气候变化领域集成服务门户(CCPortal): Reduced European aerosol emissions suppress winter extremes over northern Eurasia

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DOI	10.1038/s41558-020-0693-4
	Reduced European aerosol emissions suppress winter extremes over northern Eurasia
	Wang Y.; Le T.; Chen G.; Yung Y.L.; Su H.; Seinfeld J.H.; Jiang J.H.
发表日期	2020
ISSN	1758678X
卷号	10 期号:3
英文摘要	Winter extreme weather events receive major public attention due to their serious impacts1, but the dominant factors regulating their interdecadal trends have not been clearly established2,3. Here, we show that the radiative forcing due to geospatially redistributed anthropogenic aerosols mainly determined the spatial variations of winter extreme weather in the Northern Hemisphere during 1970–2005, a unique transition period for global aerosol forcing4. Over this period, the local Rossby wave activity and extreme events (top 10% in wave amplitude) exhibited marked declining trends at high latitudes, mainly in northern Eurasia. The combination of long-term observational data and a state-of-the-art climate model revealed the unambiguous signature of anthropogenic aerosols on the wintertime jet stream, planetary wave activity and surface temperature variability on interdecadal timescales. In particular, warming due to aerosol reductions in Europe enhanced the meridional temperature gradient on the jet’s poleward flank and strengthened the zonal wind, resulting in significant suppression in extreme events over northern Eurasia. These results exemplify how aerosol forcing can impact large-scale extratropical atmospheric dynamics, and illustrate the importance of anthropogenic aerosols and their spatiotemporal variability in assessing the drivers of extreme weather in historical and future climate. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124202
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Divisions of Chemistry and Chemical Engineering and Engineering and Applied Science, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Wang Y.,Le T.,Chen G.,et al. Reduced European aerosol emissions suppress winter extremes over northern Eurasia[J],2020,10(3).
APA	Wang Y..,Le T..,Chen G..,Yung Y.L..,Su H..,...&Jiang J.H..(2020).Reduced European aerosol emissions suppress winter extremes over northern Eurasia.Nature Climate Change,10(3).
MLA	Wang Y.,et al."Reduced European aerosol emissions suppress winter extremes over northern Eurasia".Nature Climate Change 10.3(2020).