气候变化领域集成服务门户(CCPortal): Quaternary glaciation of Muztag Ata and Kongur Shan: Evidence for glacier response to rapid climate changes throughout the Late Glacial and Holocene in westernmost Tibet

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DOI	10.1130/B26339.1
	Quaternary glaciation of Muztag Ata and Kongur Shan: Evidence for glacier response to rapid climate changes throughout the Late Glacial and Holocene in westernmost Tibet
	Seong, Yeong Bae; Owen, Lewis A.; Yi, Chaolu; Finkel, Robert C.
通讯作者	Seong, YB (通讯作者)
发表日期	2009
ISSN	0016-7606
EISSN	1943-2674
起始页码	348
结束页码	365
卷号	121 期号:3-4
英文摘要	The glacial geology of two massifs, Muztag Ata and Kongur Shan, in western Tibet was examined to help define the timing and style of glaciation in the semiarid regions of western Tibet. Remote sensing, geomorphic mapping, and Be terrestrial cosmogenic nuclide (TCN) surface-exposure dating of boulders on the moraines and sediment in depth profiles show that glaciers advanced at least 12 times during at least the last two glacial cycles. Over this time, the style of glaciation changed progressively from one that produced ice caps to one that produced less extensive and more deeply entrenched valley glaciers. The timing of the two earliest glaciations is poorly defined, but they likely occurred prior to the penultimate glacial cycle (the Karasu glacial stage) and the early part of the last glacial cycle or during the penultimate glacial cycle (the Subaxh glacial stage). In contrast, the timing of later glacial advances (the Olimde glacial stage) is relatively well defined showing quasiperiodical oscillations on millennial time scales (17.1 +/- 0.3 ka, 13.7 +/- 0.5 ka, 11.2 +/- 0.1 ka, 10.2 +/- 0.3 ka, 8.4 +/- 0.4 ka, 6.7 +/- 0.2 ka, 4.2 +/- 0.3 ka, 3.3 +/- 0.6 ka, 1.4 +/- 0.1 ka, and a few hundred years before the present). These data suggest that since the global Last Glacial Maximum (LGM), the glaciers in western Tibet likely responded to Northern Hemisphere climate oscillations (rapid climate changes), with minor influences from the south Asian monsoon. This study provides the first well-defined glacial geologic evidence to suggest that glaciers in western Tibet respond to rapid climate changes on millennial time scales throughout the Late Glacial and Holocene.
关键词	EQUILIBRIUM-LINE ALTITUDES ICE CORE RECORDS COSMOGENIC BE-10 NORTH-ATLANTIC ASYNCHRONOUS GLACIATION KARAKORAM MOUNTAINS NUCLIDE PRODUCTION GLOBAL CLIMATE COLD EVENT HIMALAYA
英文关键词	glacial geology; Tibet; Muztag Ata; Kongur Shan; geochronology; terrestrial cosmogenic nuclide surface-exposure dating; midlatitude westerlies; Late Glacial; Holocene; rapid climate changes
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000262964700003
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257687
推荐引用方式 GB/T 7714	Seong, Yeong Bae,Owen, Lewis A.,Yi, Chaolu,et al. Quaternary glaciation of Muztag Ata and Kongur Shan: Evidence for glacier response to rapid climate changes throughout the Late Glacial and Holocene in westernmost Tibet[J]. 中国科学院青藏高原研究所,2009,121(3-4).
APA	Seong, Yeong Bae,Owen, Lewis A.,Yi, Chaolu,&Finkel, Robert C..(2009).Quaternary glaciation of Muztag Ata and Kongur Shan: Evidence for glacier response to rapid climate changes throughout the Late Glacial and Holocene in westernmost Tibet.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,121(3-4).
MLA	Seong, Yeong Bae,et al."Quaternary glaciation of Muztag Ata and Kongur Shan: Evidence for glacier response to rapid climate changes throughout the Late Glacial and Holocene in westernmost Tibet".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 121.3-4(2009).