中全新世以来查干淖尔古湖面波动

刘美萍; 哈斯

doi:10.7522/j.issn.1000-694X.2014.00050

中国沙漠 >

2015 , Vol. 35 >Issue 2: 306 - 312

DOI: https://doi.org/10.7522/j.issn.1000-694X.2014.00050

古气候与环境演变

中全新世以来查干淖尔古湖面波动

刘美萍 ,
哈斯

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1. 北京师范大学资源学院, 北京 100875;
2. 内蒙古师范大学地理科学学院, 内蒙古呼和浩特 010022

刘美萍(1988-),女,内蒙古呼伦贝尔人,博士研究生,主要从事地貌过程与生态效应研究。Email: liump2013@mail.bnu.edu.cn

收稿日期: 2014-04-29

修回日期: 2014-08-02

网络出版日期: 2015-03-20

基金资助

国家自然科学基金项目(41171002,41261008)

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Mid Holocene Paleolake Fluctuation of the Qehan Lake, Inner Mongolia, China

Liu Meiping ,
Hasi Eerdun

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1. College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China;
2. College of Geographical Science, Inner Mongolia Normal University, Hohhot 010022, China

Received date: 2014-04-29

Revised date: 2014-08-02

Online published: 2015-03-20

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摘要

内陆湖泊水位变化是对区域气候和水文变化的一种响应,古湖岸堤是过去湖泊水位变化的最直接证据。野外考察发现内蒙古高原查干淖尔湖周围存在海拔为1 026、1 023 m和1 018 m的3级古湖岸堤。根据光释光定年,其形成年代分别是6.83±0.37、4.26±0.29 ka BP和2.42±0.15 ka BP。利用DEM模型恢复得到的对应时期古湖面积分别是270、230 km²和120 km²。在6.83~4.26 ka BP时段,查干淖尔古湖高湖面稳定在1 023～1 026 m,比现代湖面约高7 m,该时段气候相对湿润,4.26 ka BP以来湖面持续下降,与区域性甚至全球性气候变化有着深刻的关系。

关键词： 全新世; 查干淖尔湖泊; 湖面波动; 环境演化

本文引用格式

刘美萍 , 哈斯 . 中全新世以来查干淖尔古湖面波动[J]. 中国沙漠, 2015 , 35(2) : 306 -312 . DOI: 10.7522/j.issn.1000-694X.2014.00050

Abstract

Inland lake level changes are extremely sensitive to regional climate and hydrology change, and ancient shorelines are the most direct evidence of lake level changes. Through the field investigation, we found that there were three lake shorelines with elevation 1 026, 1 023 m and 1 018 m around the modern Qehan Lake in Inner Mongolia and the OSL dating results of them were 6.83±0.37, 4.26±0.29 ka BP and 2.42±0.15 ka BP, respectively, and the paleo lake area were about 270, 230 km² and 120 km², respectively. The high lake level of Qehan paleo lake stand on 1 023-1 026 m in 6.83-4.26 ka BP, about 8 meters higher than modern, the climate condition then was rather humid. The overall lake fluctuation since Mid-Holocene of Qehan paleo lake was downward and the variation was almost identical to those adjacent lakes inthe arid and semi-arid area. It showed that the Mid-Holocene environmental changes of the Qehan Lake had a profound relationship with the regional and even global climate changing.

Key words： Holocene; Qehan Lake; lake fluctuation; environmental changes

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