西太平洋暖池核心区上新世以来浮游有孔虫氧同位素特征及古海洋变化  

OXYGEN ISOTOPE CHARACTERISTIC AND PALEOCEANOGRAPHIC VARIATIONS OF THE WESTERN PACIFIC WARM POOL SINCE PLIOCENE

作　　者：郭建卿[1] 成鑫荣[2] 陈荣华[2,3] 翦知湣[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,东营257061 [2]同济大学海洋地质国家重点实验室,上海200092 [3]国家海洋局第二海洋研究所,国家海洋局海底科学重点实验室,杭州300012

出　　处：《海洋地质与第四纪地质》2010年第3期87-95,共9页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(40331002)

摘　　要：西太平洋暖池区作为驱动全球气候变化引擎,是近年来古海洋学尤其是古气候研究的热点。以南海大洋钻探ODP130航次807站浮游有孔虫的氧同位素值为材料,建立了西太平洋暖池核心区跨越4.5 Ma、分辨率达2-3 ka的天文年代标尺,通过浮游有孔虫表层种和次表层种的氧同位素的变化来分析温跃层、上部水体垂直结构的变化,结合频谱分析以及与地球轨道参数（ETP）的交叉频谱分析,研究始新世以来尤其是北极冰盖形成时期西太平洋暖池的演变及其对地球轨道驱动的响应,为全球气候环境演化提供科学依据。As the global climate engine,the western Pacific warm pool is the hot issue concerning paleoceanography and paleoclimate research.Through the planktonic foraminifera oxygen isotope from ODP 130 at site 807A,we established the Astronomical Timescale for the past 4.5 Ma.The time resolution is better than 2-3 ka.We studied the depth of thermocline and the upper water column structure variation by the oxygen isotope changes of surface genus and sublayer genus of plantonic foraminifera.Combined with frequence analysis and cross frequence analysis with Earch Trace Parameter（ETP）,we studied the evolution of western Pacific warm pool since Pliocene,especially during the stage of ice sheet formation at North Pool,and its response to earch orbit changes,that provided a scientific foundation for global climate evolution.

关 键 词：氧同位素值 温跃层 米兰科维奇旋回 西太平洋暖池 中更新世气候转型 

分 类 号：P736.2[天文地球—海洋地质]