J4 ›› 2005, Vol. 23 ›› Issue (2): 13-18.

• 论文 • 上一篇    下一篇

青藏高原东北侧夏季降水的气候特征分析

王遂缠1李栋梁2王谦谦3
  

  1. 1.    兰州中心气象台,甘肃 兰州 730020;2.中国科学院寒区旱区环境与工程研究所,甘肃兰州730000;3.南京气象学院.江苏 南京 210044
  • 收稿日期:2004-12-22 修回日期:2005-03-29 出版日期:2005-06-30 发布日期:2005-06-30
  • 作者简介:王遂缠(1975- ),男,甘肃省秦安人,工程师,主要从事天气气候诊断研究.Email:wangsc@gsma.gov.cn
  • 基金资助:

    国家973项目( (2000048705)和中科院寒区旱区环境与工程研究所知识创新工程项目( 2004121)资助

Analysis on the Climatic Characteristics of the Precipitation  in Northeastern Side of Tibetan Plateau in Summer

WANG Sui-chan1,LI Dong-liang2,WANG Qian-qian3   

  1. 1. Lanzhou Central Meteorological Obsematory,Lanzhou  730020, China; 2. Cold and Arid Regions Environmental and Engineering
    Research Institute,Academy of Sciences ,lanzhou  730000, China;  3. Nanjing Institute of Meteorology,Nanjing  210044,China
  • Received:2004-12-22 Revised:2005-03-29 Online:2005-06-30 Published:2005-06-30

摘要:

利用西北地区均匀分布的126个地面测站,采用REOF和模糊聚类方法对降水的空间特征进行研究发现,青藏高原东北侧是西北地区夏季降水最为敏感的自然区,主要雨季为7-8月,几乎占全年总降水的一半,该区域少雨年的概率大于多雨年,旱年和多雨年交替出现。6月降水在近40 a里呈上升趋势,7月降水总体变化不大,8月呈下降趋势,从降水线性趋势来看,整个夏季降水无明泉变化。另外,y温距平和降水距平百分率具有明显的反位相变化关系,近40 a来气温呈缓慢升高趋势。

关键词: 青藏高原东北侧, 降水, 气候特征

Abstract:

Based on precipitation data in 126 surface stations in Northwest China, using REOF and tial characteristics of summer preclpltahon mNnlthwest China  were analyzed in the paper. Results Blur-clustering method, the spa-show that the northeastern side of Tibetan Plateau is the most tion is mostly a half of that nant.  PTPClpltatlOn  trend  In sensitive region to summer precipitation in Northwest China, the rainy 凡e月凡On (July to August) precipita-m a peal pears Wlth less Taln are  mOTe than Ta1nV  VeaTS  in the region, and dry and flood years al'e  a.Itel'-
.Tune is ascending changing in recent 40 years, changing slowly in July, and descending in August, fiom the liner trend, the summer precipitation is nnconspicnonsly.  Moreover, temperature departure and precipitation departure percent present reverse phase, and temperature is rising in recent 40 years.

Key words:  Northestern side of Tibetan Plateau, precipitation, climatic characteristics

中图分类号: