气候变化领域集成服务门户(CCPortal): Summertime atmosphere–sea ice coupling in the Arctic simulated by CMIP5/6 models: Importance of large-scale circulation

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DOI	10.1007/s00382-020-05543-5
	Summertime atmosphere–sea ice coupling in the Arctic simulated by CMIP5/6 models: Importance of large-scale circulation
	Luo R.; Ding Q.; Wu Z.; Baxter I.; Bushuk M.; Huang Y.; Dong X.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-05-06
英文摘要	Summertime barotropic high pressure in the Arctic and its induced warmer and wetter atmosphere over sea ice are suggested to be important contributors to September sea ice loss on interannual and interdecadal time scales in the past decades. Using ERA5 and other reanalysis data, we find that atmospheric warming and moistening in the Arctic, synchronized by high latitude atmospheric circulation variability, work in tandem to melt sea ice through increasing downwelling longwave radiation at the surface. To what extent this atmosphere-longwave radiation-sea ice relationship can be captured in CMIP5 and 6 remains unknown and thus addressing this question is the objective of this study. To achieve this goal, we construct a process-oriented metric emphasizing the statistical relationship between atmospheric temperature and humidity with sea ice, which can effectively rank and differentiate the performance of 30 CMIP5 climate models in reproducing the observed connection. Based on our evaluation, we suggest that most available models in CMIP5 and 6 have a limitation in reproducing the full strength of the observed atmosphere–sea ice connection. This limitation likely stems from a weak impact of downwelling longwave radiation in linking sea ice with circulation associated with the weak sensitivity of the temperature and humidity fields to circulation variability in the Arctic. Thus, further efforts should be devoted to understanding the sources of these models’ limitations and improve skill in simulating the effects of atmospheric circulation in coupling temperature, humidity, surface radiation and sea ice together during Arctic summer. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature.
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183361
作者单位	Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; Department of Geography, and Earth Research Institute, University of California, Santa Barbara, CA 93106, United States; Geophysical Fluid Dynamics Laboratory, Princeton, NJ 08540, United States; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	Luo R.,Ding Q.,Wu Z.,等. Summertime atmosphere–sea ice coupling in the Arctic simulated by CMIP5/6 models: Importance of large-scale circulation[J],2021,56(2021-05-06).
APA	Luo R..,Ding Q..,Wu Z..,Baxter I..,Bushuk M..,...&Dong X..(2021).Summertime atmosphere–sea ice coupling in the Arctic simulated by CMIP5/6 models: Importance of large-scale circulation.Climate Dynamics,56(2021-05-06).
MLA	Luo R.,et al."Summertime atmosphere–sea ice coupling in the Arctic simulated by CMIP5/6 models: Importance of large-scale circulation".Climate Dynamics 56.2021-05-06(2021).