气候变化领域集成服务门户(CCPortal): Disentangling the influence of local and remote anthropogenic aerosols on South Asian monsoon daily rainfall characteristics

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DOI	10.1007/s00382-018-4512-9
	Disentangling the influence of local and remote anthropogenic aerosols on South Asian monsoon daily rainfall characteristics
	Singh D.; Bollasina M.; Ting M.; Diffenbaugh N.S.
发表日期	2019
ISSN	0930-7575
起始页码	6301
结束页码	6320
卷号	52 期号:2020-09-10
英文摘要	Wet and dry periods within the South Asian summer monsoon season can have acute societal impacts. Recent studies have identified changes in daily rainfall characteristics of the monsoon, but the underlying causes are poorly understood. In particular, although the dominant role of anthropogenic aerosols in shaping historical changes in seasonal-mean monsoon rainfall has been documented, their influence on daily-scale rainfall remains unconstrained. Using an ensemble of single-forcing climate simulations, we find that anthropogenic aerosols have a stronger influence on late-twentieth century changes in the frequency of wet events, dry events and rainless days, compared with other climate forcings. We also investigate the role of aerosol-cloud interactions (“indirect effects”) in the total aerosol response, and the contribution of aerosols emitted from South Asia versus from remote sources. Based on additional simulations with the GFDL-CM3 climate model, we find that the simulated aerosol response over South Asia is largely associated with aerosol-indirect effects. In addition, local aerosols suppress wet-event frequency and enhance dry-event frequency over eastern-central India, where increases in aerosol loading are the largest. Remote aerosols cause a north–south dipole pattern of change in mean rainfall over India and fewer rainless days over western India. However, the overall spatial response of South Asian rainfall characteristics to total aerosol forcing is substantially influenced by the combined non-linear climate response to local and remote aerosols. Together, our results suggest that understanding the influence of different aerosol emissions trajectories on the regional climate dynamics is critical for effective climate-risk management in this populated, vulnerable region. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Anthropogenic aerosols; Daily-scale precipitation; Local and remote aerosols; South Asian Monsoon
语种	英语
scopus关键词	aerosol; monsoon; precipitation (climatology); rainfall; regional climate; summer
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146308
作者单位	School of the Environment, Washington State University, Vancouver, WA 98686, United States; Lamont Doherty Earth Observatory, Columbia University, New York City, NY, United States; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; Department of Earth and Environmental Sciences, Columbia University, New York City, NY, United States; Department of Earth System Science, Stanford University, Stanford, CA, United States; Woods Institute for the Environment, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Singh D.,Bollasina M.,Ting M.,et al. Disentangling the influence of local and remote anthropogenic aerosols on South Asian monsoon daily rainfall characteristics[J],2019,52(2020-09-10).
APA	Singh D.,Bollasina M.,Ting M.,&Diffenbaugh N.S..(2019).Disentangling the influence of local and remote anthropogenic aerosols on South Asian monsoon daily rainfall characteristics.Climate Dynamics,52(2020-09-10).
MLA	Singh D.,et al."Disentangling the influence of local and remote anthropogenic aerosols on South Asian monsoon daily rainfall characteristics".Climate Dynamics 52.2020-09-10(2019).