干旱区生态环境知识资源中心(Arid): Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA

Arid

DOI	10.3390/geosciences8050146
	Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA
	Ellwein, Amy L.; McFadden, Leslie D.; McAuliffe, Joseph A.; Mahan, Shannon A.
通讯作者	Ellwein, AL
来源期刊	GEOSCIENCES
EISSN	2076-3263
出版年	2018
卷号	8 期号:5
英文摘要	The Moenkopi dune field in northeastern Arizona covers roughly 1250 km(2), but most of the field is inactive. Dune deposits on the Moenkopi Plateau (MP) have remained inactive throughout the Holocene despite periods of elevated aridity or historical reductions of vegetation cover by livestock grazing. We argue that this inactivity is not because of any diminishment of driving forces in the aeolian system (e.g., insufficient winds), but rather because of increased cohesion due to soil development that enhances resistance to wind erosion. Abundant aeolian sediments were supplied to the Black Mesa region by the Little Colorado River and its tributaries during the late Pleistocene (MIS 2 and 3), which enabled the development of climbing dunes and transport of sand over the Adeii Eechii Cliffs and onto the MP. These deposits (Qe1) stabilized during the Pleistocene/Holocene climatic transition (-12-7.5 ka) because of reduced sediment supply and high dust flux which resulted in rapid soil formation. Erosion of climbing dunes/sand ramps from the Adeii Eechii Cliffs eliminated delivery of large quantities of new sand to the MP during the mid to late Holocene. Soil development within the Qe1 mantle increased sediment cohesion and prevented widespread aeolian reactivation during the Holocene, despite the occurrence of conditions (wind speed, climate, etc.) under which dune reactivation would be expected. Drylands comprise roughly 40% of the land cover of earth and climate models predict their expansion. Pedogenic stability is not commonly considered in climate-based models used to predict aeolian activity. To improve predictions of future dune activity in drylands, the degree of soil development in aeolian deposits should be considered when evaluating sediment availability in aeolian systems.
英文关键词	dune field morphodynamics rapid soil development Moenkopi Plateau sand sheets linear dunes soil stratigraphy soil geomorphology buried soils optically stimulated luminescence radiation dosimetery
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000435194000001
WOS关键词	GREAT-PLAINS ; CLIMATIC CHANGES ; MOJAVE DESERT ; DUNE MOBILITY ; UNITED-STATES ; EOLIAN DUST ; BLACK-MESA ; LUMINESCENCE ; SAND ; ARIZONA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	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/2XILL650/332830
作者单位	[Ellwein, Amy L.] Rocky Mt Biol Labs, Crested Butte, CO 81224 USA; [McFadden, Leslie D.] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA; [McAuliffe, Joseph A.] Desert Bot Garden, Phoenix, AZ 85008 USA; [Mahan, Shannon A.] US Geol Survey, Denver Fed Ctr, MS 974, Denver, CO 80225 USA
推荐引用方式 GB/T 7714	Ellwein, Amy L.,McFadden, Leslie D.,McAuliffe, Joseph A.,et al. Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA[J]. United States Geological Survey,2018,8(5).
APA	Ellwein, Amy L.,McFadden, Leslie D.,McAuliffe, Joseph A.,&Mahan, Shannon A..(2018).Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA.GEOSCIENCES,8(5).
MLA	Ellwein, Amy L.,et al."Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA".GEOSCIENCES 8.5(2018).