寧波市年降水量時空變化特征
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P467 X591

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寧波市農科教結合項目資助


Spatial and Temporal Characteristics of Annual Precipitation in Ningbo
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    摘要:

    應用主分量分析、氣候突變檢驗、“墨西哥帽”小波分析及譜分析等多種方法對寧波市1953~2003年的年降水量進行了時空特征分析.結果表明:寧波市所轄7個氣象站年降水量呈現出從西南往北-東北方向遞減的趨勢,與全市地形走向基本一致,年降水量最大、最小值相差400 mm左右;全市各地年降水量的年際變化趨勢是一致的;寧波市區年降水量在20世紀60年代末到70年代初接近突變臨界值,近年也有發生轉折的趨勢;進入21世紀以來,寧波市年降水量處于偏少的氣候背景中,2003年變化最為劇烈;寧波市區年降水量有準4年的振蕩周期.

    Abstract:

    Based on the 51-year annual precipitation data of Ningbo from 1953 to 2003,a detailed analysis is performed by means of several diagnosis methods,including EOF,climatic abrupt change testing,Mexico hat wavelet and spectrum analysis.The results show that annual rainfall amount across the city tends to descend from the southwest to north-northeast,which accords with the topographic features of the city;the difference between maximum and minimum precipitation is about 400 mm.EOF1 of spatial characteristic vectors indicates that the annual precipitation of all the seven weather stations has a coincident tendency.Ningbo experienced an abrupt climate change in annual precipitation during the late 1960's and the early 1970's,and another significant change took place in recent years.The annual precipitation has been less than normal since the beginning of the 21st century with the minimum in 2003.There is a quasi-four year periodicity in annual precipitation.

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涂小萍 錢燕珍.寧波市年降水量時空變化特征[J].氣象科技,2006,34(3):271~274

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  • 收稿日期:2005-01-10
  • 定稿日期:2005-03-10
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