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      氣候變化研究進(jìn)展 ?? 2008, Vol. 4 ?? Issue (006): 347-351.

      ? 研究短論 ? 上一篇    下一篇

      近30a我國5級以上風(fēng)日數的時(shí)空變化特征

      王小玲 宋文玲   

      1. 國家氣候中心氣候系統診斷預測室
      • 收稿日期:2007-12-25 修回日期:2008-03-31 出版日期:2008-11-30 發(fā)布日期:2008-11-30
      • 通訊作者: 王小玲

      Spatial and Temporal Variations in Windy Days over Category 5 in China During 1975-2005

        

      1. National Climate Center
      • Received:2007-12-25 Revised:2008-03-31 Online:2008-11-30 Published:2008-11-30

      摘要: 利用全國397個(gè)測站逐日最大風(fēng)速資料,分析了1975-2005年我國5級以上風(fēng)日數的氣候平均特征和長(cháng)期變化趨勢。研究表明:5級以上風(fēng)主要出現在我國北方地區,受地形和海陸分布影響,南方局部地區5級以上風(fēng)日數也較多。就季節分布而言,春季最多,夏季次之,秋季最少。5級風(fēng)日數的比例在我國南方地區大于北方,6級以上風(fēng)日數比例則呈現北多南少的分布特征。近30 a我國5級以上風(fēng)日數呈線(xiàn)性減少趨勢,春季風(fēng)日數的減少趨勢較其他季節明顯,其中5級風(fēng)日數的變化趨勢較其他級風(fēng)日數更為顯著(zhù)。

      關(guān)鍵詞: 風(fēng)日數, 氣候特征, 空間分布, 變化趨勢

      Abstract: Based on the daily maximum wind speed (10-minute mean) data of 397 stations in China, the climatological characters and the linear trends of windy days over category 5 were analyzed during 1975-2005. The results show that winds over category 5 occurred in most of northern China and in some local areas and the narrow coastal zone of southern China. The windy days were the most in spring, the next in summer, and the least in autumn. The ratio of annual windy days for category 5 to the total number of windy days over category 5 was greater in southern China than in northern China, but the opposite was true for the ratio of category 6. The windy days over category 5 generally showed linear decreasing trends during the past 30 years, and the decreasing trend was more remarkable in spring than in other seasons. The linear deceasing trend for category 5 was more distinctive than that for the other categories.

      Key words: windy days, climatological characters, spatial distribution, trend

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