印度洋不同海温模态对两类厄尔尼诺事件与我国南方秋季降水关系的影响

谭晶; 王彰贵; 黄荣辉; 蔡怡

doi:10.3969/j.issn.0253-4193.2017.11.006

印度洋不同海温模态对两类厄尔尼诺事件与我国南方秋季降水关系的影响

doi: 10.3969/j.issn.0253-4193.2017.11.006

1.
中国科学院大气物理研究所季风系统研究中心, 北京 100190;中国科学院大学, 北京 100049;国家海洋环境预报中心, 北京 100081
2.
国家海洋环境预报中心, 北京 100081
3.
中国科学院大气物理研究所季风系统研究中心, 北京 100190

基金项目: 国家海洋局海洋公益性行业科研专项（201505013）；国家自然科学基金（41376020）。

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出版历程
- 收稿日期: 2016-12-07
- 修回日期: 2017-01-12

Impacts of different sea surface temperature anomaly modes in Indian Ocean on the relationship between two types of El Niño events and South China autumn rainfall

1.
Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China;National Marine Environmental Forcasting Center, Beijing 100081, China
2.
National Marine Environmental Forcasting Center, Beijing 100081, China
3.
Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190, China

摘要

摘要: 利用1951—2015年NOAA气候预测中心的SST扩展重建资料（ERSST V3b）、国家气候中心提供的我国160站月降水量资料、美国国家环境预报中心/大气研究中心（NCEP/NCAR）提供的各气压层的水平风速、垂直速度和比湿资料，研究了印度洋不同海温模态对两类厄尔尼诺事件与我国南方秋季降水关系的影响。结果表明，虽然东部型（中部型）厄尔尼诺年秋季我国长江以南地区降水偏多（少），但当东部型厄尔尼诺与印度洋正偶极子同时发生年秋季，我国长江以南地区降水偏多的程度显著提高；当中部型厄尔尼诺与印度洋正偶极子同时发生年秋季，我国西南地区降水转为偏多，其他南方地区降水仍然偏少；当中部型厄尔尼诺与印度洋一致增暖型海温同时发生年秋季，我国整个长江以南地区降水偏少，且偏少的幅度要显著高于不考虑印度洋海温异常的情况。此外还对印度洋不同海温模态对两类厄尔尼诺事件与我国南方秋季降水关系的影响的环流成因进行了分析。
- 两类厄尔尼诺事件 /
- 热带印度洋偶极子 /
- 热带印度洋一致增暖 /
- 中国南方 /
- 秋季降水
Abstract: Based on extended SST data (ERSST V3b) from NOAA Climate Prediction Center(CPC), monthly China 160 stations' precipitation data from National Climate Center(NCC) and monthly mean horizontal wind velocity, vertical velocity and humidity data at pressure level from the National Center for Environmental Prediction/National Center for Atmospheric Research(NCEP/NCAR), the impacts of two types of El Niño events over South China precipitation in autumn was discussed. And the focus was on the impacts of different sea surface temperature anomaly modes in Indian Ocean on the relationship between two types of El Niño Events and South China autumn rainfall. The results show that during the EP(CP) El Niño autumn, precipitation in south of the Changjiang River in China is more (less).When EP El Niño and India Ocean dipole (IOD) occur simultaneously, rainfall in autumn over South China is much more than that of not considering SST of India Ocean. When CP El Niño and IOD occur simultaneously, precipitation in Southwest China is more and that in Southeast China is less. When CP El Niño and India Ocean Basin Warming (IOB) occur at the same time, rainfall over South China in autumn is less, and the less degree is greater than that without considering SST anomaly of India Ocean. In addition, the circulation cause of the Indian Ocean SST's impacrtcs was analyzed.
- two types of El Niño events /
- Indian Ocean Dipole /
- Indian Ocean Basin Warming /
- South China /
- autumn rainfall

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