气候变化领域集成服务门户(CCPortal): Consistent signal of aerosol indirect and semi-direct effect on water clouds in the oceanic regions adjacent to the Indian subcontinent

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DOI	10.1016/j.atmosres.2019.104677
	Consistent signal of aerosol indirect and semi-direct effect on water clouds in the oceanic regions adjacent to the Indian subcontinent
	Rao S.; Dey S.
发表日期	2020
ISSN	0169-8095
卷号	232
英文摘要	Quantifying aerosol-cloud interaction is one of the most challenging tasks in climate science. Previous studies in the oceanic regions adjacent to the Indian subcontinent providing evidence of aerosol impacts on cloud properties were mostly confined in the winter season. Here we analyze 15 years (March 2000–February 2015) of MODIS aerosol and cloud products and 10 years (October 2004–February 2015) of OMI absorbing aerosol index (AI) over the Arabian Sea (AS), Bay of Bengal (BoB) and South Indian Ocean (SIO) to examine the sensitivity of marine water cloud characteristics to changing aerosol loading. Amidst a monotonous increase in Reff (cloud effective radius) with an increase in LWP (liquid water path) in clean and polluted conditions (an indicator of the meteorological influence), a smaller Reff at higher AOD (aerosol optical depth) bins demonstrates that aerosol signal is detectable and consistent in LWP range of 150–350 g m−2. Furthermore, a faster rate of Reff growth with increasing LWP in clean condition and the pattern of change in cloud fraction (fc) with an increase in AOD that cannot be explained by meteorology alone also provide evidence of the consistency of aerosol indirect effect. Evidence of aerosol semi-direct (decrease of LWP with an increase in AI) is also conspicuous in the AS and BoB. Our results suggest improved representations of aerosol and cloud processes in the models are required to reduce uncertainty in regional climate forcing. © 2019 Elsevier B.V.
学科领域	Climate models; Oceanography; Absorbing aerosol indices; Aerosol indirect effect; Aerosol optical depths; Aerosol-cloud interaction; Cloud effective radius; Indian subcontinents; Meteorological influence; South Indian Ocean; Aerosols; aerosol; climate forcing; meteorology; optical depth; uncertainty analysis; Arabian Sea; Bay of Bengal; India; Indian Ocean; Indian Ocean (South)
语种	英语
scopus关键词	Climate models; Oceanography; Absorbing aerosol indices; Aerosol indirect effect; Aerosol optical depths; Aerosol-cloud interaction; Cloud effective radius; Indian subcontinents; Meteorological influence; South Indian Ocean; Aerosols; aerosol; climate forcing; meteorology; optical depth; uncertainty analysis; Arabian Sea; Bay of Bengal; India; Indian Ocean; Indian Ocean (South)
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120584
作者单位	Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, 110016, India
推荐引用方式 GB/T 7714	Rao S.,Dey S.. Consistent signal of aerosol indirect and semi-direct effect on water clouds in the oceanic regions adjacent to the Indian subcontinent[J],2020,232.
APA	Rao S.,&Dey S..(2020).Consistent signal of aerosol indirect and semi-direct effect on water clouds in the oceanic regions adjacent to the Indian subcontinent.Atmospheric Research,232.
MLA	Rao S.,et al."Consistent signal of aerosol indirect and semi-direct effect on water clouds in the oceanic regions adjacent to the Indian subcontinent".Atmospheric Research 232(2020).