Arid
DOI10.1016/j.palaeo.2012.09.032
Millennial-scale erosion rates in three inland drainage basins and their controlling factors since the Last Deglaciation, arid China
Li, Yu1,2,3; Wang, Nai’ang1; Morrill, Carrie2,3; Anderson, David M.2,3; Li, Zhuolun1; Zhang, Chengqi1; Zhou, Xuehua1
通讯作者Li, Yu
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2012
卷号365页码:263-275
英文摘要

In the regions surrounding the Qinghai Tibet Plateau, changes in erosion rates have been linked to the tectonics, climate and topography over different time scales. To understand the mechanisms governing the changes of erosion rates, it is important to study erosion rates by different methods and for different time scales. In inland drainage basins, deposition rates of terminal lake sediments can indicate basin-wide erosion rates at the millennial-scale. This paper presents three lake records of the Last Deglaciation and Holocene (Huahai Lake, Zhuye Lake and Yanchi Lake) from the Hexi Corridor, north of the Qilian Mountains, in arid China. Organic matter, terrestrial pollen concentrates, seeds, grasses and plant debris are used for conventional and AMS C-14 dating. On the basis of 66 radiocarbon dates, lithology and grain-size, we infer relatively high basin-wide erosion rates during the Last Deglaciation and early Holocene in the three drainage basins, when the three lake sediments were seriously affected by reworking. The deposition rates were an order of magnitude or greater in these lakes during the Last Deglaciation and early Holocene than during the mid-to-late Holocene. During the transition period of the last glacial-interglacial cycle, significant climatic changes occurred in East and Central Asia, corresponding to the strengthening of the Asian summer monsoon and to increasing effective moisture in arid Central Asia, which can have strong impacts on basin-wide erosion rates north of the Qinghai Tibet Plateau. Moreover, melting glaciers in the Qilian Mountains probably also contributed to the high basin-wide erosion rates. At the same time, tectonic activity was not recognizable in the study area during that period. In the arid and semiarid regions surrounding the Qinghai Tibet Plateau, dramatic changes in erosion rates appear during the transition periods of the glacial-interglacial cycles, which illustrate the climatic controls on erosion rates at this time scale. (C) 2012 Elsevier BM. All rights reserved.


英文关键词The Last Deglaciation Holocene Lake sediments Arid China Deposition rates Erosion rates Climate Glaciers
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000312183500018
WOS关键词STRATH-TERRACE FORMATION ; ASIAN MONSOON ; CLIMATE-CHANGE ; QUATERNARY GLACIATION ; MOISTURE EVOLUTION ; HIGH-RESOLUTION ; TENGGER DESERT ; ROCK UPLIFT ; HOLOCENE ; RECORD
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
来源机构兰州大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174322
作者单位1.Lanzhou Univ, Ctr Hydrol Cycle & Water Resources Arid Reg, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China;
2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80305 USA;
3.NOAAs Natl Climat Data Ctr, Paleoclimatol Branch, Boulder, CO 80305 USA
推荐引用方式
GB/T 7714
Li, Yu,Wang, Nai’ang,Morrill, Carrie,et al. Millennial-scale erosion rates in three inland drainage basins and their controlling factors since the Last Deglaciation, arid China[J]. 兰州大学,2012,365:263-275.
APA Li, Yu.,Wang, Nai’ang.,Morrill, Carrie.,Anderson, David M..,Li, Zhuolun.,...&Zhou, Xuehua.(2012).Millennial-scale erosion rates in three inland drainage basins and their controlling factors since the Last Deglaciation, arid China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,365,263-275.
MLA Li, Yu,et al."Millennial-scale erosion rates in three inland drainage basins and their controlling factors since the Last Deglaciation, arid China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 365(2012):263-275.
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