19278.冰消期以來貴州竹蹓坪洞石筍氧同位素研究

1、學位論文獨創(chuàng)性聲明本人鄭重聲明：所提交的學位是本人在導師指導下進行的研究工作和取得的研究成果。本論文中除引文外，所有實驗、數(shù)據(jù)和有關材料均是真實的。本論文中除引文和致謝的內(nèi)容外，不包含其他入或其它機構已經(jīng)發(fā)表或撰寫過的研究成果。其他同志對本研究所做的貢獻均已在論文中作了聲明并表示了謝意。學位論文作者簽名：弼中荔目日期：紗r3Jr77學位論文使用授權聲明研究生在校攻讀學位期間論文工作的知識產(chǎn)權單位屬南京師范大學。學校有權保存本學位論文的電

2、子和紙質文檔，可以借閱或上網(wǎng)公布本學位論文的部分或全部內(nèi)容，可以采用影印、復印等手段保存、匯編本學位論文。學校可以向國家有關機關或機構送交論文的電子和紙質文檔，允許論文被查閱和借閱。(保密論文在解密后遵守此規(guī)定)＼、保密論文注釋：本學位論文屬于保密論文，密級：么拉保I密期限為——年。學位論文作者簽名：鐘鞠指導教師簽日期：沙f7即7日AbstractAbStraCtAsafaStandsensitiVephysicalsystem，the

3、Asianmonsoon(AM)isanactivecomponentofatmosphericcirculationandplaysasigni6cantroleintheglobalhydrologicandenergycyclesStalagmites丘omtheAMregionareidealtenestrialarchiVesi11thattheycanrenectchangesintheAMstren舒h，sotheyare

4、uniquelypositionedinpaleoenVkomentalstudiesInthisthesis，twoStalagmiteswerecollected仔omZhuliupingcaVe，whereisinfluencedbysoutheastandalsosouthwestAsiasummermonsoonsAtimeseriesofAsiansummermonsoonvariability丘om14Oto46kaBPi

5、sreconstructedbasedon10highprecisionU／Thdatesand984oxygenisotopedataDuringthe14O～46ka，thelongtenntrendoftheZhuliupillgcave6180reoordcorrelatesthesummerinsolationat33aNlatitudeThefactthatthegoodreplicationof6180signalbetw

6、eenZhuliupingCaveandothersintheAMareaduringthecontemporaneousgro叭hperiodsindicatesthatthe6180s遮nalinthesecavesarecontrolledbvacommonclimatefactorandthe6180canrevealtheAMclimatechangesoncemennial—decadalscalesThe6180curVe

7、sshowclearlvthemillennialcenterulialclimateeventssimilartotheNonhAtlantiCregion，inwhichincludeYDeVent，Allerodand82kaeVentintheHolocene，whichindicatesthereisastrikingrelationofforcingandresponsebetweentheAMandpolarregionc

8、limateMoreoVer，thehighresolutionclimateeVentsequencesofthestalagm“ereflecttheprocessandtransitionfbaturesoftheseeVentsAlleradpresentatrendofcoldanddrytowarnlandwetasawholeClimatechangesoftheearlyperiodsinYDeVentismoresha

9、perthanthatthelateYDeVentandtheYDeventcomprisemorethantencold／warmoscillationswithanamplitudeofoVer2％oAllthesedecadalcentennialclimateinformationhasacorrespondingrelationtoGreenlandicecorerecordBVcomparinghighresolution6

10、”0recordsofstalagmite仔omZhuliupingwith，1vv—l—that仔omQunfcaVe(Oman)，theDonggecaVe(Guizhou)，andtheShanbaocave(Hubei)，wefindthatthelong—termtrendsofthesestalagmiterecordsa野eewellwitheachother，suggestingchangesofIndianandEas

11、tAsiansummermonsoonarenotoutphaseatmiHennial—centennialscale0urrecordsproVidedirecteVidencesthatthereisamoreprecisecorrelationbetweenAMandGreenlandclimateoncentennialscalesduringtheearIyHolocene，whichindicatesthatearlyHo