ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY-中国Betway体育网页登陆

摘要 Monthlymeansurfaceairtemperaturesandprecipitationat20meteorologicalstationsintheJinshaRiverValley(JRV)ofsouthwestChinawereanalyzedfortemporal-spatialvariationpatternsduringtheperiod1961-2010.ThemagnitudeofatrendwasestimatedusingSen’sNonparametricEstimatorofSlopeapproach.ThestatisticalsignificanceofatrendwasassessedbytheMKtest.Theresultsshowedthatmeanannualairtemperaturehasbeenincreasingby0.08℃/decadeduringthepast50yearsasawhole.Theclimatechangetrendinairtemperaturewasmoresignificantinthewinter(0.13℃/decade)thaninthesummer(0.03℃/decade).Annualprecipitationtendedtoincreaseslightlythereafterandtheincreasingwasmainlyduringthecrop-growingseason.Boththegreatestvariationoftheannualmeantemperatureandannualprecipitationwereobservedatthedry-hotvalleyareaofmiddlereaches.Significantwarmingrateswerefoundintheupperreacheswhereasthedry-hotbasinsofmiddlereachesexperiencedacoolingtrendduringthepastdecades.Despiteoftheoverallincreasinginprecipitation,moreobviousupward-trendswerefoundinthedry-hotbasinsofmiddlereacheswhereastheupperreacheshadadroughttrendduringthepastdecades.

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ANALYSIS OF CLIMATE VARIABILITY IN THE JINSHA RIVER VALLEY

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