Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quaint.2014.10.015 |
Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA | |
Ellwein, Amy L.1; Mahan, Shannon A.2; McFadden, Leslie D.1 | |
通讯作者 | Ellwein, Amy L. |
来源期刊 | QUATERNARY INTERNATIONAL
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ISSN | 1040-6182 |
EISSN | 1873-4553 |
出版年 | 2015 |
卷号 | 362页码:87-107 |
英文摘要 | Detailed geomorphic mapping and analysis of soil-stratigraphy and optically stimulated luminescence (OSL) dating of eolian sand dunes on Black Mesa, Arizona, reveal eolian sediment deposition occurred from 30 to 16 ka, followed by a period of widespread dune stabilization from 12 to 8 ka. Localized reactivation of the previously stabilized dune forms or local changes in sediment supply have occurred in the middle to late Holocene in this region. Cooler, wetter, and more variable climatic conditions during MIS 3 and 2 led to increased channel and floodplain sediment supply. Eolian sediment derived from these sources was transported up to 60 km. Deposition of this material has reduced regional topographic roughness by filling tributary canyon ’traps’ oriented perpendicular to the dominant wind and sediment transport direction. Topographically controlled falling dunes and sand ramps in this region are preserved because of their geomorphic position and provide evidence of the paleoenvironmental state of the fluvial and eolian systems before, during, and immediately after the last glacial maximum on the southern Colorado Plateau. Widely used predictive models of eolian system dynamics are typically based entirely on climatic variables and do not account for landscape complexity and geomorphic history. Climate-only assumptions fail to give accurate predictions of the dynamics of this and many other dune fields. A growing body of work suggests that eolian deposits in wind-driven semiarid climates may be more strongly related to increases in sediment supply than to increases in aridity. (C) 2014 Elsevier Ltd and INQUA. All rights reserved. |
英文关键词 | Climate change Eolian Soil stratigraphy Falling dunes Linear dunes OSL geochronology |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000350998100011 |
WOS关键词 | SOUTHWESTERN UNITED-STATES ; NORTHERN NEW-MEXICO ; LATE PLEISTOCENE ; MOJAVE DESERT ; GREAT-PLAINS ; EOLIAN SAND ; HOLOCENE ; LUMINESCENCE ; VEGETATION ; HISTORY |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | United States Geological Survey |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/189991 |
作者单位 | 1.Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA; 2.US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | Ellwein, Amy L.,Mahan, Shannon A.,McFadden, Leslie D.. Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA[J]. United States Geological Survey,2015,362:87-107. |
APA | Ellwein, Amy L.,Mahan, Shannon A.,&McFadden, Leslie D..(2015).Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA.QUATERNARY INTERNATIONAL,362,87-107. |
MLA | Ellwein, Amy L.,et al."Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA".QUATERNARY INTERNATIONAL 362(2015):87-107. |
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