气候变化领域集成服务门户(CCPortal): Assessing CESM2 Clouds and Their Response to Climate Change Using Cloud Regimes

CCPortal

DOI	10.1175/JCLI-D-23-0337.1
	Assessing CESM2 Clouds and Their Response to Climate Change Using Cloud Regimes
	Davis, Isaac; Medeiros, Brian
发表日期	2024
ISSN	0894-8755
EISSN	1520-0442
起始页码	37
结束页码	10
卷号	37 期号:10
英文摘要	The Community Earth System Model, version 2 (CESM2), has a very high climate sensitivity driven by strong positive cloud feedbacks. To evaluate the simulated clouds in the present climate and characterize their response with climate warming, a clustering approach is applied to three independent satellite cloud products and a set of coupled climate simulations. Using k -means clustering with a Wasserstein distance cost function, a set of typical cloud con fi gura- tions is derived for the satellite cloud products. Using satellite simulator output, the model clouds are classi fi ed into the observed cloud regimes in both current and future climates. The model qualitatively reproduces the observed cloud con fi gurations in the historical simulation using the same time period as the satellite observations, but it struggles to capture the observed heterogeneity of clouds which leads to an overestimation of the frequency of a few preferred cloud regimes. This problem is especially apparent for boundary layer clouds. Those low-level cloud regimes also account for much of the climate response in the late twenty- fi rst century in four shared socioeconomic pathway simulations. The model reduces the frequency of occurrence of these low -cloud regimes, especially in tropical regions under large-scale subsidence, in favor of regimes that have weaker cloud radiative effects.
英文关键词	Cloud forcing; Cloud retrieval; Clustering Clouds; Cloud radiative effects; Climate models
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001223152500001
来源期刊	JOURNAL OF CLIMATE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295032
作者单位	University of Colorado System; University of Colorado Boulder; National Center Atmospheric Research (NCAR) - USA
推荐引用方式 GB/T 7714	Davis, Isaac,Medeiros, Brian. Assessing CESM2 Clouds and Their Response to Climate Change Using Cloud Regimes[J],2024,37(10).
APA	Davis, Isaac,&Medeiros, Brian.(2024).Assessing CESM2 Clouds and Their Response to Climate Change Using Cloud Regimes.JOURNAL OF CLIMATE,37(10).
MLA	Davis, Isaac,et al."Assessing CESM2 Clouds and Their Response to Climate Change Using Cloud Regimes".JOURNAL OF CLIMATE 37.10(2024).