黄河源区全新世以来的古气候演化  

PALEOCLIMATE EVOLUTION OF THE YELLOW RIVER SOURCE AREAS SINCE HOLOCENE EPOCH

作　　者：张玉芳[1] 张俊牌[1] 徐建明[1] 林防 

机构地区：[1]地质矿产部水文地质工程地质研究所

出　　处：《地球科学（中国地质大学学报）》1995年第4期445-449,共5页Earth Science-Journal of China University of Geosciences

基　　金：地质矿产部"八五"重点基础项目

摘　　要：综合分析钻孔剖面的孢粉及易溶盐等气候代用指标，揭示了黄河源区全新世以来的古气候演变规律。全新世古气候划分为３期：（１）１０．４～７．５ｋａＢ．Ｐ为升温期；（２）７．５～３．５ｋａＢＰ。为大暖期；（３）３．５ｋａＢ．Ｐ．至现今为降温期。各期的界限是剧烈的升温或降温事件，气候波动具有千年尺度的振荡规律。所反映的气候变化规律与青藏高原其他地区一致，大暖期要比中国东部滞后大约１．５ｋａ。黄河源区自３．５ｋａＢ．Ｐ．以来，气温呈逐渐降低、湿度呈逐渐变干的趋势。Through a comprehensive analysis using the indexes of climate proxy materials such as readily soluble salts and spore-pollen of borehole profiles,the paleoclimate evolution pattern of the Yellow River source area since Holocene is revealed The paleoclimate in Holocene can be divided into threestages：(1）10400-7500aB.P.as anathermal;(2)7500-3500aB.P.as megathermal;(3)3500aBP.to present as katathermal.The boundaries of each two periods marked by the strongly anathermal or katathermal events.The climate fluctuations have the vibration feature with a thousand year scale,consistent with that of other areas of Qinghai-Tibet Plateau In comparison with that of the Eastern China,the megathermal stage is about 1500a later.Since Late Holocene,both the temperature and humidity in the Yellow river source areas show the tendency of gradual decrease.

关 键 词：黄河源区 全新世 古气候 大暖期. 

分 类 号：P532[天文地球—古生物学与地层学]