How the annual cycle affects the extratropical response to ENSO
How the annual cycle affects the extratropical response to ENSO
复制标题
年周期如何影响对 ENSO 的温带响应
DOI：
10.1029/2009jd012660
复制
发表时间：
2010
影响因子：
--
通讯作者：
B. Kirtman
中科院分区：
文献类型：
--
作者：
Daeho Jin;B. Kirtman
[1]用热带太平洋指定的海面温度(SST)和一个简单的热力平板混合层模式与大气环流模式相耦合的一个简单的热力平板混合层模式，用一组数值试验研究了热带远地强迫与温带外季节的关系。数值实验使用了一种理想化的厄尔尼诺-南方涛动(ENSO)演变，其中峰值位相(相对于年周期)可以任意移动。在这种情况下，我们将ENSO的相位移动了6个月。ENSO的合成分析表明，温带的远程响应与当地季节是锁相的，而不是ENSO。太平洋盆地纬向平均断面显示，热带大气持续响应规定的海温强迫，但连接温带外的大气桥梁出现在特定的季节。
[1] The relationship between tropical remote forcing and seasonality in the extratropics is examined with a set of numerical experiments that use prescribed sea surface temperature (SST) in the tropical Pacific and a simple thermodynamic slab mixed-layer model outside the prescribed region coupled to an atmospheric general circulation model. The numerical experiments use an idealized El Nino–Southern Oscillation (ENSO) evolution where the peak phase (with respect to the annual cycle) can be arbitrarily shifted. In this case, we shift the phase of ENSO by 6 months. An ENSO composite analysis indicates that the extratropical remote response is phase locked with the local season, not ENSO. Pacific basin zonal mean cross section shows that the tropical atmosphere continuously responds to the prescribed SST forcing, but the atmospheric bridge connecting to the extratropics occurs in specific seasons.