干旱区生态环境知识资源中心(Arid): 粒度和元素证据指示的居延海1.5 ka BP来环境演化

Arid

	粒度和元素证据指示的居延海1.5 ka BP来环境演化
其他题名	Evolution and Climate Changes of the Juyan Lake Revealed from Grain Size and Geochemistry Element Since 1 500 a BP
	靳鹤龄; 肖洪浪; 张洪; 孙忠
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2005
卷号	27 期号:2 页码:233-240
中文摘要	居延海是黑河的终端湖, 在最近3 000 a来已由原来面积800 km2逐渐萎缩而最终干涸, 同时其周边环境也发生了巨大的变化.东居延海(索果诺尔)湖相沉积的粒度和元素资料研究结果表明: 明清以前湖泊的变化主要受气候变化的影响, 温暖时期, 气候偏湿, 入湖水量增多, 湖泊面积扩大, 流域化学风化作用增强; 寒冷时期, 气候偏干, 入湖水量减小, 湖泊萎缩, 流域化学风化作用减弱.明清之后特别是近40 a来, 由于黑河上中游地区大规模的土地开发及水资源利用, 入湖水量不断减小, 甚至河流断流, 最终导致了目前居延海的干涸.
英文摘要	The Juyan Lake, located in the north of Ejin Banner of Alxa League in Inner Mongolia, is a terminal lake of the Heihe River. The water area of the lake has gradually shrunk from 800 km~2 and even dried up in the past 3 000 years. The environ-ment around the lake has also changed enormous-ly. What is the reason bringing about such enor-mous changes? In this paper the lake evolution and climate changes are studied by analyzing the granu-larity and chemical elements of the lacustrine sedi-ments in the Juyan Lake. The following conclu-sions are drawn: The lake evolution was controlled mainly by climate changes before Ming and Qing Dynasties, when the warm-humid climate resulted in an in-crease of inflow to the lake, which made the lake area expand and the chemical weathering strength-en; whereas the cold-arid climate resulted in a de-crease of inflow to lake, which corresponded to lake water level drop, lake area shrank and chemi-cal weathering weaken. After Ming and Qing Dynasties, especially in the recent 40 years, the anthropogenic factor pre-dominated the lake evolution process. The Heihe River continuously decreases its inflow to the lake, because of large-scale land development, finally the Juyan Lake dried up due to zero inflow.
中文关键词	居延海 ; 粒度 ; 化学元素 ; 湖泊变迁
英文关键词	Juyan Lake grain size chemical elements lake evolution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:1916946
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205917
作者单位	中国科学院,寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	靳鹤龄,肖洪浪,张洪,等. 粒度和元素证据指示的居延海1.5 ka BP来环境演化[J]. 中国科学院西北生态环境资源研究院,2005,27(2):233-240.
APA	靳鹤龄,肖洪浪,张洪,&孙忠.(2005).粒度和元素证据指示的居延海1.5 ka BP来环境演化.冰川冻土,27(2),233-240.
MLA	靳鹤龄,et al."粒度和元素证据指示的居延海1.5 ka BP来环境演化".冰川冻土 27.2(2005):233-240.