气候变化领域集成服务门户(CCPortal): Strong Dependence of Atmospheric Feedbacks on Mixed-Phase Microphysics and Aerosol-Cloud Interactions in HadGEM3

CCPortal

DOI	10.1029/2019MS001688
	Strong Dependence of Atmospheric Feedbacks on Mixed-Phase Microphysics and Aerosol-Cloud Interactions in HadGEM3
	Bodas-Salcedo A.; Mulcahy J.P.; Andrews T.; Williams K.D.; Ringer M.A.; Field P.R.; Elsaesser G.S.
发表日期	2019
ISSN	19422466
起始页码	1735
结束页码	1758
卷号	11 期号:6
英文摘要	We analyze the atmospheric processes that explain the large changes in radiative feedbacks between the two latest climate configurations of the Hadley Centre Global Environmental model. We use a large set of atmosphere-only climate change simulations (amip and amip-p4K) to separate the contributions to the differences in feedback parameter from all the atmospheric model developments between the two latest model configurations. We show that the differences are mostly driven by changes in the shortwave cloud radiative feedback in the midlatitudes, mainly over the Southern Ocean. Two new schemes explain most of the differences: the introduction of a new aerosol scheme and the development of a new mixed-phase cloud scheme. Both schemes reduce the strength of the preexisting shortwave negative cloud feedback in the midlatitudes. The new aerosol scheme dampens a strong aerosol-cloud interaction, and it also suppresses a negative clear-sky shortwave feedback. The mixed-phase scheme increases the amount of cloud liquid water path (LWP) in the present day and reduces the increase in LWP with warming. Both changes contribute to reducing the negative radiative feedback of the increase of LWP in the warmer climate. The mixed-phase scheme also enhances a strong, preexisting, positive cloud fraction feedback. We assess the realism of the changes by comparing present-day simulations against observations and discuss avenues that could help constrain the relevant processes. ©2019 Crown copyright. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland.
英文关键词	cloud feedbacks; HadGEM3
语种	英语
scopus关键词	Aerosols; Climate models; Aerosol-cloud interaction; Atmospheric feedbacks; Climate change simulations; Cloud feedbacks; Cloud liquid water path; Feedback parameters; HadGEM3; Mixed phase microphysics; Climate change; climate change; climate feedback; climate modeling; cloud cover; cloud microphysics; cloud radiative forcing; Hadley cell; volcanic cloud; warming; Southern Ocean
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156898
作者单位	Met Office Hadley Centre, Exeter, United Kingdom; Goddard Institute for Space Studies, Columbia University/NASA, New York, NY, United States
推荐引用方式 GB/T 7714	Bodas-Salcedo A.,Mulcahy J.P.,Andrews T.,et al. Strong Dependence of Atmospheric Feedbacks on Mixed-Phase Microphysics and Aerosol-Cloud Interactions in HadGEM3[J],2019,11(6).
APA	Bodas-Salcedo A..,Mulcahy J.P..,Andrews T..,Williams K.D..,Ringer M.A..,...&Elsaesser G.S..(2019).Strong Dependence of Atmospheric Feedbacks on Mixed-Phase Microphysics and Aerosol-Cloud Interactions in HadGEM3.Journal of Advances in Modeling Earth Systems,11(6).
MLA	Bodas-Salcedo A.,et al."Strong Dependence of Atmospheric Feedbacks on Mixed-Phase Microphysics and Aerosol-Cloud Interactions in HadGEM3".Journal of Advances in Modeling Earth Systems 11.6(2019).