19278.冰消期以來(lái)貴州竹蹓坪洞石筍氧同位素研究

1、學(xué)位論文獨(dú)創(chuàng)性聲明本人鄭重聲明：所提交的學(xué)位是本人在導(dǎo)師指導(dǎo)下進(jìn)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(shí)驗(yàn)、數(shù)據(jù)和有關(guān)材料均是真實(shí)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(jī)構(gòu)已經(jīng)發(fā)表或撰寫過(guò)的研究成果。其他同志對(duì)本研究所做的貢獻(xiàn)均已在論文中作了聲明并表示了謝意。學(xué)位論文作者簽名：弼中荔目日期：紗r3Jr77學(xué)位論文使用授權(quán)聲明研究生在校攻讀學(xué)位期間論文工作的知識(shí)產(chǎn)權(quán)單位屬南京師范大學(xué)。學(xué)校有權(quán)保存本學(xué)位論文的電

2、子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部?jī)?nèi)容，可以采用影印、復(fù)印等手段保存、匯編本學(xué)位論文。學(xué)校可以向國(guó)家有關(guān)機(jī)關(guān)或機(jī)構(gòu)送交論文的電子和紙質(zhì)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(xué)位論文屬于保密論文，密級(jí)：么拉保I密期限為——年。學(xué)位論文作者簽名：鐘鞠指導(dǎo)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