| 热带海温影响我国南方冬季降水年际变化的年代际差异及其成因 |
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| 引用本文： | 张福颖,黄乾,董丽娜.热带海温影响我国南方冬季降水年际变化的年代际差异及其成因[J].气象科学,2019,39(5):635-643. |
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| 作者姓名： | 张福颖 黄乾 董丽娜 |
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| 作者单位： | 南京信息工程大学 大气科学学院, 南京 210044,南京信息工程大学 大气物理学院, 南京 210044,南京信息工程大学 大气科学学院, 南京 210044 |
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| 基金项目： | 国家重点基础研究发展计划（973）项目（2015CB453201）；中国电力建设股份有限公司项目（DJ-ZDZX-2016-02） |
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| 摘 要： | 利用中国740个站逐月降水资料、NOAA月平均海表温度资料和NCEP/NCAR再分析资料,采用统计学方法分析了近50 a(1961/1962至2010/2011年冬季)海温异常对我国南方冬季降水年际变化影响的年代际差异及其成因。结果表明:(1)中国冬季降水大致位于长江以南的我国南方地区,降水年际变化较强。1987年后,在El Niňo年中国南方冬季降水偏多。(2)中国南方冬季降水与赤道中东太平洋海温异常以及海洋性大陆西部海温异常密切相关。但相关性存在年代际差异:1987年之前,主要与海洋性大陆西部海温异常相关;1987年之后,主要与赤道中东太平洋海温异常密切相关,海洋性大陆西部海温异常次之。(3)1987年之前,海洋性大陆西部海温通过影响东亚环流形势和水汽条件影响我国南方降水;在1988年之后,海洋性大陆的影响趋于减弱,而赤道中东太平洋海温异常通过改变水汽条件影响我国南方冬季降水强度。
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| 关 键 词： | 中国南方 冬季降水 热带海温 年际 年代际 |
| 收稿时间： | 2019/4/2 0:00:00 |
| 修稿时间： | 2019/4/29 0:00:00 |
Interdecadal difference of sea temperature influencing interannual variation of winter precipitation in South China |
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| ZHANG Fuying,HUANG Qian and DONG Lina.Interdecadal difference of sea temperature influencing interannual variation of winter precipitation in South China[J].Scientia Meteorologica Sinica,2019,39(5):635-643. |
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| Authors: | ZHANG Fuying HUANG Qian and DONG Lina |
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| Institution: | School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China,School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China and School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | Based on the monthly precipitation data from 740 stations in China, NOAA monthly mean sea surface temperature data and NCEP/NCAR reanalysis data, the interdecadal differences and their causes of the effects of sea surface temperature anomalies (SSTA) on the annual variation of winter precipitation in South China over the past 50 years (1961/1962 to 2010/2011 winter) were analyzed by statistical methods in this paper. The results show that:(1) The winter precipitation in China is mainly located in the south of the Yangtze River, with strong interannual variation. After 1987, winter precipitation in the El Niño year was higher in South China. (2) Winter precipitation in South China is closely related to SSTA in the equatorial Middle East Pacific Ocean and in the western part of the Oceanic Continents. However, there are interdecadal differences in correlation. Before 1987, it was mainly related to the SSTA in the western part of the Oceanic Continents while it was mainly related to the SSTA in the equatorial Middle East Pacific Ocean after 1987, followed by the SSTA in the western part of the Oceanic Continents. (3) Before 1987, the sea surface temperature in the western part of Oceanic Continents affected the precipitation in South China by affecting the circulation situation in East Asia and water vapor conditions. After 1988, the influence of oceanic continents tended to be weaken, while the sea surface temperature anomaly in the equatorial Middle East Pacific affected the winter precipitation intensity in southern China by changing water vapor conditions. |
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| Keywords: | South China winter precipitation sea temperature interannual interdecadal |
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