淮河流域冬春季土壤溫濕異常對夏季降水異常的影響.pdf

1、南京氣象學(xué)院碩士學(xué)位論文淮河流域冬春季土壤溫濕異常對夏季降水異常的影響姓名：孫丞虎申請學(xué)位級別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：何金海李維京20040501ImpactofHuaiRiverbasinsoiltemperatureandhumidityabnormalityinpre—winterandspringtimeontheanomaloussummerrainfallAbstractWithREOFanalyzetechnique，

2、themain]YanomalousspatjalfeaturesofSOilhumidityinthe050cmlayerof1[uaiRivetbasinandtheirrelatiORStodifferentperiodsofprecipitationandairtemperaturearespeciallYanalyzedbyusingtheobserveddatajneludingdekadaveragedSOilmoistu

3、re，precipirationandairtemperaturedataovertheeastoCChinafrom1990to2000Theresultsindicatethatinthespringtimethe30cmlayersollcanbetreatedasaboundaryFrom0cmlayerto30cmlayer，thefirstrotatedloadingvectorfieldineverylayerreflec

4、tstheanomalOUSsollhumiditypatterninIluaiRiverhasin，wecallthepatternstructureas‘HuMRiverpattern’Whilefrom30emlayerto50cm1ayer，thesecondrotatedloadingvectorfieldineverylayeriSalSOquitesimilarto’HuMRiverpattern’Inthesurrmle

5、randautumnthe‘HuaiRiverpattern’iSstiIlremarkablebutthefeatureiS1essprominentthanthatinthespringtimeWealSOfindsoilmoistureanomalyofthiSpatternineverylayerhasnotabledurationandaprominentperiodofnearlyfortydekadsFurthermore

6、Positive(negative)correlationbetweensoilmoistureandprecipitation(airtemperature)duringprophaseandthesameperiodcallbefoundAndnegative(positive)correlationbetweensoilmoistureandtheprecipitation(airtemperature)ofnearlyhalfa

7、year1atercanalSObenotedSincethesummerrainfallabnormalityhasCioselyrelationshi口withboththesoilmoistureandtemperatureabnormalityWestudytheimpactofpre—wintertimeandspringtimesoilmoistureandtemperatureonthesummerrainfallover