气候变化领域集成服务门户(CCPortal): The Sensitivity of the Jet Stream Response to Climate Change to Radiative Assumptions

CCPortal

DOI	10.1029/2018MS001492
	The Sensitivity of the Jet Stream Response to Climate Change to Radiative Assumptions
	Tan Z.; Lachmy O.; Shaw T.A.
发表日期	2019
ISSN	19422466
起始页码	934
结束页码	956
卷号	11 期号:4
英文摘要	Comprehensive climate models exhibit a large spread in the magnitude of projected poleward eddy-driven jet shift in response to warming. The spread has been connected to the radiative response to warming. To understand how different radiative assumptions alone affect the jet shift in response to warming, we introduce a new clear-sky longwave radiation hierarchy that spans idealized (gray versus four bands; without or with interactive water vapor) through comprehensive (correlated-k) radiation in the same general circulation model. The new hierarchy is used in an aquaplanet configuration to explore the impact of radiation on the jet stream response to warming, independent of mean surface temperature and meridional surface temperature gradient responses. The gray radiation scheme produces a split jet and its eddy-driven jet shifts equatorward as climate warms, whereas the storm track shifts equatorward then poleward. Including four longwave bands leads to a merged jet that shifts slightly poleward with warming, and the storm track shifts monotonically poleward. Including interactive water vapor makes the poleward jet shift comparable to the jet shift with comprehensive radiation and interactive water vapor. These jet and storm track differences are linked to the radiation response of the stratospheric temperature, the tropopause height, and the meridional gradient of the radiative forcing to warming. Dynamically, the equatorward jet shift with the gray scheme is consistent with reduced wave reflection on the poleward flank of the jet, whereas the poleward jet shift with the other schemes is consistent with increased eddy length scale that favors equatorward wave propagation. © 2019. The Authors.
语种	英语
scopus关键词	Atmospheric radiation; Atmospheric temperature; Climate change; Radiation; Storms; Surface properties; Water vapor; Wave propagation; General circulation model; Long-wave radiation; Meridional gradients; Radiation response; Radiative forcings; Stratospheric temperature; Surface temperature gradient; Surface temperatures; Climate models; climate change; climate modeling; general circulation model; longwave radiation; radiative forcing; storm track; stratosphere; temperature gradient
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/156929
作者单位	Department of the Geophysical Sciences, University of Chicago, Chicago, IL, United States; Department of Natural Sciences, Open University of Israel, Ra'anana, Israel
推荐引用方式 GB/T 7714	Tan Z.,Lachmy O.,Shaw T.A.. The Sensitivity of the Jet Stream Response to Climate Change to Radiative Assumptions[J],2019,11(4).
APA	Tan Z.,Lachmy O.,&Shaw T.A..(2019).The Sensitivity of the Jet Stream Response to Climate Change to Radiative Assumptions.Journal of Advances in Modeling Earth Systems,11(4).
MLA	Tan Z.,et al."The Sensitivity of the Jet Stream Response to Climate Change to Radiative Assumptions".Journal of Advances in Modeling Earth Systems 11.4(2019).