地理科学 ›› 2002, Vol. 22 ›› Issue (1): 29-33.doi: 10.13249/j.cnki.sgs.2002.01.29

• 论文 • 上一篇    下一篇

藏北高原地气之间的水分循环

杨梅学, 姚檀栋, 何元庆, 张晓君, 马耀明   

  1. 中国科学院寒区旱区环境与工程研究所, 甘肃, 兰州, 730000
  • 收稿日期:2000-07-31 修回日期:2001-02-01 出版日期:2002-01-20 发布日期:2002-01-20
  • 基金资助:
    中国科学院资源环境领域知识创新工程重大方向项目(KZCX-301)、国家自然科学基金项目(40171020)、中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室创新项目(210506)、中国科学院寒区旱区环境与工程研究所"知识创新工程"项目(CACX210072)资助.

The Water Cycles Between Land Surface and Atmosphere in Northern Part of Tibetan Plateau

YANG Mei-xue, YAO Tan-dong, HE Yuan-qing, ZHANG Xiao-jun, MA Yao-ming   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, the Chinese Academy of Sciences, Lanzhou, Gansu 730000
  • Received:2000-07-31 Revised:2001-02-01 Online:2002-01-20 Published:2002-01-20

摘要: 利用GAME-Tibet期间所取得的高分辨率土壤温度、含水量以及降水量资料,对藏北高原地气之间的水分循环过程进行了分析.结果表明,唐古拉山以南平坦地表7~8月份地表蒸发的水汽量可达177 1 mm,占同期降水量的73.2%;唐古拉山以北平坦地表7~8月份地表蒸发的水汽量可达73.3 mm,占同期降水量的7.7%.地表土壤通过蒸发不但将大量的水分输送给其上的大气,而且将热量传给了其上的大气,从而抑制了土壤温度的升高.如果仅就唐古拉山南北地表蒸发而言,引起其较大差异的原因主要是降水量的不同.

Abstract: The water cycle processes in large scale were studied by many scientists. However, the studies of the water cycle processes between land and atmosphere are still not so much. This is especially true on Tibetan Plateau. Because the soil temperature and moisture distribution reflect the soil wet/dry and energy conditions, the variation of the temporal and spatial distributions of the soil moisture and temperature is one of the very important parts in the water cycle processes in land atmosphere system. In order to examine the water and energy cycle processes on Qinghai-Xizang(Tibet) Plateau and their roles in the context of the Asian monsoon system, the GAME (GEWEX Asian Monsoon Experiment) Tibet project was carried out. In this paper, using the high temporal resolution soil moisture and temperature as well as precipitation data of GAME Tibet, the water cycle processes between land surface and atmosphere in the northern part of Tibetan Plateau were analyzed. The results showed that the evaporation from the flat lan surface from July to August is 177.1mm(73.3mm) in the south(north) side of Tanggula Mt., which is 73.2%(57.7%) of the precipitation in the same period. The evaporation processes not only transport much water but also much energy from land surface to atmosphere, which can restrain the rising of the soil temperature. The difference of the evaporation between the two sides of Tanggula Mt. is mainly caused by the difference of precipitation in the two sides.

中图分类号: 

  • S332.2/S152.7