太平洋SSTA與冬季北半球大氣環(huán)流異常關(guān)系的初步分析.pdf

1、南京氣象學(xué)院碩士學(xué)位論文太平洋SSTA與冬季北半球大氣環(huán)流異常關(guān)系的初步分析姓名：陳濤申請學(xué)位級別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：孫照渤20040501ABSCRACTn把relationshipbetweenseasurfacetemperatureanomalyinPacificandthecirculationofNorthernHemisphereiSthefoCUSofairseaintemctionresearchjDrecen

2、tyearsTheSSTAinPacificcontributestemoteResponseinmid—latitudeatmosphereandisconnectedwithclimatechangesinglchatThecyclingofENSOistypical口henomenaoflargescaleinPacificairseainteractionsystemResultsofrecentobservationandnu

3、mericalexperimentsshowthatprominentdifferenceexistsbetweenairseainteractionintropicalandinmidI撕【tIdeandworkiSnotenoughreIatedtotheimpactofpersistentSSTAonthecirculationconsideringdifferentdistrictinPacificByUSeofNOAASSTa

4、ndatmospherecirculationdatasetstherelationbetweenSSTAinPacificandanomalyincirculationiSstudiedVailOUSstatisticaIresearchrevealsthatthereissignificantconelationbetweenNorthHemisphereCirculationandSSTAinWestWindDriftregion

5、勰wellasintropicaleasternPaciticwhichafethetWOkeyregionsinPacificThefrequencyanalysisofareaaveragedSSTAtimeseriesinkeyre昏onsindicatesthatthepowerspectrumpeaksiscenteredat24yr觚nualoscillationandthgffeisalS0longtemporaIscal

6、eoscillationsuchasquasidecadaloscillationrevealedbyWaveletAnalysisSingularValueDecomposition(SVD)analysisshewssignificantcorrelationexistsbetweenPacificSSTApatternsimilartopeakmaturephaseofElNinoeventandRemoteResponsePat

7、ternofPNAandWPin500hPageopotentiaIhci曲t，whichisfurtherconfirmedbySvDanalysisbetweenSSTAand850hPawindfieldsOnbaseofresultsabovecompositemodelofSSTAinPacificandcirculationanomaly砸∞constructedforanalysistheirevolutionDuring

8、maturephaseofEINinousuallyinwinterpositiveSSTAdominatesintropicaleasternoceanandnegativeSSTAdominatesinWestWitldDriflDis耐ctinmid—latitudeocearl，correspondin舀ythePNAindexof500hPageopotentialheightispositivewhichmeanstheAl

9、eutianLowgetsstrong，andthesituationissomewhatinverselyduringLaNinaphaseofSSTANumeriealexperiments對esetunforanalysisimpactofSS曩AintwokeyregionsonatlqlosphcTecirculation。UriderperpetualwinterconditionIAPR15L9AGCMissetupfor

10、sensitiveexperimentsofPacificSSTAwithoutseasonalvariabilityThecirculationofpositivePNAindexpatternispromil豫哇intheca鼴ofpersistentforcingofnegativeSSrrAinWestWindDriftregionorpositiveSSTAintropicaleasternPacificwhichisthet