气候变化领域集成服务门户(CCPortal): Interseasonal connections between the timing of the stratospheric final warming and arctic sea ice

CCPortal

DOI	10.1175/JCLI-D-19-0064.1
	Interseasonal connections between the timing of the stratospheric final warming and arctic sea ice
	Kelleher M.E.; Ayarzagüena B.; Screen J.A.
发表日期	2020
ISSN	0894-8755
起始页码	3079
结束页码	3092
卷号	33 期号:8
英文摘要	Connections across seasons in atmospheric circulation and sea ice have long been sought to advance seasonal prediction. This study presents a link between the springtime stratosphere and Arctic sea ice in summer through autumn. The polar stratospheric vortex dominates the winter stratosphere before breaking down each spring, which is called the stratospheric final warming, as solar radiation returns to the pole. Interannual variability of this breakdown is dynamically driven, leading to different springtime tropospheric and surface circulation patterns. To examine the different impacts of delayed and early final warmings, a multimodel composite was generated from selected CMIP5 models. Additionally, regressions were performed on JRA-55 against an index of springtime polar vortex strength. In both the multimodel composites and reanalysis regressions, significant anomalies in sea ice thickness persist several months following an anomalous timing of the final warming. A later final warming or stronger springtime polar stratospheric vortex leads to negative sea ice thickness anomalies in the East Siberian Sea and positive anomalies in the Beaufort Sea in comparison with an earlier final warming or weaker polar vortex. The spring polar stratospheric vortex is related to spring polar surface circulation patterns. The winds associated with this pattern induce anomalous sea ice motion, moving ice from the East Siberian Sea toward the Beaufort Sea. Reduced sea ice in the East Siberian Sea is linked to anomalous warmth over this region in autumn. Our results suggest that the timing of the stratospheric final warming exerts an influence on the tropospheric circulation and sea ice through autumn, which has implications for seasonal climate prediction. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Climatology; Timing circuits; Troposphere; Vortex flow; Atmospheric circulation; Interannual variability; Polar stratospheric vortex; Polar vortex strength; Seasonal climate prediction; Seasonal prediction; Surface circulation; Tropospheric circulation; Sea ice; arctic environment; atmospheric circulation; climate modeling; climate prediction; CMIP; polar vortex; sea ice; seasonality; stratosphere; warming; Arctic Ocean; Beaufort Sea; East Siberian Sea
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171356
作者单位	University of Exeter, Exeter, United Kingdom; Universidad Complutense de Madrid, Instituto de Geociencias, Centro Mixto CSIC-UCM, Madrid, Spain; Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, United States
推荐引用方式 GB/T 7714	Kelleher M.E.,Ayarzagüena B.,Screen J.A.. Interseasonal connections between the timing of the stratospheric final warming and arctic sea ice[J],2020,33(8).
APA	Kelleher M.E.,Ayarzagüena B.,&Screen J.A..(2020).Interseasonal connections between the timing of the stratospheric final warming and arctic sea ice.Journal of Climate,33(8).
MLA	Kelleher M.E.,et al."Interseasonal connections between the timing of the stratospheric final warming and arctic sea ice".Journal of Climate 33.8(2020).