Interannual and Interdecadal Variations of the Hadley Circulation and Its Connection with Tropical Sea Surface Temperature
Interannual and Interdecadal Variations of the Hadley Circulation and Its Connection with Tropical Sea Surface Temperature
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DOI：
10.1002/cjg2.939
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发表时间：
2006-09
期刊：
影响因子：
--
通讯作者：
Bo‐Tao Zhou;Huijun Wang
中科院分区：
文献类型：
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作者：
Bo‐Tao Zhou;Huijun Wang
利用NCEP/NCAR风场资料和NOAA海表温度（SST）资料，研究了冬季北方半球Hadley环流（NHHC）和夏季南半球Hadley环流（SHHC）的年际和年代际变化及其与热带海表温度（SST）的关系。结果表明，冬季NHHC不仅具有显著的年际和年代际变化，而且还具有正的变化趋势。伴随着冬季NHHC的加强，其中心位置南移，高度升高。夏季风分量的年代际变化具有强-弱-强的格局，但没有明显的变化趋势。冬季NHHC与Nino 3区海温之间存在正相关关系，且这种正相关关系存在年代际变化。在年际尺度上，Nino 3区SST与冬季NHHC呈正相关，与夏季SHHC呈负相关，即当中东太平洋SST变暖（变冷）时，冬、夏季Hadley环流都变强（变弱）。
The variations of the Northern Hemispheric Hadley circulation (NHHC) in winter and the Southern Hemispheric Hadley circulation (SHHC) in summer and their connections with tropical sea surface temperature (SST) on interannual and interdecadal scales are investigated by use of NCEP/NCAR wind data and NOAA SST data. The results indicate that the winter NHHC not only exhibits remarkably interannual and interdecadal variability, but also shows a positive trend. Accompanying the strengthened winter NHHC, its center shifts southward and its height ascends. The summer SHHC, lacking an obvious trend, exhibits decadal variations with a strong, weak and strong pattern. The results also show that a positive correlation between the NHHC and Nino3 region SST in winter exists, and this correlation changes on an interdecadal scale. It is also revealed that the Nino3 region SST is positively correlated with the NHHC in winter and negatively correlated with the SHHC in summer on an interannual scale, which means when the SST in the mid-east Pacific becomes warmer (colder), both winter and summer Hadley circulations get stronger (weaker).