干旱区生态环境知识资源中心(Arid): 青藏高原第四纪泛湖期与古气候

Arid

	青藏高原第四纪泛湖期与古气候
其他题名	The Quaternary Pan-lake （Overflow） Period and Paleoclimate on the Qinghai-Tibet Plateau
	郑绵平 1; 袁鹤然 1; 赵希涛 2; 刘喜方 1
ISSN	0001-5717
出版年	2006
卷号	80 期号:2 页码:169-180
中文摘要	对青藏高原不同位置的17个湖区进行地质调查，并结合卫星照片和地形图解译的基础上，笔者对高原泛湖区形成时间、范围和古气候进行了深入的研究。青藏高原第四纪最晚的两次高湖面（溢流面）时间约为40～30／35ka和65～53ka；在该时段高原为巨大的相互连通泛湖系所覆盖，总面积约达360000km^2，湖水总体积约达53*10^8km^3，分别较现代湖泊的总面积和总体积大38倍和659倍。在该泛湖期之前晚更新世还有3次高湖面；132～112ka、110～95ka和约91～72／83～75ka。说明青藏高原晚第四纪气候变化具有不稳定性和快速变化的特点。约40～30ka高湖面还出现在青藏高原以北腾格里沙漠。说明该时期存在特强的南亚夏季风；岁差周期20ka的太阳高辐射变化对位于地球低纬地带、高海拔地区的青藏高原有着特殊的重要性。在30ka前后，伴随青藏高原的快速抬升和古气候变冷，青藏高原周缘泛湖突然外泄，在短时间内巨量冰冷湖水倾泄人印度洋和西太平洋。该泛湖倾泄事件已造成高原周缘江、湖等环境变化。
英文摘要	Lake geomorphology and high level lacustrine deposits since the mid-late Pleistocene are well preserved in lakes of the Qinghai-Tibet Plateau. According to geological surveys of 17 lake districts in different locations of the plateau, combined with interpretations of satellite images and topographic maps, the authors studied the timing of formation and scopes of the pan-lake areas of the plateau and their paleoclimate. The latest two high lake levels （overflow surfaces） on the Qinghai-Tibet Plateau in the Quaternary occurred at -40,000 to 30, 000 a and ～ 65,000 to 53,000 a respectively. In these time intervals, the plateau was covered by huge interconnected pan-lake systems with a total area of ～36 km^2 and a total volume of lake water of 〉530 million km^2, which are about 38 times and 659 times larger than those of the modern lakes respectively. Before this pan-lake period, there had been three high lake levels that occurred at ～132,000 to 112,000 a, 110,000 to 95,000 a and 483,000 to 75,000 a BP respectively, suggesting that the late Quaternary climate on the plateau was unstable and changed rapidly. The -40,000 to 30,000 a high lake level also appeared in the Tengger desert north of the plateau, suggesting that there existed very strong summer monsoons from South Asia then ; the variation in solar radiation with a 20,000 precessional period has special importance for the high-altitude Qinghai Tibet Plateau in the low-latitude zone of the Earth. Around 30,000 a BP, the pan lakes at the peripheries of the Qinghai-Tibet Plateau drained out suddenly with rapid uplift of the plateau and cooling. In a short time the huge amount of cold lake water emptied into the Indian Ocean and Western Pacific. The draining event of the pan-lakes brought about the environmental changes of rivers and lakes at peripheries of the plateau.
中文关键词	青藏高原 ; 第四纪泛湖 ; 古气候 ; 古季风 ; 泛湖倾泄事件
英文关键词	Qinghai-Tibet Plateau Quaternary pan-lake paleoclimate paleo-monsoon draining event of pan-lakes
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:2332004
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219582
作者单位	1.中国地质科学院盐湖与热水资源研究发展中心, 北京 100037, 中国; 2.中国地质科学院, 盐湖资源与环境研究重点开放研究实验室, 北京 100037, 中国
推荐引用方式 GB/T 7714	郑绵平,袁鹤然,赵希涛,等. 青藏高原第四纪泛湖期与古气候[J],2006,80(2):169-180.
APA	郑绵平,袁鹤然,赵希涛,&刘喜方.(2006).青藏高原第四纪泛湖期与古气候.,80(2),169-180.
MLA	郑绵平,et al."青藏高原第四纪泛湖期与古气候".80.2(2006):169-180.