气候变化领域集成服务门户(CCPortal): Strong large-scale climate response to North American sulphate aerosols in CESM

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DOI	10.1088/1748-9326/abbe45
	Strong large-scale climate response to North American sulphate aerosols in CESM
	García-Martínez I.M.; Bollasina M.A.; Undorf S.
发表日期	2020
ISSN	17489318
卷号	15 期号:11
英文摘要	The effects of increased North American sulphate aerosol emissions on the climate of Mexico and the United States (U.S.) during 1950-1975 are investigated by using two sets of transient coupled experiments with the Community Earth System Model, one with historically evolving emissions, and a second one where North American SO2 emissions are kept at their pre-industrial levels. The 1950-1975 increase in North American sulphate aerosols is found to have regional and remote impact. Over central U.S. and northern Mexico, the strengthening and westward expansion of the North Atlantic Subtropical High and subsequent intensification of the low-level easterlies, along with local aerosol interactions with radiation and clouds, cause a cooling trend and enhance precipitation. The interaction between the enhanced moisture transport across the Gulf of Mexico and the elevated topography of central Mexico favours positive rainfall on the Atlantic side while suppressing it on the Pacific side. These continental anomalies are embedded in a hemispheric-wide upper-tropospheric teleconnection pattern over the mid-latitudes, extending from the Pacific to the Atlantic basin. Details of the underlying mechanisms - in particular the prominent role of dynamical adjustments - are provided. With SO2 emissions considerably reduced in the U.S., and the expectation of a continued global decline throughout the 21st century, this study sheds light upon possible ongoing and future regional climate responses to changes in anthropogenic forcing. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	anthropogenic aerosols; atmospheric circulation; hydroclimate change
语种	英语
scopus关键词	Aerosols; Earth (planet); Industrial emissions; Precipitation (meteorology); Sulfur dioxide; Topography; Anthropogenic forcing; Climate response; Earth system model; Moisture transport; Pre-industrial levels; Regional climate; Sulphate aerosol; Teleconnection patterns; Climate models; aerosol; climate change; sulfate; North America
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153480
作者单位	School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Department of Meteorology, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	García-Martínez I.M.,Bollasina M.A.,Undorf S.. Strong large-scale climate response to North American sulphate aerosols in CESM[J],2020,15(11).
APA	García-Martínez I.M.,Bollasina M.A.,&Undorf S..(2020).Strong large-scale climate response to North American sulphate aerosols in CESM.Environmental Research Letters,15(11).
MLA	García-Martínez I.M.,et al."Strong large-scale climate response to North American sulphate aerosols in CESM".Environmental Research Letters 15.11(2020).