地理学报 ›› 2002, Vol. 57 ›› Issue (4): 437-442.doi: 10.11821/xb200204008

• 环境变化 • 上一篇    下一篇

西北地区东部群发性强沙尘暴序列的建立与分析

周自江1, 王锡稳2   

  1. 1. 国家气象中心, 北京 100081;
    2. 兰州中心气象台, 兰州 730020
  • 收稿日期:2001-06-04 修回日期:2001-09-26 出版日期:2002-07-25 发布日期:2010-09-06
  • 作者简介:周自江 (1970- ), 男, 工程师, 主要从事气象资料整编与应用研究。E-mail:zzj@rays.cma.gov.cn
  • 基金资助:

    国家重点基础研究发展规划项目 (G2000048703) 和中国科学院知识创新工程重大项目 (KZCX2-305)

Construction and Analysis of Severe Group Dust-storms in the Eastern Part of Northwest China

ZHOU Zijiang1, WANG Xiwen2   

  1. 1. National Meteorological Center, Beijing 100081, China;
    2. Lanzhou Central Meteorological Observatory, Lanzhou 730020, China
  • Received:2001-06-04 Revised:2001-09-26 Online:2002-07-25 Published:2010-09-06
  • Supported by:

    The National Key Basic Research Project of China, No. G2000048703; Key Knowledge Innovation Project of CAS, No. KZCX2-305

摘要:

利用1954~2001年60个站的气象实测资料,探讨了西北地区东部群发性强沙尘暴的认定标准,建立起该地区近48年较完整的群发性强沙尘暴序列,并初步分析了该地区群发性强沙尘暴的时空分布特征和年际变化。结果表明:近48年西北地区东部共出现了99例群发性强沙尘暴;阿拉善高原、鄂尔多斯高原及河西走廊的大部分地区是强沙尘暴的主要多发区;强沙尘暴的多发季节为3~5月,约占全年的78.8%;强沙尘暴的发生次数、持续时间和覆盖范围以20世纪90年代最少、最短和最小,但是1997年以后有明显的增加趋势。

关键词: 西北地区东部, 群发性强沙尘暴, 时空分布特征

Abstract:

Based on the available original duststorms data from 60 meteorological observation stations, the paper constructed a quite complete series of severe group duststorms in the eastern part of Northwest China in 1954-2001. As a result, 99 severe group dust-storms have been found and confirmed in the eastern part of Northwest China in 1954-2001. Based on these 99 cases, the temporal and spatial distribution characteristics, especially inter-decade change of severe group duststorms were analyzed in the eastern part of Northwest China, and the following viewpoints were noted: (1) Alasan Plateau, most parts of Erdos Plateau and most parts of Hexi Corridor were the main area influenced by severe group duststorms, where there were generally more than 10 severe duststorms at some places and more than 20 events in some stations such as Minqin in Gansu Province in recent 48 years. (2) The major number of severe group duststorms is in spring, and the figure was 78.8%, especially in April there were 41 events and the figure was 41.4%. (3) The number of severe group dust-storms during the 1990s was 15, which is less than other decades. At the same time, the life cycle and the influencing area of severe group duststorms during the 1990s are shorter and smaller too. (4) In 2000 and 2001, there are 4 severe group duststroms broke out separately in the eastern part of Northwest China. It is the maximum after 1983.

Key words: eastern part of Northwest China, severe group dust-storms, temporal and spatial distribution characteristics