Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-11637-2017 |
Potential impact of carbonaceous aerosol on the upper troposphere and lower stratosphere (UTLS) and precipitation during Asian summer monsoon in a global model simulation | |
Fadnavis, Suvarna1; Kalita, Gayatry1; Kumar, K. Ravi1,4; Gasparini, Blaz2; Li, Jui-Lin Frank3 | |
2017-09-28 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | India; Switzerland; USA; Saudi Arabia |
英文摘要 | Recent satellite observations show efficient vertical transport of Asian pollutants from the surface to the upper-level anticyclone by deep monsoon convection. In this paper, we examine the transport of carbonaceous aerosols, including black carbon (BC) and organic carbon (OC), into the monsoon anticyclone using of ECHAM6-HAM, a global aerosol climate model. Further, we investigate impacts of enhanced (doubled) carbonaceous aerosol emissions on the upper troposphere and lower stratosphere (UTLS), underneath monsoon circulation and precipitation from sensitivity simulations. The model simulation shows that boundary layer aerosols are transported into the monsoon anticyclone by the strong monsoon convection from the Bay of Bengal, southern slopes of the Himalayas and the South China Sea. Doubling of emissions of both BC and OC aerosols over Southeast Asia (10 degrees S-50 degrees N, 65-155 degrees E) shows that lofted aerosols produce significant warming (0.6-1 K) over the Tibetan Plateau (TP) near 400-200 hPa and instability in the middle/upper troposphere. These aerosols enhance radiative heating rates (0.02-0.03K day(-1)) near the tropopause. The enhanced carbonaceous aerosols alter aerosol radiative forcing (RF) at the surface by -4.74 +/- 1.42Wm(-2), at the top of the atmosphere (TOA) by +0.37 +/- 0.26W m(-2) and in the atmosphere by + 5.11 +/- 0.83Wm(-2) over the TP and Indo-Gangetic Plain region (15-35 degrees N, 80-110 degrees E). Atmospheric warming increases vertical velocities and thereby cloud ice in the upper troposphere. Aerosol induced anomalous warming over the TP facilitates the relative strengthening of the monsoon Hadley circulation and increases moisture inflow by strengthening the cross-equatorial monsoon jet. This increases precipitation amounts over India (1-4mm day(-1)) and eastern China (0.2-2mm day(-1)). These results are significant at the 99% confidence level. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411884400004 |
WOS关键词 | TROPICAL TROPOPAUSE LAYER ; BLACK CARBON ; TIBETAN PLATEAU ; INTERANNUAL VARIABILITY ; WATER-VAPOR ; PEROXYACETYL NITRATE ; TRANSPORT PATHWAYS ; CIRRUS CLOUDS ; HUMAN HEALTH ; SOUTH-ASIA |
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/23856 |
专题 | 地球科学 |
作者单位 | 1.Indian Inst Trop Meteorol, Pune, Maharashtra, India; 2.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland; 3.CALTECH, Jet Prop Lab, Pasadena, CA USA; 4.King Abdullah Univ Sci & Technol, Thuwal, Saudi Arabia |
推荐引用方式 GB/T 7714 | Fadnavis, Suvarna,Kalita, Gayatry,Kumar, K. Ravi,et al. Potential impact of carbonaceous aerosol on the upper troposphere and lower stratosphere (UTLS) and precipitation during Asian summer monsoon in a global model simulation[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(18). |
APA | Fadnavis, Suvarna,Kalita, Gayatry,Kumar, K. Ravi,Gasparini, Blaz,&Li, Jui-Lin Frank.(2017).Potential impact of carbonaceous aerosol on the upper troposphere and lower stratosphere (UTLS) and precipitation during Asian summer monsoon in a global model simulation.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(18). |
MLA | Fadnavis, Suvarna,et al."Potential impact of carbonaceous aerosol on the upper troposphere and lower stratosphere (UTLS) and precipitation during Asian summer monsoon in a global model simulation".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.18(2017). |
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