气候变化领域集成服务门户(CCPortal): Is the Relationship Between Stratospheric Arctic Vortex and Arctic Oscillation Steady?

CCPortal

DOI	10.1029/2021JD035759
	Is the Relationship Between Stratospheric Arctic Vortex and Arctic Oscillation Steady?
	Hu D.; Guan Z.; Liu M.; Wang T.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	The connections between the stratosphere and troposphere, for example, the stratospheric Arctic vortex (SAV) and Arctic Oscillation (AO), have been paid attention by scientists and the public in recent years. Previous studies suggested that the coupling between the stratosphere and troposphere is the strongest in winter. However, whether the link between SAV and AO during boreal winter on interannual timescales is steady is still unknown. Our results show that the interannual relationship between the SAV in early winter and AO in late winter during 1958–2018 is unsteady and has experienced a remarkable interdecadal change around the 2000s, with large and statistically significant positive correlations before the 2000s but small and insignificant correlations after the 2000s. The weakened linkage between the SAV and AO after the 2000s is possibly caused by (a) the weakened downward effect of SAV on the North Atlantic and polar sectors of AO, and (b) the opposite signs of sea level pressure (SLP) in the North Pacific and North Atlantic. The links of SAV-AO are enforced (weakened) when AO-related SLP anomalies over the North Pacific are the same (opposite) signs of those over the North Atlantic before (after) the 2000s. Differences in the tropospheric state over the North Pacific during two periods might be jointly contributed by the SAV and the SAV-related significant (insignificant) sea surface temperature anomalies over central North Pacific in the earlier (latter) period. Our results may provide evidences to improve the predictability in seasonal or interannual timescales forecasts of weather and climate at mid-latitudes. © 2021. American Geophysical Union. All Rights Reserved.
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236971
作者单位	Key Laboratory of Meteorological Disasters of China Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing, China; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China
推荐引用方式 GB/T 7714	Hu D.,Guan Z.,Liu M.,et al. Is the Relationship Between Stratospheric Arctic Vortex and Arctic Oscillation Steady?[J],2021,126(19).
APA	Hu D.,Guan Z.,Liu M.,&Wang T..(2021).Is the Relationship Between Stratospheric Arctic Vortex and Arctic Oscillation Steady?.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Hu D.,et al."Is the Relationship Between Stratospheric Arctic Vortex and Arctic Oscillation Steady?".Journal of Geophysical Research: Atmospheres 126.19(2021).