Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0031-0182 |
EISSN | 1872-616X |
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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