Interannual variability in the stratospheric‐tropospheric circulation in a Coupled Ocean‐Atmosphere GCM
Interannual variability in the stratospheric‐tropospheric circulation in a Coupled Ocean‐Atmosphere GCM
复制标题
海洋-大气耦合 GCM 中平流层-对流层环流的年际变化
DOI：
10.1029/96gl00158
复制
发表时间：
1996
影响因子：
5.2
通讯作者：
A. Noda
中科院分区：
文献类型：
--
作者：
A. Kitoh;H. Koide;K. Kodera;S. Yukimoto;A. Noda
用全球海气耦合环流模式模拟了冬季北方平流层和对流层环流与海表温度的关系。通过经验正交函数分析，提取了纬向风的两种年际变化模态。第一模态与平流层极涡的年际变化有关。该模态通过对流层环流变化与北太平洋海温有显著的相关性。第二个模态是对流层副热带急流的变化，与模拟的厄尔尼诺有关。模式结果暗示厄尔尼诺现象与极地涡旋之间没有很强的关系。
Relationships between the northern winter stratospheric and tropospheric circulations and the sea surface temperature (SST) simulated by a global coupled ocean-atmosphere general circulation model are investigated. Two modes are extracted for interannual variability of the zonal-mean zonal wind by an empirical orthogonal function analysis. The first mode is related with interannual variations of the stratospheric polar vortex. This mode has a significant correlation with the North Pacific SST through tropospheric circulation changes. The second mode is the variation of the tropospheric subtropical jet and is related with the simulated El Nino. Model results imply no strong relationship between El Nino and the polar vortex.