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冰川冻土 ›› 2014, Vol. 36 ›› Issue (2): 347-351.doi: 10.7522/j.issn.1000-0240.2014.0042

• 冰冻圈与全球变化 • 上一篇    下一篇

河西走廊特殊地形与大风的关系探讨

董安祥1, 胡文超2, 张宇1, 刘德祥3   

  1. 1. 中国气象局 兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局 干旱气候变化与减灾重点实验室, 甘肃 兰州 730020;
    2. 甘肃省气象服务中心, 甘肃 兰州 730020;
    3. 西北区域气候中心, 甘肃 兰州 730020
  • 收稿日期:2013-08-14 修回日期:2014-02-07 出版日期:2014-04-25 发布日期:2014-05-20
  • 作者简介:董安祥(1944-),男,江苏南京人,研究员,1966年毕业于南京信息工程大学,现主要从事气候变化研究.E-mail:dax-2364@163.com
  • 基金资助:
    中国气象局业务项目“气候变化情景下甘肃省未来40年干旱灾害发生趋势”;中国电力工程顾问集团公司技术成果“西北特殊地域大风特性及线路设计研究”(DG1-D03-2011);国家发改委专项“甘肃应对气候变化规划思路研究”(1213042)资助

Study of the relationship between gale and the peculiar terrain in the Hexi Corridor

DONG Anxiang1, HU Wenchao2, ZHANG Yu1, LIU Dexiang3   

  1. 1. Institute of Arid Meteorology, China Meteorological Administration/Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province/Key Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Lanzhou 730020, China;
    2. Meteorological Service Center of Gansu Province, Lanzhou 730020, China;
    3. Regional Climate Center of Northwest China, Lanzhou 730020, China
  • Received:2013-08-14 Revised:2014-02-07 Online:2014-04-25 Published:2014-05-20

摘要: 运用河西走廊1951-2010年大风资料,参考相应地区的的地形特征,探讨了地形与大风发生的关系. 结果表明:地形的狭管效应对局地大风风速的突然加强是河西走廊多大风的重要原因,海拔是影响大风日数、最大风速和持续时间的重要因素. 祁连山的阻挡作用是造成山区北侧大风日数偏少、最大风速偏小和持续时间偏短的重要因素;地形与河谷走向是影响大风风向的重要因素.

关键词: 河西走廊, 特殊地形, 大风, 狭管效应

Abstract: Relationship between terrain and gale occurred in the Hexi Corridor was discussed by using wind information in the Hexi Corridor from 1951 to 2010 and considering relevant topographic features. It is found that the major reason for suddenly strengthening local gale in Hexi Corridor is the canal effect of terrain. Gale days, maximum wind speed and duration depend on a lot of factors, of which the controlling factor is altitude. Less wind days, lower maximum wind speed and shorter wind duration are due to a lot of factors, of which the significant one is that the gale is obstructed by the Qilian Mountains. Gale direction depends on a lot of factors, of which the controlling one is the terrain and valley direction.

Key words: Hexi Corridor, special terrain, gale, canal effect

中图分类号: 

  • P425.4