Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quascirev.2011.03.010 |
Age, origin and climatic controls on vegetated linear dunes in the northwestern Negev Desert (Israel) | |
Roskin, Joel1; Porat, Naomi2; Tsoar, Haim1; Blumberg, Dan G.1; Zander, Anja M.3 | |
通讯作者 | Roskin, Joel |
来源期刊 | QUATERNARY SCIENCE REVIEWS |
ISSN | 0277-3791 |
出版年 | 2011 |
卷号 | 30期号:13-14页码:1649-1674 |
英文摘要 | The stabilized northwestern (NW) Negev vegetated linear dunes (VLD) of Israel extend over 1300 km(2) and form the eastern end of the Northern Sinai - NW Negev Erg. This study aimed at identifying primary and subsequent dune incursions and episodes of dune elongation by investigating dune geomorphology, stratigraphy and optically stimulated luminescence (OSL) dating. Thirty-five dune and interdune exposed and drilled section were studied and sampled for sedimentological analyses and OSL dating, enabling spatial and temporal elucidation of the NW Negev dunefield evolution. In a global perspective the NW Negev dunefield is relatively young. Though sporadic sand deposition has occurred during the past 100 ka, dunes began to accumulate over large portions of the dunefield area only at similar to 23 ka. Three main chronostratigraphic units, corresponding to three (OSL) age clusters, were found throughout most of the dunefield, indicating three main dune mobilizations: late to post last glacial maximum (LGM) at 18-11.5 ka, late Holocene (2-0.8 ka), and modern (150-8 years). The post-LGM phase is the most extensive and it defined the current dunefield boundaries. It involved several episodes of dune incursions and damming of drainage systems. Dune advancement often occurred in rapid pulses and the orientation of VLD long axes indicates similar long-term wind directions. The late Holocene episode included partial incursion of new sand, reworking of Late Pleistocene dunes as well as limited redeposition. The modern sand movement only reactivated older dunes and did not lengthen VLDs. This aeolian record fits well with other regional aeolian sections. We suggest that sand supply and storage in Sinai was initiated by the Late Pleistocene exposure of the Nile Delta sands. Late Pleistocene winds, substantially stronger than those usually prevailing since the onset of the Holocene, are suggested to have transported the dune sands across Sinai and into the northwestern Negev. Our results demonstrate the sensitivity of vegetated linear dunes located along the (northern) fringe of the sub-tropical desert belt to climate change (i.e. wind) and sediment supply. (C) 2011 Elsevier Ltd. All rights reserved. |
英文关键词 | Negev Israel Vegetated linear dune Dunefield OSL Late Pleistocene |
类型 | Article |
语种 | 英语 |
国家 | Israel ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000292946800008 |
WOS关键词 | REGENERATIVE-DOSE PROTOCOL ; SAND DUNES ; NILE DELTA ; SOUTHWESTERN KALAHARI ; NORTHEASTERN SINAI ; GLACIAL MAXIMUM ; NORTHERN SINAI ; GREAT-PLAINS ; SEA-LEVEL ; LUMINESCENCE |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | Ben-Gurion University of the Negev |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/170241 |
作者单位 | 1.Ben Gurion Univ Negev, Dept Geog & Environm Dev, IL-84105 Beer Sheva, Israel; 2.Geol Survey Israel, IL-955501 Jerusalem, Israel; 3.Univ Cologne, Inst Geog, D-50923 Cologne, Germany |
推荐引用方式 GB/T 7714 | Roskin, Joel,Porat, Naomi,Tsoar, Haim,et al. Age, origin and climatic controls on vegetated linear dunes in the northwestern Negev Desert (Israel)[J]. Ben-Gurion University of the Negev,2011,30(13-14):1649-1674. |
APA | Roskin, Joel,Porat, Naomi,Tsoar, Haim,Blumberg, Dan G.,&Zander, Anja M..(2011).Age, origin and climatic controls on vegetated linear dunes in the northwestern Negev Desert (Israel).QUATERNARY SCIENCE REVIEWS,30(13-14),1649-1674. |
MLA | Roskin, Joel,et al."Age, origin and climatic controls on vegetated linear dunes in the northwestern Negev Desert (Israel)".QUATERNARY SCIENCE REVIEWS 30.13-14(2011):1649-1674. |
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