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Major cause of unprecedented Arctic warming inJanuary 2016: Critical role of an Atlantic windstorm

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Title
Major cause of unprecedented Arctic warming inJanuary 2016: Critical role of an Atlantic windstorm
Other Titles
2016년 1월의 이례적인 북극 온난화의 주요 원인: 대서양 스톰의 중요한 역할
Authors
Hong, Ja-Young
Kim, Hyun Kyoung
Kim, Sang-Woo
Kim, Joo-Hong
Kim, Seong-Joong
Kwon, Hataek
Xiangdong Zhang
Jun, Sang-Yoon
Kim, Baek-Min
Keywords
대서양 스톰; 북극 온난화; 북극해빙; 블로킹
Issue Date
2016
Citation
Hong, Ja-Young, et al. 2016. Major cause of unprecedented Arctic warming inJanuary 2016: Critical role of an Atlantic windstorm. 2016 American Geophysical Union Fall Meeting. Moscone Center. 2016.12.12~2016.12.16.
Abstract
Vertical structure of Arctic warming during winter is essentially bottom-heavy. A number of studies have suggested that this is largely due to the enhanced upward turbulent heat fluxes under sea ice loss. Recently, an alternative physical mechanism has been proposed that the synoptically driven moisture intrusion from the lower latitudes is responsible for the bottom-heavy warming profile. In January 2016, the Arctic experienced an unprecedented jump of air temperature. During this event, strong warm and moist air intrusion were observed, as well as the loss of sea ice in the Barents and Kara Seas, providing an invaluable opportunity to examine the relative importance of individual factors for the extreme Arctic warming. Observational analyses reveal that this extreme warming was mainly caused by the entry of a strong Atlantic windstorm into the Arctic, which brought about the enormous intrusion of moist and warm air masses into the Arctic. Numerical experiments show that the warming effect of sea ice loss and associated upward turbulent heat fluxes is relatively minor in this event. This suggests the importance of the synoptically driven warm and moist air intrusion into the Arctic as an essential mechanism for extreme Arctic warming.
URI
http://repository.kopri.re.kr/handle/201206/8317
Conference Name
2016 American Geophysical Union Fall Meeting
Conference Place
Moscone Center
Conference Date
2016.12.12~2016.12.16
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