地理科学 ›› 1991, Vol. 11 ›› Issue (1): 1-9,99.doi: 10.13249/j.cnki.sgs.1991.01.1

• 论文 •    下一篇

中国干旱气候划分及其特征

徐淑英   

  1. 中国科学院、国家计划委员会地理研究所, 北京
  • 出版日期:1991-01-20 发布日期:1991-01-20

CLASSIFICATION OF ARID CLIMATE IN CHINA AND ITS CHARACTERISTICS

Xu Shuying   

  1. Institute of Geography, Academia Sinica and the State Planning Commission, Beijing
  • Online:1991-01-20 Published:1991-01-20

摘要: 本文用年干燥度、年降水量和≥10℃积温作为划分干旱气候指标。在此基础上将干旱区域分为两大类,三型及16个区。干旱区属大陆性气候。干燥少雨,降水从东向西减少。降水集中在夏季,很少暴雨。干旱区风大并多沙暴,少云,日照长,冬冷夏热,气温年较差与日较差均大。有些干旱区,日照、热量和降水配合较好,有利于农作物生长。

Abstract: In this paper,annual aridity coefficients,annual rainfall and ≥10℃ accumulated temperature are taken as the indexes for the classification of arid climate.On this basis,the arid area is divided into two great types,three patterns and 15 zones.The arid area belongs to continental climate,dry and scarce rainfall.The rainfall decreases rapidly from east(500mm)to west(10mm),and is concentrated in summer.Heavy rain seldom occurs,but once it,occurs,it brings flood and disaster to the people.Wind force in the arid area is large and brings sand-storm.There are less lower cloud and longer sunshine time in the arid area than the humid area.Air temperature is low in winter and high in summer.The ranges of annual and daily air temperature variation are the.largest in China.During rainy season,there are plenty of sunshine and heat resource,which are advantageous to crop growth.