Analysis of the warmest Arctic winter, 2015-2016

被引:72
作者
Cullather, Richard I. [1 ,2 ]
Lim, Young-Kwon [2 ,3 ]
Boisvert, Linette N. [1 ,4 ]
Brucker, Ludovic [4 ,5 ]
Lee, Jae N. [6 ,7 ]
Nowicki, Sophie M. J. [4 ]
机构
[1] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
[2] NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA
[3] Goddard Earth Sci Technol & Res, IM Syst Grp, College Pk, MD USA
[4] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Greenbelt, MD USA
[5] Univ Space Res Assoc, Goddard Earth Sci Technol & Res, Columbia, MD USA
[6] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA
[7] NASA, Goddard Space Flight Ctr, Climate & Radiat Lab, Greenbelt, MD USA
关键词
polar amplification; winter; 2015-2016; Arctic warming; SEA-ICE; ATMOSPHERIC RESPONSE; NORTH-ATLANTIC; CLIMATE-CHANGE; AMPLIFICATION; TELECONNECTIONS; ANOMALIES; MODEL; ENSO; FLUX;
D O I
10.1002/2016GL071228
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
December through February 2015-2016 defines the warmest winter season over the Arctic in the observational record. Positive 2m temperature anomalies were focused over regions of reduced sea ice cover in the Kara and Barents Seas and southwestern Alaska. A third region is found over the ice-covered central Arctic Ocean. The period is marked by a strong synoptic pattern which produced melting temperatures in close proximity to the North Pole in late December and anomalous high pressure near the Taymyr Peninsula. Atmospheric teleconnections from the Atlantic contributed to warming over Eurasian high-latitude land surfaces, and El Nino-related teleconnections explain warming over southwestern Alaska and British Columbia, while warm anomalies over the central Arctic are associated with physical processes including the presence of enhanced atmospheric water vapor and an increased downwelling longwave radiative flux. Preconditioning of sea ice conditions by warm temperatures affected the ensuing spring extent.
引用
收藏
页码:10808 / 10816
页数:9
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