气候变化领域集成服务门户(CCPortal): Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales

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DOI	10.5194/acp-22-4867-2022
	Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales
	Dimdore-Miles, Oscar; Gray, Lesley; Osprey, Scott; Robson, Jon; Sutton, Rowan; Sinha, Bablu
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4867
结束页码	4893
卷号	22 期号:7 页码:27
英文摘要	Variations in the strength of the Northern Hemisphere winter polar stratospheric vortex can influence surface variability in the Atlantic sector. Disruptions of the vortex, known as sudden stratospheric warmings (SSWs), are associated with an equatorward shift and deceleration of the North Atlantic jet stream, negative phases of the North Atlantic Oscillation, and cold snaps over Eurasia and North America. Despite clear influences at the surface on sub-seasonal timescales, how stratospheric vortex variability interacts with ocean circulation on decadal to multi-decadal timescales is less well understood. In this study, we use a 1000 year preindustrial control simulation of the UK Earth System Model to study such interactions, using a wavelet analysis technique to examine non-stationary periodic signals in the vortex and ocean. We find that intervals which exhibit persistent anomalous vortex behaviour lead to oscillatory responses in the Atlantic Meridional Overturning Circulation (AMOC). The origin of these responses appears to be highly non-stationary, with spectral power in vortex variability at periods of 30 and 50 years. In contrast, AMOC variations on longer timescales (near 90-year periods) are found to lead to a vortex response through a pathway involving the equatorial Pacific and quasi-biennial oscillation. Using the relationship between persistent vortex behaviour and the AMOC response established in the model, we use regression analysis to estimate the potential contribution of the 8-year SSW hiatus interval in the 1990s to the recent negative trend in AMOC observations. The result suggests that approximately 30 % of the trend may have been caused by the SSW hiatus.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000782155100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273715
作者单位	University of Oxford; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC National Centre for Atmospheric Science; University of Leeds; University of Reading; NERC National Oceanography Centre; University of Southampton
推荐引用方式 GB/T 7714	Dimdore-Miles, Oscar,Gray, Lesley,Osprey, Scott,et al. Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales[J],2022,22(7):27.
APA	Dimdore-Miles, Oscar,Gray, Lesley,Osprey, Scott,Robson, Jon,Sutton, Rowan,&Sinha, Bablu.(2022).Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(7),27.
MLA	Dimdore-Miles, Oscar,et al."Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.7(2022):27.