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DOI	10.5194/acp-19-9081-2019
	Mechanisms for a remote response to Asian anthropogenic aerosol in boreal winter
	Wilcox L.; Dunstone N.; Lewinschal A.; Bollasina M.; Ekman A.; Highwood E.
发表日期	2019
ISSN	16807316
起始页码	9081
结束页码	9095
卷号	19 期号:14
英文摘要	Asian emissions of anthropogenic aerosols and their precursors have increased rapidly since 1980, with half of the increase since the pre-industrial era occurring in this period. Transient experiments with the HadGEM3-GC2 coupled model were designed to isolate the impact of Asian anthropogenic aerosols on global climate in boreal winter. It is found that this increase has resulted in local circulation changes, which in turn have driven decreases in precipitation over China, alongside an intensification of the offshore monsoon flow. No large temperature changes are seen over China. Over India, the opposite response is found, with decreasing temperatures and increasing precipitation. The dominant feature of the local circulation changes is an increase in low-level convergence, ascent, and precipitation over the Maritime Continent, which forms part of a tropical Pacific-wide La Niña-like response. HadGEM3-GC2 also simulates pronounced far-field responses. A decreased meridional temperature gradient in the North Pacific leads to a positive Pacific-North American circulation pattern, with associated temperature anomalies over the North Pacific and North America. Anomalous northeasterly flow over northeast Europe drives advection of cold air into central and western Europe, causing cooling in this region. An anomalous anticyclonic circulation over the North Atlantic causes drying over western Europe. Using a steady-state primitive equation model, LUMA, we demonstrate that these far-field midlatitude responses arise primarily as a result of Rossby waves generated over China, rather than in the equatorial Pacific. © 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol; aerosol composition; anthropogenic source; anticyclone; atmospheric circulation; concentration (composition); Rossby wave; seasonal variation; China
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/144277
作者单位	National Centre for Atmospheric Science, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Department of Meteorology, Stockholm University, Stockholm, Sweden; School of Geosciences, Grant Institute, University of Edinburgh, Edinburgh, United Kingdom
推荐引用方式 GB/T 7714	Wilcox L.,Dunstone N.,Lewinschal A.,et al. Mechanisms for a remote response to Asian anthropogenic aerosol in boreal winter[J],2019,19(14).
APA	Wilcox L.,Dunstone N.,Lewinschal A.,Bollasina M.,Ekman A.,&Highwood E..(2019).Mechanisms for a remote response to Asian anthropogenic aerosol in boreal winter.Atmospheric Chemistry and Physics,19(14).
MLA	Wilcox L.,et al."Mechanisms for a remote response to Asian anthropogenic aerosol in boreal winter".Atmospheric Chemistry and Physics 19.14(2019).