globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85044438150
论文题名:
Recent intensified impact of December Arctic Oscillation on subsequent January temperature in Eurasia and North Africa
作者: He S.; Wang H.; Gao Y.; Li F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期:2019-01-02
起始页码: 1077
结束页码: 1094
语种: 英语
英文关键词: Arctic Oscillation ; Interdecadal change ; Planetary waves ; Storm track
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.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122449
Appears in Collections:气候变化事实与影响

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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

Recommended Citation:
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]. Climate Dynamics,2019-01-01,52(2019-01-02)
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