Tropospheric and stratospheric aspects of the Arctic oscillation
Tropospheric and stratospheric aspects of the Arctic oscillation
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DOI：
10.1029/2000gl012017
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发表时间：
2000-10
影响因子：
5.2
通讯作者：
K. Kodera;Y. Kuroda
中科院分区：
文献类型：
--
作者：
K. Kodera;Y. Kuroda
通过选取18个月间变化较大的事件，研究了平流层变化在北极涛动（AO）中的作用。结果表明，虽然对流层特征非常相似，但AO的垂直结构有很大的不同，这取决于它是由平流层纬向平均纬向风异常的向下传播（S型）还是在对流层内产生（T型）。S型事件优先发生在2月和3月，而T型事件发生在11月和12月。分析结果表明，AO相关变率的各个方面可以更容易地理解为平流层和对流层变率模式的耦合和解耦。
The role of the stratospheric variability in the Arctic Oscillation (AO) is investigated by selecting 18 large month‐to‐month variation events. It is shown that although tropospheric features are very similar, the vertical structure of the AO differs considerably depending on whether it is initiated by a downward propagation of zonal‐mean zonal wind anomalies from the stratosphere (type S) or it is produced within the troposphere (type T). Type S events preferentially occur during February and March, while type T events are seen during November and December. The results of the analysis suggest that diverse aspects of the AO‐related variability can more easily be understood as coupling and uncoupling of stratospheric and tropospheric modes of variability.