气候变化领域集成服务门户(CCPortal): Consistent biases in Antarctic sea ice concentration simulated by climate models

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DOI	10.5194/tc-12-365-2018
	Consistent biases in Antarctic sea ice concentration simulated by climate models
	Roach L.A.; Dean S.M.; Renwick J.A.
发表日期	2018
ISSN	19940416
卷号	12 期号:1
英文摘要	The simulation of Antarctic sea ice in global climate models often does not agree with observations. In this study, we examine the compactness of sea ice, as well as the regional distribution of sea ice concentration, in climate models from the latest Coupled Model Intercomparison Project (CMIP5) and in satellite observations. We find substantial differences in concentration values between different sets of satellite observations, particularly at high concentrations, requiring careful treatment when comparing to models. As a fraction of total sea ice extent, models simulate too much loose, low-concentration sea ice cover throughout the year, and too little compact, high-concentration cover in the summer. In spite of the differences in physics between models, these tendencies are broadly consistent across the population of 40 CMIP5 simulations, a result not previously highlighted. Separating models with and without an explicit lateral melt term, we find that inclusion of lateral melt may account for overestimation of low-concentration cover. Targeted model experiments with a coupled ocean-sea ice model show that choice of constant floe diameter in the lateral melt scheme can also impact representation of loose ice. This suggests that current sea ice thermodynamics contribute to the inadequate simulation of the low-concentration regime in many models. © Author(s) 2018.
学科领域	climate modeling; CMIP; global climate; ice cover; sea ice; simulation; thermodynamics; Southern Ocean
语种	英语
scopus关键词	climate modeling; CMIP; global climate; ice cover; sea ice; simulation; thermodynamics; Southern Ocean
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119228
作者单位	National Institute of Water and Atmospheric Research, 301 Evans Bay Parade, Greta Point, Wellington, 6021, New Zealand; School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, 6021, New Zealand
推荐引用方式 GB/T 7714	Roach L.A.,Dean S.M.,Renwick J.A.. Consistent biases in Antarctic sea ice concentration simulated by climate models[J],2018,12(1).
APA	Roach L.A.,Dean S.M.,&Renwick J.A..(2018).Consistent biases in Antarctic sea ice concentration simulated by climate models.Cryosphere,12(1).
MLA	Roach L.A.,et al."Consistent biases in Antarctic sea ice concentration simulated by climate models".Cryosphere 12.1(2018).