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1、江西農(nóng)業(yè)學(xué)報(bào)2014,26(9):86~89ActaAcuhuraeJiangxi撫州市近50年降水氣候特征分析鄭勁光,楊曉明,周媛(1.江西省撫州市氣象臺(tái),江西撫州344000;2.江西省撫州市臨川區(qū)氣象局,江西撫州344000;3.江西省氣象局,江西南昌330046)摘要:利用1961~2010年撫州市逐日降水資料,對(duì)撫州市年降水量進(jìn)行時(shí)空分布特征分析,結(jié)果表明:年平均降水量空間分布極為不均,年平均降水量最少為1692.5mm,最多為1979.1mm,東部多于西部,北部多于南部;降水量存在著明顯的年際、年代際差異,
2、總體呈增加趨勢(shì),平均以25.3mm/10a的速度增加;降水量暖季多冷季少,年降水量主要集中在汛期4—7月,占年平均降水量的54.9%;EOF分析表明,撫州市年降水量空間分布主要呈現(xiàn)總體一致型,共同的天氣影響系統(tǒng)和環(huán)流形勢(shì)是其決定性因素;但也存在著南北與東西分布差異,這是由影響系統(tǒng)強(qiáng)弱、移動(dòng)路徑與地形等因素共同造成的。關(guān)鍵詞:撫州市;降水;線性趨勢(shì);EOF分解;氣候特征中圖分類號(hào):P463.24文獻(xiàn)標(biāo)志碼:A文章編號(hào):1001—8581(2014)09—0086—04AnalysisofClimateFeaturesof
3、PrecipitationinFuzhouCityinRecent50YearsZHENGJing—guang,YANGXiao—ming2ZHOUYuan,(1.FuzhouMunicipalMeteorologicalObservatoryofJiangxiProvince,F(xiàn)uzhou344000,China;2.MeteorologicalBureauofLinchuanDistrictofFuzhouCityinJiangxiProvince,F(xiàn)uzhou344000,China;3.Meteorologic
4、alBureauofJiangxiProvince,Nanchang330046,China)Abstract:BasedonthedailyprecipitationdataofFuzhoucityduring1961—2010,thespatialandtemporaldistributionchar-acteristicsofannualprecipitationinthiscitywereanalyzed.Theresultsshowedthatthespatialdistributionofannualave
5、ragepreeip—itationwasextremelyuneven,theannualaverageprecipitationvariedfrom1692.5mmto1979.1mm,anditwasmoreineasternandnorthernpart,whilelessinwesternandsouthernpart.Theprecipitationexistedobviousinterannualandinterdecadaldiffer—ences,anditgenerallyshowedanincre
6、asingtrendwiththeaverageincreasingrateof25.3mm/lOa.Theprecipitationinwarnlsea—sonwasmorethanthatincoldseason,andtheprecipitationfromApriltoJulywasthemostwithinayear,accountingfor54.9%oftheannualaverageprecipitation.EOFanalysisindicatedthatthespatialdistributiono
7、fannualprecipitationinFuzhoucitywasgen—erallyconsistent,whichwasdecidedbythecommonweatheraffectingsystemandcirculationsituation;therewasalsodifferencesinthespatialdistributionofannualprecipitationbetweenthenorthandthesouth,andbetweentheeastandthewest,whichwascau
8、sedbytheintensityoftheaffectingsystem,movingpathandgeographytogether.Keywords:Fuzhoucity;Precipitation;Lineartrend;EOFdecomposition;Climaticfeatures降水是一個(gè)地區(qū)氣候變化最直接、最敏感