气候变化领域集成服务门户(CCPortal): How Asian aerosols impact regional surface temperatures across the globe

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DOI	10.5194/acp-21-5865-2021
	How Asian aerosols impact regional surface temperatures across the globe
	Merikanto J.; Nordling K.; Räisänen P.; Räisänen J.; O'donnell D.; Partanen A.-I.; Korhonen H.
发表日期	2021
ISSN	1680-7316
起始页码	5865
结束页码	5881
卷号	21 期号:8
英文摘要	South and East Asian anthropogenic aerosols mostly reside in an air mass extending from the Indian Ocean to the North Pacific. Yet the surface temperature effects of Asian aerosols spread across the whole globe. Here, we remove Asian anthropogenic aerosols from two independent climate models (ECHAM6.1 and NorESM1) using the same representation of aerosols via MACv2-SP (a simple plume implementation of the second version of the Max Planck Institute Aerosol Climatology). We then robustly decompose the global distribution of surface temperature responses into contributions from atmospheric energy flux changes. We find that the horizontal atmospheric energy transport strongly moderates the surface temperature response over the regions where Asian aerosols reside. Atmospheric energy transport and changes in clear-sky longwave radiation redistribute the temperature effects efficiently across the Northern Hemisphere and to a lesser extent also over the Southern Hemisphere. The model-mean global surface temperature response to Asian anthropogenic aerosol removal is 0.26±0.04 °C (0.22±0.03 for ECHAM6.1 and 0.30±0.03 °C for NorESM1) of warming. Model-to-model differences in global surface temperature response mainly arise from differences in longwave cloud (0.01±0.01 for ECHAM6.1 and 0.05±0.01 °C for NorESM1) and shortwave cloud (0.03±0.03 for ECHAM6.1 and 0.07±0.02 °C for NorESM1) responses. The differences in cloud responses between the models also dominate the differences in regional temperature responses. In both models, the northern-hemispheric surface warming amplifies towards the Arctic, where the total temperature response is highly seasonal and weakest during the Arctic summer. We estimate that under a strong Asian aerosol mitigation policy tied with strong climate mitigation (Shared Socioeconomic Pathway 1-1.9) the Asian aerosol reductions can add around 8 years' worth of current-day global warming during the next few decades. © Author(s) 2021.
语种	英语
scopus关键词	aerosol; atmospheric transport; climate modeling; decomposition analysis; longwave radiation; regional climate; surface temperature; Asia; Indian Ocean; Pacific Ocean; Pacific Ocean (North)
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/246968
作者单位	Finnish Meteorological Institute, Helsinki, Finland; INAR Physics, University of Helsinki, Helsinki, Finland
推荐引用方式 GB/T 7714	Merikanto J.,Nordling K.,Räisänen P.,et al. How Asian aerosols impact regional surface temperatures across the globe[J],2021,21(8).
APA	Merikanto J..,Nordling K..,Räisänen P..,Räisänen J..,O'donnell D..,...&Korhonen H..(2021).How Asian aerosols impact regional surface temperatures across the globe.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Merikanto J.,et al."How Asian aerosols impact regional surface temperatures across the globe".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).