| 濮阳近50a风速变化特征及突变分析 |
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| 引用本文： | Xu Qiaozhen,Wu Jianhe,Han Xiangbin,Xu Qing′e,Wang Chunling,Jia Jinming.濮阳近50a风速变化特征及突变分析[J].河南气象,2007(Z1). |
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| 作者姓名： | Xu Qiaozhen Wu Jianhe Han Xiangbin Xu Qing′e Wang Chunling Jia Jinming |
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| 作者单位： | 濮阳市气象局 河南濮阳457000 |
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| 摘 要： | 利用线性分析方法,分析了濮阳近50 a平均风速、大风日数的变化特征,并利用滑动的t检验法分析了风速突变,结果显示:年平均风速以0.498(m/s)/10 a的倾向率减少,大风和扬沙日数分别以2.7 d/10 a和5.6 d/10 a的倾向率减少;平均风速,大风、扬沙日数在20世纪80年代初期发生突变。
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| 关 键 词： | 风速 扬沙 气候变化 突变 |
Analysis of Wind Speed Variety Characteristic and Sudden Change in Recent 50a in Puyang |
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| Abstract: | The variety characteristic of the average wind speed and gale days in recent 50 years in Puyang has been analyzed by means of linear analysis.The sudden change of wind speed has been initially analyzed with moving t-test method.The results are as follows: The annual mean wind speed is decreasing at a rate of 0.498(m/s) /10a.The gale days and fly sand days are reducing at the tendency of 2.7 d/10a and 5.6 d/10a respectively.The average wind speed,the gale days and fly sand days change suddenly in the early 1980s. |
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| Keywords: | wind speed fly sand climate change sudden change |
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