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1、南方八省降雨時(shí)空特征與趨勢(shì)變化研究摘要:隨著全球變暖和人類(lèi)活動(dòng)加劇,不同區(qū)域的降水變率普遍存在不同程度的增大,導(dǎo)致的經(jīng)濟(jì)損失顯著增大。因此,研究南方八?。ǜ=ㄊ?、廣東省、廣西省、湖南省、江西省、海南省、云南省、貴州省)降雨時(shí)空特征與趨勢(shì)變化有一定的意義。本文采用南方八省內(nèi)232個(gè)氣象站點(diǎn)從1958年至2012年的逐口口降雨量,在日降雨量的基礎(chǔ)上統(tǒng)計(jì)出年降雨量、月降雨量,以多尺度對(duì)南方八省降雨的時(shí)空特征與趨勢(shì)變化進(jìn)行分析研究。分析可得,八省年降雨量出現(xiàn)以贛北、贛屮北、閩北以及閩中部分地區(qū)為中心的八省東部降雨相對(duì)高值區(qū)和以珠三角、粵西、海南以及桂南大部分地
2、區(qū)為屮心的八省南部降雨相對(duì)高值區(qū)兩大降雨高值區(qū)域,總體趨勢(shì)變化并不顯著。月降雨量的時(shí)空演變有明顯的季節(jié)性,總體不呈顯著變化,但桂北、黔東、粵西、黔西、湘西、贛東的汛期月平均降雨量呈顯著增長(zhǎng)趨勢(shì),閩中、閩東、桂西則呈顯著減少趨勢(shì)。關(guān)鍵詞:南方八省;降雨量;時(shí)空特征;趨勢(shì)變化AnalysisontheSpatial-TemporalFeaturesandtheTrendVariationofPrecipitationineightProvincesofSouthernChinaAbstract:Withtheglobalwarmingandtheinten
3、sificationofhumanactivities,precipitationvariabilityindifferentregionsoftheprevalenceofdifferentdegreesofincrease,,resultinginasignificantincreaseineconomiclosses.Therefore,theresearchonthespatial-temporalvariationcharacteristicsandthetrendvariationofprecipitationineightProvince
4、sofSouthernChinahascertainpracticalsignificanceJnthissubject,weanalyzethedailyprecipitationanddatastatisticsof232meteorologicalstationsfrom1958to2012ineightProvincesofSouthernChina(Fujian,Guangdong,Guangxi,Hunan,Jiangxi,Hainan,Yunnan,Guizhou),andonthebasisofdailyprecipitationsta
5、tisticsofannualrainfall,monthlyrainfallformultiscalespatialandtemporalrainfallcharacteristicsandtrendsanalysis.TheresultshowsthatAnnualrainfalloccursinthenorthofJiangxi,JiangxiNorth,northernFujianandcentralFujianregionasthecenteroftheeasternpartoftherainfallisrelativelyhighvalue
6、softheeightprovincesinthePearlRiverDeltaregionandthesouthern,westernGuangdong,HainanandGuangxiasthecenterofthesouthernmostpartsoftheeightprovincestworelativelyhighvaluesofrainfallrainfallhighvaluearea,theoveralltrenddidnotchangesignificantly.Temporalevolutionofmonthlyrainfallhas
7、obviousseasonal,showednosignificantchangeintheoverall.ButNorthern,easternGuizhou,western,westernGuizhou,Hunan,JiangxiEastfloodtheaveragemonthlyrainfallwassignificantgrowthtrend,centralFujian,Fujian,GuangxiWestthenshowedasignificantdecreasingtrend.Keyword:eightProvincesofSouthern
8、China;precipitation;spatial-temporalFeatures;tr