Arid
DOI10.1016/j.atmosenv.2012.12.036
Impact of elevated aerosol layer on the cloud macrophysical properties prior to monsoon onset
Dipu, S.1; Prabha, Thara V.1; Pandithurai, G.1; Dudhia, J.2; Pfister, G.2; Rajesh, K.3; Goswami, B. N.1
通讯作者Dipu, S.
来源期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
EISSN1873-2844
出版年2013
卷号70页码:454-467
英文摘要

Atmospheric aerosols alter the radiation balance by absorption/scattering of solar radiation, and indirectly by modifying the cloud microphysical properties. Observations during the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) provide a unique opportunity to investigate the aerosol-cloud interaction in a dry to wet transition phase prior to the onset of southwest monsoon. It is observed that aerosol loading increased over the central Indian region in spite of the increase in surface rainfall. This aerosol loading was observed mainly in the 2-5 km level above surface. The origin and influence of elevated aerosol layer have been investigated with the help of WRF-Chem simulations by conducting sensitivity experiments for dust emissions, modified based on the satellite observations. To enhance the dust emissions, the erodible fraction over the Thar Desert region is enhanced to an average factor of 1.7 based on TOMS aerosol index (AI) and USGS land use category, which contributed to enhanced dust emissions by a factor of 1.25 over the study region. This enhancement of dust emission from That Desert can result in an increased radiative heating due to elevated aerosol layers, which leads to an increase in the ice mixing ratio and ice water content in the regions of dry to wet transition. It is shown that even natural dust emissions (without changes in anthropogenic emissions) may also influence the spatial and temporal distribution of cloud and precipitation and the hydrological cycle. (C) 2013 Elsevier Ltd. All rights reserved.


英文关键词Elevated aerosol layer Aerosol optical depth Atmospheric heating Aerosol flux Cloud macrophysics
类型Article
语种英语
国家India ; USA
收录类别SCI-E
WOS记录号WOS:000317158600045
WOS关键词RADIATIVE-TRANSFER ; SOLAR-RADIATION ; MINERAL DUST ; MODEL ; CLIMATE ; SATELLITE ; CHEMISTRY ; EMISSIONS ; AFRICA ; GOCART
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176006
作者单位1.Indian Inst Trop Meteorol, Pune, Maharashtra, India;
2.Natl Ctr Atmospher Res, Boulder, CO 80307 USA;
3.Aryabhatta Res Inst Observat Sci, Naini Tal, India
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Dipu, S.,Prabha, Thara V.,Pandithurai, G.,et al. Impact of elevated aerosol layer on the cloud macrophysical properties prior to monsoon onset[J]. Arizona State University,2013,70:454-467.
APA Dipu, S..,Prabha, Thara V..,Pandithurai, G..,Dudhia, J..,Pfister, G..,...&Goswami, B. N..(2013).Impact of elevated aerosol layer on the cloud macrophysical properties prior to monsoon onset.ATMOSPHERIC ENVIRONMENT,70,454-467.
MLA Dipu, S.,et al."Impact of elevated aerosol layer on the cloud macrophysical properties prior to monsoon onset".ATMOSPHERIC ENVIRONMENT 70(2013):454-467.
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