified, and a theoretical framework is applied to assess these aerosols' impacts on the SAM. It is found that ARIs of absorbing aerosols warm the atmospheric column in a belt coincident with the May-June averaged location of the subtropical jet, bringing forth anomalous upper-tropospheric (lower-tropospheric) anticyclogenesis (cyclogenesis) and divergence (convergence). This anomalous arrangement in the mass fields brings forth enhanced rising vertical motion across South Asia and a stronger westerly low-level jet, the latter of which furnishes the Indian subcontinent with enhanced Arabian Gulf moisture. Precipitation increases of 2 mm d(-1) or more (a 60% increase in June) result across much of northern India from May through August, with larger anomalies (+5 to +10 mm d(-1)) in the western Indian mountains and southern Tibetan Plateau (TP) mountain ranges due to orographic and anabatic enhancement. Across the Tibetan Plateau foothills, SDE by BC aerosols drives large precipitation anomalies of > 6 mm d(-1) (a 21 %-26% increase in May and June), comparable to ARI of absorbing aerosols from April through August. Runoff changes accompany BC SDE-induced snow changes across Tibet, while runoff changes across India result predominantly from dust ARI. Finally, there are large differences in the simulated SDE between the VR and traditional 1 degrees simulations, the latter of which simulates a much stronger SDE and more effectively modifies the regional circulation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488023500003 |
WOS关键词 | INDIAN-SUMMER MONSOON ; AEROSOL OPTICAL-PROPERTIES ; HIGH-ALTITUDE SITE ; TIBETAN PLATEAU ; PRECIPITATION VARIABILITY ; CHEMICAL-COMPOSITION ; CLIMATE SIMULATIONS ; MINERAL DUST ; LONG-TERM ; IMPACTS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/187144 |
专题 | 地球科学 |
作者单位 | 1.Univ Wyoming, Dept Atmospher Sci, 1000 E Univ,1000 E Univ Ave, Laramie, WY 82071 USA; 2.Chinese Acad Sci, Inst Atmospher Phys, Int Ctr Climate & Environm Sci, Beijing 100029, Peoples R China; 3.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 4.Pacific Northwest Natl Lab, Atmospher Sci & Global Change, POB 999, Richland, WA 99352 USA |
推荐引用方式 GB/T 7714 | Rahimi, Stefan,Liu, Xiaohong,Wu, Chenglai,et al. Quantifying snow darkening and atmospheric radiative effects of black carbon and dust on the South Asian monsoon and hydrological cycle: experiments using variable-resolution CESM[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(18):12025-12049. |
APA | Rahimi, Stefan.,Liu, Xiaohong.,Wu, Chenglai.,Lau, William K..,Brown, Hunter.,...&Qian, Yun.(2019).Quantifying snow darkening and atmospheric radiative effects of black carbon and dust on the South Asian monsoon and hydrological cycle: experiments using variable-resolution CESM.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(18),12025-12049. |
MLA | Rahimi, Stefan,et al."Quantifying snow darkening and atmospheric radiative effects of black carbon and dust on the South Asian monsoon and hydrological cycle: experiments using variable-resolution CESM".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.18(2019):12025-12049. |
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