气候变化领域集成服务门户(CCPortal): Revisiting the Impact of Sea Salt on Climate Sensitivity

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DOI	10.1029/2019GL085601
	Revisiting the Impact of Sea Salt on Climate Sensitivity
	Paulot F.; Paynter D.; Winton M.; Ginoux P.; Zhao M.; Horowitz L.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Recent laboratory and field studies point to an increase of sea salt aerosol (SSA) emissions with temperature, suggesting that SSA may lower climate sensitivity. We assess the impact of a strong (4.2% K -1) and weak (0.7% K -1) temperature response of SSA emissions on the climate sensitivity of the coupled climate model CM4. We find that the stronger temperature dependence improves the simulation of marine aerosol optical depth sensitivity to temperature and lowers CM4 Transient Climate Response (-0.125 K), and Equilibrium Climate Sensitivity (-0.5 K). At CO2 doubling, the higher SSA emission sensitivity causes a negative radiative feedback (-0.125 W m−2 K−1), which can only be partly explained by changes in the radiative effect of SSA (-0.08 W m−2 K−1). Stronger radiative feedbacks are dominated by more negative low-level cloud feedbacks in the Northern Hemisphere, which are partly offset by more positive feedbacks in the Southern Hemisphere associated with a weaker Atlantic Meridional Overturning Circulation. Published 2020. This article is a U.S. Government work and is in the public domain in the USA.
英文关键词	Aerosols; Temperature distribution; Atlantic meridional overturning circulations; Climate sensitivity; Coupled climate model; Laboratory and field studies; Northern Hemispheres; Southern Hemisphere; Temperature dependence; Temperature response; Climate models; aerosol; air temperature; air-sea interaction; climate effect; climate feedback; climate modeling; field method; laboratory method; Northern Hemisphere; optical depth; radiative forcing; salt; Southern Hemisphere
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170773
作者单位	Geophysical Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Paulot F.,Paynter D.,Winton M.,et al. Revisiting the Impact of Sea Salt on Climate Sensitivity[J],2020,47(3).
APA	Paulot F.,Paynter D.,Winton M.,Ginoux P.,Zhao M.,&Horowitz L.W..(2020).Revisiting the Impact of Sea Salt on Climate Sensitivity.Geophysical Research Letters,47(3).
MLA	Paulot F.,et al."Revisiting the Impact of Sea Salt on Climate Sensitivity".Geophysical Research Letters 47.3(2020).