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河西走廊大风持续时间的气候特征

董安祥1方锋2张宇1刘德祥2   

  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开放实验室,甘肃兰州730020;
    2.西北区域气候中心,甘肃兰州730020
  • 出版日期:2014-08-01 发布日期:2014-08-01
  • 作者简介:董安祥(1944-),男,江苏南京市人,大学,研究员,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)”共同资助

Climate Characteristics of Gale Duration in Hexi Corridor

DONG Anxiang1FANG Feng2ZHANG Yu1LIU Dexiang2   

  1. 1. Institute of Arid Meteorology,Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Key Open Laboratory of Climate Change and Disaster Reduction of CMA,Lanzhou 730020,China;
    2. Climate Center of the Northwest Region,Lanzhou 730020,China
  • Online:2014-08-01 Published:2014-08-01

摘要:

分析了河西走廊1980~2010年一日大风持续时间的气候特征。结果表明:河西走廊一日大风平均和最长持续时间的空间分布特征与大风日数基本一致,总体上自东向西自南向北增多,且随海拔高度的升高而增多全区年大风平均持续时间在7~207 min之间,平均为65 min大风一日最长持续时间是1390 min酒泉市大部永昌民勤和乌鞘岭年大风平均和最长持续时间偏长,其余地方偏短各季大风平均和最长持续时间,春季最长冬季次长夏季最短秋季次短年一日大风持续时间的频率为偏态分布,在0~2 h的累积频率为0.67风速偏小站大风的持续时间基本为0~12 h,风速偏大站大风的持续时间在12~24 h,这说明风速越大,大风的持续时间越长。

关键词: 河西走廊, 大风日, 持续时间, 气候特征

Abstract:

Based on the minutely gale duration at 19 weather stations in Hexi Corridor during 1980 - 2010,the climate characteristics of daily gale duration on the strong wind days were analyzed. The results indicated that the spatial distribution of average and longest daily duration of gale was basically in accord with the gale days. As a whole,the daily duration of gale increased from east to west and from south to north,and increased with increase in altitude. With respect to annual character,the average daily duration of gale was between 7 to 207 minutes,and the mean value was 65 minutes in whole region of Hexi Corridor. The longest daily duration of gale was 1 390 minutes,and which in Minqin,Jiuquan,Yongchang and Wushaoling was relatively longer than that in the other regions. In four seasons,the average and longest daily duration of gale in spring,winter,fall,and summer reduced in turn.The frequency distribution of the daily duration of gale was abnormal. The cumulative frequency of gale daily duration between 0 to 2 hours was 0.67.The daily duration of gale at the stations with a small wind speed was generally 0 to 12 hours,while that of the stations with a large wind speed was 12 to 24 hours.Thus it can be seen that the daily duration of the gale was longer as the wind speed became larger.

Key words: Hexi Corridor, gale days, duration, climate characteristic

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