主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报

• 论文 • 上一篇    下一篇

近40年南澳县大风特征分析

林苗青1;杜勤博1;翁武坤2   

  1. 1.南澳县气象局,广东 南澳 515900;2.汕头市气象局,广东 汕头 515041
  • 收稿日期:2010-05-24 修回日期:2010-06-28 出版日期:2010-08-29 发布日期:2010-08-29

Characteristics of strong wind in the past 40 years in Nan’ao county, Guangdong province

LIN Miao-qing1;DU Qin-bo1;WENG Wu-kun2   

  1. Nan’ao Meteorological Bureau, Nan’ao 515900, China; 2. Shantou Meteorological Bureau, Shantou 515041, China
  • Received:2010-05-24 Revised:2010-06-28 Online:2010-08-29 Published:2010-08-29

摘要: 利用1970—2009年南澳县气象局地面气象观测站风向、风速记录资料进行统计分析。结果表明:近40 a南澳县年平均风速为3.7m/s,秋季最大,冬季次之,夏季最小;年平均最大风速为13.8m/s,春季最大,冬季次之,夏季最小;年平均大风日数为68 d,冬季最多,春季次之,夏季最少;近40 a来的年平均风速、平均最大风速和年大风日数均呈减少趋势;大风日数年内变化呈一峰一谷型;最多风向为ENE风向,NNE和NE风向位居第二,偏西风最少。

关键词: 大风, 时空变化, 统计分析, 气候特征, 南澳

Abstract: Based on the observation data from 1970 to 2009 in Nan’ao county, the characteristics of wind direction and wind speed were analyzed. The results indicate that mean annual wind speed is 3.7 m/s in the past 40 years, and it is the largest in autumn then in winter and the smallest in summer The maximum of mean annual wind speed is 13.8 m/s, and it is the largest in spring then in winter and the smallest in summer. Mean annual strong wind days are 68 d, and it is the most in winter then in spring and the smallest in summer. Annual mean wind speed and annual strong wind days are the decreasing trends, so is the mean maximum wind speed. There is a peak value and a valley value for month variations of strong wind days. ENE wind direction is most, and then NNE and NE, while westerly wind is least.

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