論文

査読有り
2019年1月

Weak Stratospheric Polar Vortex Events Modulated by the Arctic Sea-Ice Loss

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
  • Kazuhira Hoshi
  • ,
  • Jinro Ukita
  • ,
  • Meiji Honda
  • ,
  • Tetsu Nakamura
  • ,
  • Koji Yamazaki
  • ,
  • Yasunobu Miyoshi
  • ,
  • Ralf Jaiser

124
2
開始ページ
858
終了ページ
869
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1029/2018JD029222
出版者・発行元
AMER GEOPHYSICAL UNION

We characterize the differences in the upward planetary-scale wave propagation during observed weak polar vortex (WPV) events between heavy- and light-sea-ice years in the Barents-Kara Sea based on a composite analysis for the period of 1979-2015. Upward wave propagation during WPV events in heavy-ice years is dominated by the wavenumber 1 component. In contrast, WPV events occurring in light-ice years are characterized by stronger wavenumber 2 propagation, which is caused by the tropospheric wavenumber 2 response to sea-ice reduction in the Barents-Kara Sea. The above observed features are supported by an Atmospheric General Circulation Model experiment. Thus, under present climate conditions, Arctic sea-ice loss is a possible factor modulating the wave propagation during the WPV events. We also find that the WPV events in light-ice years have stronger stratosphere-troposphere coupling, followed by colder midlatitude surface conditions particularly over Eurasia.

Web of Science ® 被引用回数 : 7

リンク情報
DOI
https://doi.org/10.1029/2018JD029222
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000458845300024&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-85060760349&partnerID=MN8TOARS
URL
http://orcid.org/0000-0002-8402-694X

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