J4 ›› 2010, Vol. 28 ›› Issue (3): 265-269.

• 综述 • 上一篇    下一篇

青藏高原气温变化的研究进展

王楠李栋梁张杰   

  1. 南京信息工程大学大气科学学院,江苏南京 210044
  • 收稿日期:2010-04-20 修回日期:2010-07-14 出版日期:2010-09-30 发布日期:2010-09-30
  • 作者简介:王楠(1986-) ,女,吉林延边人,硕士研究生,主要从事气候变化及其预测研究. E-mail: wangnan1986yang@163.com
  • 基金资助:

    国家自然科学基金(40805009)及2010气象行业专项(GYHY201006038)共同资助

Climatic Characteristics of Daily Precipitation from May to September in Recent 45 Years in Qilian Mountains

 WANG Nan, LI Dong-Liang, ZHANG Jie   

  1. 1.Institute of Arid Meteorology,China Meteorological Administration,Key Laboratory of Arid Climatic Change
    and Reducing Disaster of Gansu Province,Lanzhou 730020,China; 2. Jiayuguan Meteorological Bureau of Gansu
    Province,Jiayuguan 735100,China; 3. Weather Modification Office of Gansu Province,Lanzhou 760020,China;
    4. Dingxi Meteorological Bureau of Gansu Province,Dingxi 743000,China
  • Received:2010-04-20 Revised:2010-07-14 Online:2010-09-30 Published:2010-09-30

摘要:

青藏高原( 简称高原,下文同) 是全球气候系统的重要组成部分,其气候因子、动力及热力作用对全球气候系统的变化有着深刻的影响。本文就近代高原地表气温不同年代际的变化、空间分布及其与我国其它区域同期气温变化的关系等方面的研究进展进行回顾和总结。经过研究分析表明,高原的气温变化呈明显的年代际特征。近百年来高原的气温可分2 个冷期2 个暖期,其间有3 次突变,即1920 年代以前偏冷,1920 ~ 1950 年代气温回升,1950 ~ 1980 年代气温下降,1980 年代至今气温持续偏高。各次气温突变时间中高原均提前于我国其它地区,且全国有北方提前于南方,高纬提前于低纬的现象; 高原上大多数区域日最低气温增温幅度是日最高温度的增温幅度的1 ~ 3 倍,日较差变小,4季中冬季增温最为明显; 由于地域辽阔,地形复杂,就高原本身主体而言,各区域的温度变化也存在差异。已有的研究成果表明,高原主体的气温变化最先出现在高原东南部和海拔较高的区域。

关键词: 青藏高原, 气温突变, 特征, 区域差异

Abstract:

different level rainy days and its homologous precipitation quantity are obtained by using the daily precipitation data from
May to September ( 1960 - 2004) of 17 stations in the Qilian Mountain area,thus,we know the daily precipitation intensity of light
rainfall and moderate rainfall( and more) at each station. Based on regional mean value of the different level rainy days and rainfall intensity
in Qilian Mountain area,the tendency of the different level rainy days and rainfall intensity was analyzed using linear trend coefficient
and 5 levels main value function. The results show that both precipitation and different level rainy days from May to September
in Qilian Mountain area presented more in the west side and less in the east side in the same latitude area,and more in the east and
less in the west part of Qilian Mountain. In recent 45 years,the light rainfall days was descending,but the moderate rainfall days was
ascending. The precipitation intensity of light rainfall and moderate rainfall ( and more) presented ascending trend too from May to September
in Qilian Mountain area. The morlet wave analysis show that the light rainfall days had a period of five years,but the period of the moderate rainfall ( and more) days was more complex.

Key words: Qilian Mountain area, rainy days, trend, wave analysis

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