| 近40年南澳县大风特征分析 |
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| 引用本文： | 林苗青,杜勤博,翁武坤.近40年南澳县大风特征分析[J].气象与环境学报,2010,26(4):48-52. |
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| 作者姓名： | 林苗青 杜勤博 翁武坤 |
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| 作者单位： | 1.南澳县气象局，广东 南澳 515900;2.汕头市气象局，广东 汕头 515041 |
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| 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。
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| 关 键 词： | 大风 时空变化 统计分析 气候特征 南澳 |
| 收稿时间： | 2010-5-24 |
| 修稿时间： | 2010-6-28 |
Characteristics of strong wind in the past 40 years in Nan'ao county,Guangdong province |
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| LIN Miao-qing,DU Qin-bo,WENG Wu-kun.Characteristics of strong wind in the past 40 years in Nan''ao county,Guangdong province[J].Journal of Meteorology and Environment,2010,26(4):48-52. |
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| Authors: | LIN Miao-qing DU Qin-bo WENG Wu-kun |
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| Institution: | Nan’ao Meteorological Bureau, Nan’ao 515900, China; 2. Shantou Meteorological Bureau, Shantou 515041, China |
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| 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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