近12000aB.P.以来博斯腾湖地区古气候变化的沉积物稳定同位素及其他指标的记录(英文)

Palaeoclimatic Oscillation Since about 12 000yr B.P. at Bosten Lake, Southern Xinjiang, NW China,Reflected in Abundance and Stable Isotope Composition of Sediment Carbonate

根据南疆博斯腾湖湖相沉积物碳酸盐稳定同位素、孢粉及化学元素含量的研究，揭示了近12000 aB.P.以来古气候与古水文状况的变化过程与特征，其气候的演化特征与新疆地区地质记录基本一致，具有明显的西风型环境演变特征，表现为冷与相对湿润、暖与相对干旱的水热配置关系揭示了本地区近12000 a B.P.以来出现了一系列冷暖变化，其中暖峰主要出现于11 500～11 000 a、9 400 a、7 500 a、3 000 a和2 000 aB.P.,气候特征以干暖为主，湖泊水文特征总体表现为盐度增加，水位下降，湖面缩小；而冷峰主要出现于11 000～10 000 a、8 800 a、5 000 a、3 300 a和1 500 aB.P，主要表现为湿润程度有所改善，相应地，湖泊膨胀淡化，湖面上升而在7 000～5 000 aB.P.期间出现的相对暖湿的环境特征可能是全新世大暖期暖湿的气候特征的反映。

The purpose of this contribution is to review the evolution of climatic and hydrology since past 12000yr B.P. as reflected in Bosten lake lacustrine sediment, southern Xinjiang.Sediment carbonate stable isotopic composition, carbonate content, pollen result and geochemical indice record many oscilliations representing climatic changes in north region in southern Xingjiang. Several climatic changes with the nature of "Abrupt Climatic changes" are revealed. The only one relative warmhumid phase appeared during 7000～5000yrB.P. may be deduced from the Megathermal Maximum.