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DOI	10.5194/acp-20-15389-2020
	Aerosol-enhanced high precipitation events near the Himalayan foothills
	Choudhury G.; Tyagi B.; Krishna Vissa N.; Singh J.; Sarangi C.; Nand Tripathi S.; Tesche M.
发表日期	2020
ISSN	1680-7316
起始页码	15389
结束页码	15399
卷号	20 期号:23
英文摘要	Particulate emissions can alter the physical and dynamical properties of cloud systems and, in turn, amplify rainfall events over orographic regions downwind of highly polluted urban areas. The Indo-Gangetic Plain, one of the most polluted regions of the world, is located upwind of the Himalayan foothills. The region, therefore, provides an opportunity for studying how aerosol effects, in connection with orographic forcing, affect extreme rainfall events. This study uses 17 years (2001-2017) of observed rain rate, aerosol optical depth (AOD), meteorological reanalysis fields and outgoing long-wave radiation to investigate high precipitation events on the foothills of the Himalayas. Composite analysis of all these co-located data sets for high precipitation events (daily rainfall > 95th percentile) is done to understand the inherent dynamics and linkages between the AOD and extreme events. Clear and robust associations are found between high precipitation events, high aerosol loading and high moist static energy values. Results show an average increase in AOD by 36 %, along with an average increase in low-level moist static energy (1000-850 hPa) by ≈ 1500 Jkg-1 inside the selected domain for high precipitation events. The finding highlights the crucial role of the aerosol direct radiative effect on high precipitation events over the Himalayan region. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; composite; data set; longwave radiation; optical depth; orographic effect; precipitation quality; Gangetic Plain; Himalayas
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247286
作者单位	Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India; Leipzig Institute for Meteorology (LIM), University of Leipzig, Stephanstraße 3, Leipzig, 04103, Germany; Shanti Raj Bhawan, Paramhans Nagar, Kandwa, Varanasi, 221106, India; Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, 600024, India; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India; Department of Earth Sciences, Indian Institute of Technology Kanpur, Kanpur, 208016, India
推荐引用方式 GB/T 7714	Choudhury G.,Tyagi B.,Krishna Vissa N.,et al. Aerosol-enhanced high precipitation events near the Himalayan foothills[J],2020,20(23).
APA	Choudhury G..,Tyagi B..,Krishna Vissa N..,Singh J..,Sarangi C..,...&Tesche M..(2020).Aerosol-enhanced high precipitation events near the Himalayan foothills.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(23).
MLA	Choudhury G.,et al."Aerosol-enhanced high precipitation events near the Himalayan foothills".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.23(2020).