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A critical role of extreme Atlantic windstorms in Arctic warming

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Title
A critical role of extreme Atlantic windstorms in Arctic warming
Other Titles
북극 온난화에서 강한 대서양 폭풍의 중요한 역할
Authors
Hong, Ja-Young
Kim, Baek-Min
Baek, Eun-Hyuk
Kim, Joo-Hong
Zhang, Xiangdong
Kim, Seong-Joong
Lee, Solji
Issue Date
2019
Citation
Hong, Ja-Young, et al. 2019. A critical role of extreme Atlantic windstorms in Arctic warming. The 2nd Korea Geoscience Union annual academic conference. Pyeongchang. 2019.07.03~2019.07.05.
Abstract
Here we show that Atlantic windstorms of extreme category in northern winter tend to follow a well-defined route toward the Atlantic sector of Arctic, and that heat and moisture transported by these extreme storms significantly warm the Arctic. A positive North Atlantic Oscillation condition and the associated intensified upper-level Atlantic jet provide favorable conditions for those extreme storm developments through enhanced vertical wind shear. These extreme windstorms lead to two discernible impacts on the Arctic: 1) enhanced poleward energy transport by moisture intrusion to the Arctic, which accompanies increased longwave downward radiation and 2) the occurrence of blocking-like patterns after the storm break-up. During these periods, significant Arctic warming was observed of a 10-fold increase versus normal and weak storms. The poleward deflections of extreme storms, and the Arctic warming driven by such storms, are well simulated in numerical experiments with oceanatmosphere coupled models.
URI
https://repository.kopri.re.kr/handle/201206/12248
Conference Name
The 2nd Korea Geoscience Union annual academic conference
Conference Place
Pyeongchang
Conference Date
2019.07.03~2019.07.05
Appears in Collections  
2019-2019, Development and Application of the Korea Polar Prediction System (KPOPS) for Climate Change and Disasterous Weather Events (19-19) / Kim, Joo-Hong (PE19130)
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