桂林地区4万年来气候变化及其动力机制浅析  

The Paleoclimatic Changes of Guilin Area since 40 000 a B.P.and Its Dynamical Mechanism

作　　者：李彬[1] 袁道先[1] 林玉石[1] 覃嘉铭[1] 张美良[1] 

机构地区：[1]中国地质科学院岩溶地质研究所

出　　处：《地球学报（中国地质科学院院报）》2000年第3期313-319,共7页Acta Geoscientia Sinica

基　　金：国家自然科学基金项目!(496 32 10 0 );原地矿部"九五"重要基础理论项目!(95 0 110 4)

摘　　要：通过桂林灌阳响水岩 1号石笋的测年和O、C同位素的详细研究 ,得出了桂林地区 4万a来高分辨率的古气候变化的连续记录 ,并揭示了由末次冰期向全新世的突变过程和 3次与Heinrich事件 (H1 、H2 、H3)对应的气候突变事件。在此基础上 ,通过与GISP2冰芯记录、古海水表面温度记录、深海海底生物的O同位素记录和苏禄海沉积物O同位素记录的对比 ,认为我国古季风环流变化的直接动力机制是全球冰量的变化。Based on the dating and the detailed studies of the oxygen and carbon isotopes of No.1 stalagmite from Xiangshuiyan cave at Guangyang, Guilin,the authirs obtained the paleoclimate record since 40,000 a B.P.till now .The record has revealed an abrupt change from the last glacial period to the Holocene epoch, and the Heinrich Event (H 1,H 2,H 3). On the basis of the correlation of the record with the oxygen isotope record of GISP2, the surface temperature record of the Antarctica,the normalized oxygen isotope record of the submarine living beings, and the oxygen isotope record of Sulu sea, the authors hold that the paleo-monsoon circulation changes might be caused by the changes of global ice amount.

关 键 词：石笋 古气候记录 季风环流变化机制 桂林 

分 类 号：P532[天文地球—古生物学与地层学]