J4 ›› 2005, Vol. 23 ›› Issue (1): 10-16.

• 论文 • 上一篇    下一篇

西北地区夏季降水异常及其水汽输送和环流特征分析

何金海1,刘芸芸1,常越1,2   

  1. 1.南京信息工程大学大气科学系,江苏 南京 210044:2.广东省广州市气象局,广东 广州 510080
  • 收稿日期:2005-01-11 修回日期:2005-02-25 出版日期:2005-03-31 发布日期:2005-03-31
  • 作者简介:何金淑(1941- ) ,男,江苏人,教授,博i:生导师,主要从事季风、海气相互作用、气候变化等研究
  • 基金资助:

    宁夏科技攻关重点项R.我区天气异常与突变规律的诊断及监测预警技术”资助

Analysis of Summer Precipitation Anomaly and the Feature of Water Vapor Transport and Circulation in Northwest China

HE Jin-hai1,LIU Yun-yun1,CHANG Yue2   

  1. 1. Department of Atmospheric Sciences, Nanjing University of Meteorology, Nanjing  210044, China; 2. Guangzhou Meteorological Bureau, Guangzhou  510080,China
  • Received:2005-01-11 Revised:2005-02-25 Online:2005-03-31 Published:2005-03-31

摘要:

利用NCEP/NCAR 1951 }-2000年共50 a的再分析资料及我国酉北地区内31个代表站的降水资料,对酉北地区近50 a来夏季降水异常的时空特征、环流形势及水汽输送进行了研究。分析发现,酉北地区夏季降水异常与东部沿海地区的降水旱反位相分布,说明酉北地区和东部沿海地区的降水影响系统不同,影响时期不一致。分析结果表明,影响酉北地区夏季多、少雨年的相关区域环流特征和水汽输送特征有撤著差异、

关键词: 酉北地区, 夏季降水异常, 环流特征, 水汽输送

Abstract:

Summer precipitation anomaly and the feature of water vapor transport and circulation in Northwest China are studied by using the NCEP/NCAR reanalysis data from 1951 to 2000 and rainfall observations of 31 representative stations in Northwest China.It is found that the phases between precipitation anomaly in Northwest China flnencing systems and periods to summer rainfall are di$erent between those and that in east mast of China are opposite, and the Intwn aeras. Results show that the circnlatinn and water Vapor transport of dry years in the related areas are significantly different from those of wet years.

Key words: Northwest China;
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precipitation anomaly,
circulation features, water vapor transport

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