The Effect of QBO Phase on the Atmospheric Response to Projected Arctic Sea Ice Loss in Early Winter
The Effect of QBO Phase on the Atmospheric Response to Projected Arctic Sea Ice Loss in Early Winter
复制标题
QBO 相位对预计初冬北极海冰流失的大气响应的影响
DOI：
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发表时间：
2019
影响因子：
5.2
通讯作者：
G. Magnusdottir
中科院分区：
文献类型：
--
作者：
Z. Labe;Y. Peings;G. Magnusdottir
最近的模拟研究表明，平流层-对流层耦合在大气对北冰洋海冰消失的大尺度响应中起着重要作用。越来越多的证据表明，准两年一次的振荡(QBO)可以促进或甚至减轻地面强迫的遥相关。本文利用大气环流模式研究了QBO位相对大气对北极海冰预计损失的响应的影响，该模式包含一个分辨率良好的平流层和一个由观测得到的QBO。QBO的作用是由东风相季节(QBO-E)和西风相季节(QBO-W)的组合决定的。作为对初冬海冰强迫的响应，QBO-E期间的极涡减弱，平流层-对流层波-1耦合强烈，北环模型响应为负。在表面上，这导致了更严重的西伯利亚寒流。对于QBO-W，极涡随着海冰的强迫而增强。
Recent modeling studies have shown an important role for stratosphere‐troposphere coupling in the large‐scale atmospheric response to Arctic sea ice loss. Evidence is growing that the Quasi‐biennial Oscillation (QBO) can contribute to or even mitigate teleconnections from surface forcing. Here, the influence of QBO phase on the atmospheric response to projected Arctic sea ice loss is examined using an atmospheric general circulation model with a well‐resolved stratosphere and a QBO prescribed from observations. The role of the QBO is determined by compositing seasons with easterly phase (QBO‐E) separately from seasons with westerly phase (QBO‐W). In response to the sea ice forcing in early winter, the polar vortex during QBO‐E weakens with strong stratosphere‐troposphere wave‐1 coupling and a negative Northern Annular Mode‐type response. At the surface, this results in more severe Siberian cold spells. For QBO‐W, the polar vortex strengthens in response to the sea ice forcing.
极性放大模型比对项目 (PAMIP) 对 CMIP6 的贡献：调查极性放大的原因和后果
DOI：
10.5194/gmd-2018-82
发表时间：
2018
期刊：
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影响因子：
--
作者：
Smith D
通讯作者：
Smith D
影响因子：
30.7
作者：
Overland, James E.;Dethloff, Klaus;Vihma, Timo
通讯作者：
Vihma, Timo