西昆仑山甜水海24万年以来生态环境演化的孢粉学证据  

Palynological Evidence of Ecological Environment Change Since 240 ka BP for the Tianshuihai Lake, West Kunlun Mountains

作　　者：刘光秀[1,2,3] 王睿[1,2,3] 李世杰[1,2,3] 李炳元[1,2,3] 朱照宇[1,2,3] 

机构地区：[1]中国科学院兰州冰川冻土研究所 [2]中国科学院,国家计划委员会地理研究所 [3]中国科学院广州地球化学研究所

出　　处：《冰川冻土》1998年第1期21-24,共4页Journal of Glaciology and Geocryology

基　　金：国家"八五"攀登计划

摘　　要：西昆仑山甜水海深５６３２ｍ的钻孔岩芯孢粉记录表明，本地区２４０ｋａＢＰ以来，高寒荒漠植被一直占主导地位，但其间有草原成分蒿增加的若干波动，它反映了寒冷干旱气候背景下的湿润温和波动，亦反映了生态环境的脆弱性．依据钻孔孢粉组合特征及蒿藜比值变化划分出的１０个带，代表了气候环境的１０次波动．Pollen record from a drilling core 56.32 m in depth in the Tianshuihai Lake, West Kunlun Mountains, indicates that alpine desert vegetation is dominant since 240 ka BP in this region, but there are several fluctuations of Artemisia which is main component of steppe, reflecting that there exist several warmer and weter intervals under the cold and dry climate background. According to the changes of pollen kinds and the ratio of Artemisia and Chenopodiaceae (A/C), the pollen record can be divided into 10 zones, showing 10 climatic fluctuations and an ecological environment fragitity in this area.

关 键 词：生态环境 孢粉记录 甜水海 昆仑山 第四纪 

分 类 号：Q913.663[天文地球—古生物学与地层学]