Arctic polar vortex splitting in early January: The role of Arctic sea ice loss
Arctic polar vortex splitting in early January: The role of Arctic sea ice loss
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DOI：
10.1016/j.jastp.2019.105137
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发表时间：
2019-11
影响因子：
1.9
通讯作者：
V. Zuev;E. Savelieva
中科院分区：
文献类型：
--
作者：
V. Zuev;E. Savelieva
北极平流层极涡通常在秋季形成，在仲冬达到最大强度，并在春季衰减。冬春期间极涡的强度和持续性在冬末太阳辐射回流平流层臭氧损耗中起重要作用。极涡破裂大多是在垂直传播的行星Rossby波的影响下发生的。1984/1985、1998/1999和2012/2013年观测到行星波活动增强，并导致仲冬极涡破裂，此后一个多月没有观测到极涡。在这项研究中，北极海冰的消失被认为是最有可能的原因，导致行星波活动增加，导致北极极地涡旋异常减弱。1984年秋季、1998年秋季和2012年秋季，波弗特海、加拿大北极群岛和北极中部的北冰洋海冰面积创下历史新低。
The Arctic stratospheric polar vortex usually forms in autumn, reaches its peak intensity in mid-winter and decays in spring. The polar vortex strength and persistence in the winter–spring period play an important role in stratospheric ozone depletion with the return of solar radiation in late winter. The polar vortex breakdown in most cases occurs under the influence of vertically propagating planetary Rossby waves. The increased activity of planetary waves was observed in 1984/1985, 1998/1999 and 2012/2013 and led to the polar vortex breakdown in mid-winter, after which it was not observed for more than a month. In this study, Arctic sea ice loss is considered as the most likely cause of the increased activity of planetary waves resulting in the unusual weakening of the Arctic polar vortex. Arctic sea ice extent was a record low in autumn 1984, 1998 and 2012 in the Beaufort Sea, the Canadian Arctic Archipelago and the Central Arctic.