气候变化领域集成服务门户(CCPortal): Role of the mean state for the Southern Hemispheric jet stream response to CO2 forcing in CMIP6 models

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DOI	10.1088/1748-9326/ab8331
	Role of the mean state for the Southern Hemispheric jet stream response to CO2 forcing in CMIP6 models
	Curtis P.E.; Ceppi P.; Zappa G.
发表日期	2020
ISSN	17489318
卷号	15 期号:6
英文摘要	Global climate models indicate that the Southern Hemispheric (SH) jet stream shifts poleward in response to CO2 forcing, but the magnitude of this shift remains highly uncertain. Here we analyse the SH jet stream response to 4×CO2 forcing in Coupled Model Intercomparison Project phase 6 (CMIP6) simulations, and find a substantially muted jet shift during winter compared with CMIP5. We suggest this muted response results from a more poleward mean jet position, consistent with a strongly reduced bias in jet position relative to the reanalysis during 1980-2004. The improved mean jet position cannot be explained by changes in the simulated sea surface temperatures. Instead, we find indications that increased horizontal grid resolution in CMIP6 relative to CMIP5 has contributed to the higher mean jet latitude, and thus to the reduced jet shift under CO2 forcing. These results imply that CMIP6 models can provide more realistic projections of SH climate change. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	atmospheric circulation; climate change; climate models; jet streams
语种	英语
scopus关键词	Carbon dioxide; Climate change; Oceanography; Surface waters; Coupled Model Intercomparison Project; Global climate model; Horizontal grid; Jet streams; Reanalysis; Sea surface temperature (SST); Climate models; carbon dioxide; climate change; climate forcing; climate prediction; CMIP; global climate; jet stream; sampling bias; sea surface temperature; Southern Hemisphere
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153998
作者单位	Department of Physics, Imperial College London, London, United Kingdom; Grantham Institute for Climate Change and the Environment, Imperial College London, London, United Kingdom; Istituto di Scienze dell'Atmosfera e Del Clima (ISAC), Consiglio Nazionale Delle Ricerche (CNR), Bologna, Italy
推荐引用方式 GB/T 7714	Curtis P.E.,Ceppi P.,Zappa G.. Role of the mean state for the Southern Hemispheric jet stream response to CO2 forcing in CMIP6 models[J],2020,15(6).
APA	Curtis P.E.,Ceppi P.,&Zappa G..(2020).Role of the mean state for the Southern Hemispheric jet stream response to CO2 forcing in CMIP6 models.Environmental Research Letters,15(6).
MLA	Curtis P.E.,et al."Role of the mean state for the Southern Hemispheric jet stream response to CO2 forcing in CMIP6 models".Environmental Research Letters 15.6(2020).