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时间:2020-05-04
《抚州市近50年降水气候特征分析-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、江西农业学报2014,26(9):86~89ActaAcuhuraeJiangxi抚州市近50年降水气候特征分析郑劲光,杨晓明,周媛(1.江西省抚州市气象台,江西抚州344000;2.江西省抚州市临川区气象局,江西抚州344000;3.江西省气象局,江西南昌330046)摘要:利用1961~2010年抚州市逐日降水资料,对抚州市年降水量进行时空分布特征分析,结果表明:年平均降水量空间分布极为不均,年平均降水量最少为1692.5mm,最多为1979.1mm,东部多于西部,北部多于南部;降水量存在着明显的年际、年代际差异,
2、总体呈增加趋势,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,抚州市年降水量空间分布主要呈现总体一致型,共同的天气影响系统和环流形势是其决定性因素;但也存在着南北与东西分布差异,这是由影响系统强弱、移动路径与地形等因素共同造成的。关键词:抚州市;降水;线性趋势;EOF分解;气候特征中图分类号:P463.24文献标志码:A文章编号:1001—8581(2014)09—0086—04AnalysisofClimateFeaturesof
3、PrecipitationinFuzhouCityinRecent50YearsZHENGJing—guang,YANGXiao—ming2ZHOUYuan,(1.FuzhouMunicipalMeteorologicalObservatoryofJiangxiProvince,Fuzhou344000,China;2.MeteorologicalBureauofLinchuanDistrictofFuzhouCityinJiangxiProvince,Fuzhou344000,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降水是一个地区气候变化最直接、最敏感
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