Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China
Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China
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热带印度洋上层海洋热量与我国夏季降水的关系
DOI：
10.1080/16742834.2012.11447010
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发表时间：
2012-01
影响因子：
2.3
通讯作者：
Wang Dong-Xiao
中科院分区：
文献类型：
--
作者：
Huang Ke;Zhang Qi-Long;Xie Qiang;Wang Dong-Xiao
对热带印度洋石井表层至700 m深度海洋热含量的分析表明，印度洋海洋热含量在年际时间尺度上变化剧烈。OHC的经验正交函数（EOF 1）的第一模态表明，印度洋存在一个强的海气相互作用型，东为正（负）负荷，西为负（正）负荷。这种跷跷板振荡型对我国夏季降水的影响呈现南北反向分布。综合分析表明，在积极的（负）OHC事件，异常气旋西太平洋和华南的（反气旋）环流减弱增强了对流层低层的季风北向气流;同时，异常纬向环流连接着（上升）分支在东南印度洋和上升在华南地区有一个降（降）分支，在华北地区有一个降（升）分支。对这些特征的机制分析表明：（1）OHC涡度的积累与中纬度地区的波动活动有关;（2）东亚和西太平洋地区出现了由印太空气-OHC相互作用引起的纬向遥相关。这两种类型都能引起我国夏季降水异常。
Abstract An analysis of the Ishii ocean heat content (OHC) in the tropical Indian Ocean from the surface to 700-m depth shows that the OHC changes dramatically on the interannual timescale in the Indian Ocean. The first mode of empirical orthogonal function (EOF1) of the OHC shows that there is a strong air-sea interaction pattern in the Indian Ocean with a positive (negative) loading in the east and a negative (positive) loading in the west. This seesaw oscillation pattern influences the summer precipitation in China with a North-South reversed distribution. Composite analysis shows that during a positive (negative) OHC episode, an anomalous cyclonic (anti-cyclonic) circulation over the western Pacific and South China weakens (enhances) the monsoonal northward flow in the lower troposphere; meanwhile, anomalous meridional circulation connects the descending (ascending) branch over the Southeast Indian Ocean and the ascending (descending) branch in South China as well as a descending (ascending) branch over North China. Analysis of the mechanism behind these features suggests that (1) the accumulation of OHC-induced vorticity is related to the wave activity over the mid-latitudes and that (2) the meridional teleconnection induced by the Indo-Pacific air-OHC interaction appears over East Asia and the western Pacific. Both of these patterns can cause summer precipitation anomalies in China.
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DOI：
10.1002/qj.49711850705
发表时间：
1992-07-01
影响因子：
8.9
作者：
WEBSTER, PJ;YANG, S
通讯作者：
YANG, S
影响因子：
4.9
作者：
Bo Wu;Tim Li;Tianjun Zhou
通讯作者：
Bo Wu;Tim Li;Tianjun Zhou
影响因子：
64.8
作者：
Saji, NH;Goswami, BN;Yamagata, T
通讯作者：
Yamagata, T
DOI：
--
发表时间：
2009
期刊：
--
影响因子：
--
作者：
P. Vinayachandran;P. A. Francis;Samrat Rao
通讯作者：
P. Vinayachandran;P. A. Francis;Samrat Rao
影响因子：
1.6
作者：
Shuangwen Sun;J. Lan;Yi Wang
通讯作者：
Shuangwen Sun;J. Lan;Yi Wang