J4 ›› 2004, Vol. 22 ›› Issue (3): 11-16.

• 论文 • 上一篇    下一篇

江南地区汛期降水与热带海温关系的SVD 分析

王谦谦1 ,陈绍东1 ,2
  

  1. 1. 南京气象学院气候与环境江苏省重点实验室( KLME) ,江苏南京 210044 ;2. 广东省气象局,广东广州 510080
  • 收稿日期:2004-08-14 修回日期:2004-08-16 出版日期:2004-09-30 发布日期:2004-09-30
  • 作者简介:王谦谦(1942-) ,女,上海人,教授,主要从事气候诊断和模拟研究.
  • 基金资助:

    国家自然科学基金重点项目(40233037) 和面上项目(40175021) 资助

SVD Analysis of the Relationship Between Jiangnan Rainy Season Precipitation and Sea Surface Temperature in the Tropical Oceans

WANG Qian-Qian1, CHEN Chao-Dong1,2   

  1. (1. Jiangsu Provincial Key Lab for Climate and Environment ( KLME) ,Nanjing Institute of Meteorology ,Nanjing
     210044 ,China ;2. Guangdong Provincial Meteorological Bureau ,Guangzhou  510080 ,China)
  • Received:2004-08-14 Revised:2004-08-16 Online:2004-09-30 Published:2004-09-30

摘要:

江南汛期降水异常的分析指出,6 月是江南最易发生降水异常的一个月。从空间分布看,降水异常最易发生在江南的中部地区。用SVD 方法分析发现,与江南汛期降水异常相关的海温异常分布型是“翘翘板”型,关键区恰好位于相关最显著的部位,前一年5~7 月为海温的关键影响时段,且与汛期中4~5 月的降水有最好的负相关关系。在该海温异常型影响下,次年中国东部4~6 月的降水异常表现为长江南北的反位相变化特征,而江南地区位于该雨型相关显著的部位,江南中部为其影响最显著的区域。

关键词: 江南汛期降水异常, 海温异常, SVD 分析

Abstract:

Analysis of the climatological features of Jiangnan rainy season precipitation anomalies shows that the month with the most
frequent anomalies of precipitation in Jiangnan is J une and the region is located in the middle of Jiangnan. The SVD analysis points
out that the related sea surface temperature anomaly (SSTA) distributes in the pattern as a“seesaw”. The key region is just located
in the most evident correlation area. The key period of SSTA impact is from May to J uly in the previous year in which SSTA has the
best negative correlation with April to May precipitation in Jiangnan. Under the influence of SSTA“seesaw”pattern the precipitation
anomalies in the following April to J une in East China exhibit opposite phase on both sides of the Yangtze River , the most evident
correlative region is Jiangnan and the middle of which is located in the most obvious area of SSTA impacts.

Key words: Jiangnan rainy season precipitation anomaly , SSTA , SVD analysis

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