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中国沙漠 ›› 1998, Vol. 18 ›› Issue (1): 32-37.

• 研究论文 • 上一篇    下一篇

沙尘暴降尘在甘肃的沉降状况研究

张宁, 黄维, 陆荫, 康颖琦   

  1. 甘肃省环境监测中心站 兰州 730030
  • 收稿日期:1997-03-02 修回日期:1997-08-17 出版日期:1998-03-20 发布日期:1998-03-20
  • 作者简介:张宁,男,1953年生,高级工程师。主要从事环境监测和大气颗粒物化学及相关研究工作。

STUDY ON THE DEPOSITION SITUATION OF SAND DUST STORM IN GANSU REGION

ZHANG Ning, HUANG We, LU Yin, KANG Ying qi   

  1. Gansu Environmental Monitoring Central Station, Lanzhou, 730000
  • Received:1997-03-02 Revised:1997-08-17 Online:1998-03-20 Published:1998-03-20

摘要: 对1986~1996年以来,发生在我国西北地区的12次较大沙尘暴个例,首次结合大气自然降尘背景值的监测结果,研究了沙尘暴降尘在甘肃境内的沉降范围和分布状况,给出了沙尘暴降尘在这一区域内的沉降量。同时还讨论了沙尘暴降尘在甘肃的分布和黄土堆积问题。沙尘暴降尘在甘肃的分布是以河西走廊东部为中心,并向大气环流下游地域扩散,形成一个自西北向东南迅速递减的梯度分布状态。11年间发生的较大沙尘暴,在甘肃境内共降尘3758.37×104t。

关键词: 甘肃, 沙尘暴降尘, 分布, 沉降量

Abstract: The studing results to 12 times of sand dust storms taking place in North China during 1986 ̄1996 as well as the natural dust background values have given out the distributing situation of sand dust deposition in Gansu region. The distribution of sand dust in the studied area concentrated at the eastern part of Hexi Corridor and extended its range through atmospheric circulation, which has formed a gradient distributing state decreasing rapidly toward Southeast from Northwest. The total amount of sand dust deposition on Gansu territory from those relatively great storms within 11 years was estimated at 375837×104t. In the paper, the relation of sand dust deposition with loess deposit has been discussed also.

Key words: Gansu, Sand dust storm deposition, Distribution, The Quantity of deposition

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