J4 ›› 2005, Vol. 23 ›› Issue (4): 17-23.

• 论文 • 上一篇    下一篇

中国西北地区雨季降水与500 hPa高度场的SVD分析

魏锋1,2丁裕国3杨金虎2王若升4   

  1. 1.兰州中心气象台,甘肃兰州730020;2.甘肃省定西市气象局,甘肃定西743000;3.南京信息工程人学,江苏南京210044;4.甘肃省平凉市气象局,甘肃平凉744000
  • 收稿日期:2005-06-20 修回日期:2005-09-13 出版日期:2005-12-31 发布日期:2005-12-31
  • 作者简介:魏锋(1967一),男,甘肃通渭人,高级工程师,硕士,从事天气预报工作.E- mail: dxweifen@126.com
  • 基金资助:

    甘肃省气象局2005年度青年科技基金“甘肃省汛期雨日特征与预测研究”「甘气发(2004 ) 201资助

SVD Analysis of the Relationship between 500 hPa Height Fields and Precipitation Fields in Rainy Season in Northwest China

 WEI Feng1,2, DING Yu-Guo3, YANG Jin-Hu2, WANG Re-Sheng4   

  1.    1.  Lanzhou Central Meteorological Observatory  Lanzhou 730020  China;
      2.  Dingxi Meteorological Bureau of Cansu Provinc;e}  Dingxi 743000  Gansu  China;
                3.  Nanjing Institute of Meteorology  Nanjing210044,  China;
    4.  Pingliang Meteorological Bureau of Cansu Province, Pingliang744000,  Gansu China
  • Received:2005-06-20 Revised:2005-09-13 Online:2005-12-31 Published:2005-12-31

摘要:

利用西北地区 131个测站(1961~2000年)的逐旬降水量和国家气候中心整编的(1960~2000年)逐月北半球500 hPa 5 x 10高度场网格资料,分析了西北地区平均雨季起讫时段,并用SVD方法分析雨季降水与500 hPa高度场的关系。结果表明,西北地区多雨期在5一9月,但雨季起讫时
间的分布较为复杂,7月上旬至9月上旬可代表主卞要降水区的雨季。西北地区雨季降水除与同期500hPa环流有关外,还与前期3 -5月、12 -2月的500 hPa环流有关,但不同时期的影响关键区有很大的不同。

关键词: 西北地区, 雨季, 500 hPa高度场, SVD分析

Abstract:

The average beginning and ending period of rainy season in Northwest China was analyzed by using the precipitation data of ten
days by ten days from 131 stations in Northwest China and monthly height grid data of 50 x 100at 500 hPa over Northern Hemisphere from
1960 to 2000 and the relationship between precipitation and 500 hPa height field was analyzed by SVD method in rainy season. The re-
sups show that the rainy phase is from May to September and the distribution style of the beginning and ending period of rainy season is
、omplex} but the first ten days in July to the first ten days in September、an represent the rainy season in  main precipitation area.  The
precipitation in rainy season not only has relationship with the same一period 500 hPa(irc;ulation but also with the previous periods 500 hPa
(irc;ulation from March to May and from December to February but the key areas effected by different period(irc;ulation is great different

Key words:  Northwest China, rainy season, 500 hPa height field, SVD method

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