气候变化领域集成服务门户(CCPortal): Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa

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DOI	10.1007/s00382-018-4182-7
	Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa
	He S.; Wang H.; Gao Y.; Li F.
发表日期	2019
ISSN	0930-7575
起始页码	1077
结束页码	1094
卷号	52 期号:2020-01-02
英文摘要	This study reveals an intensified influence of December Arctic Oscillation (AO) on the subsequent January surface air temperature (SAT) over Eurasia and North Africa in recent decades. The connection is statistically insignificant during 1957/58–1979/80 (P1), which becomes statistically significant during 1989/90–2011/12 (P2). The possible causes are further investigated. Associated with positive December AO during P2, significant anomalous anticyclone emerges over the central North Atlantic, which is accompanied with significant westerly and easterly anomalies along 45°−65°N and 20°−40°N, respectively. This favors the significant influence of December AO on the subsequent January SAT and atmospheric circulation over Eurasia and North Africa via triggering the North Atlantic tripole sea surface temperature (SST) anomaly that persists into the subsequent January. By contrast, the December AO-related anomalous anticyclone during P1 is weak and is characterized by two separate centers located in the eastern and western North Atlantic. Correspondingly, the westerly and easterly anomalies over the North Atlantic Ocean are weak and the-related tripole SST anomaly is not well formed, unfavorable for the persistent impact of the December AO into the subsequent January. Further analyses indicate that the different anomalous anticyclone associated with the December AO over the North Atlantic may be induced by the strengthened synoptic-scale eddy feedbacks over the North Atlantic, which may be related to the interdecadal intensification of the storm track activity. Additionally, the planetary stationary wave related to the December AO propagates from surface into upper stratosphere at mid-latitudes during P2, which further propagates downward to the troposphere and causes anomalous atmospheric circulation in the subsequent January. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Arctic Oscillation; Interdecadal change; Planetary waves; Storm track
语种	英语
scopus关键词	air temperature; anticyclone; Arctic Oscillation; atmospheric circulation; decadal variation; planetary wave; sea surface temperature; storm track; synoptic meteorology; temperature anomaly; Atlantic Ocean; Atlantic Ocean (North); Eurasia; North Africa
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146606
作者单位	Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, 5007, Norway; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University for Information Science and Technology, Nanjing, 210044, China; Climate Change Research Center, Chinese Academy of Sciences, Beijing, 100029, China; Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research, Bergen, 5006, Norway; NILU-Norwegian Institute for Air Research, Kjeller, 2007, Norway
推荐引用方式 GB/T 7714	He S.,Wang H.,Gao Y.,et al. Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa[J],2019,52(2020-01-02).
APA	He S.,Wang H.,Gao Y.,&Li F..(2019).Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa.Climate Dynamics,52(2020-01-02).
MLA	He S.,et al."Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa".Climate Dynamics 52.2020-01-02(2019).