Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2012GM001214 |
Recent Seasonal Variations in Arid Landscape Cover and Aeolian Sand Mobility, Navajo Nation, Southwestern United States | |
Draut, Amy E.1; Redsteer, Margaret Hiza2; Amoroso, Lee2 | |
通讯作者 | Draut, Amy E. |
会议名称 | American-Geophysical-Union (AGU) Chapman Conference on Climates, Past Landscapes, and Civilizations |
会议日期 | MAR, 2011 |
会议地点 | Santa Fe, MEXICO |
英文摘要 | The socioeconomic impacts of climate change pose problems not only in developing countries but also to residents of arid lands in the United States among marginalized societies with limited economic means. In the Navajo Nation, warming temperatures and recent drought have increased aeolian sediment mobility such that large, migrating sand dunes affect grazing lands, housing, and road access. Dust derived from this region also affects albedo and longevity of the Rocky Mountains snowpack, located downwind. We present initial results from a study that monitors sand transport and vegetation within a 0.2 km(2) site in the Navajo lands, measuring the effects of drought on landscape stability since 2009. Sand mobility decreased substantially as 1 year with near-normal monsoon rainfall (2010) somewhat abated a decade-long drought, temporarily doubling vegetation cover. Vegetation that grew during 2010, with adequate rain, died off rapidly during dry conditions in 2011. Short-term increases in rainfall that promote annual, but not perennial, plant growth will not improve landscape stability in the long term. Climate projections suggest that a warmer, drier climate and potentially enhanced sediment supply from ephemeral washes will further increase aeolian sand transport and dune activity, worsening the present challenges to people living in this region. Connections among climate, vegetation, and aeolian sediment erodibility in this region are highly relevant to other areas of the world with similar environmental problems. |
来源出版物 | CLIMATES, LANDSCAPES, AND CIVILIZATIONS |
ISSN | 0065-8448 |
出版年 | 2012 |
卷号 | 198 |
页码 | 51-60 |
EISBN | 978-0-87590-488-7 |
出版者 | AMER GEOPHYSICAL UNION |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S ; CPCI-SSH |
WOS记录号 | WOS:000334687700006 |
WOS关键词 | CLIMATE-CHANGE ; WIND-TUNNEL ; DUNE SAND ; MODEL ; ENVIRONMENTS ; VEGETATION ; TRANSPORT ; EXAMPLES ; DYNAMICS ; IMPACTS |
WOS类目 | Anthropology ; Archaeology ; Geosciences, Multidisciplinary |
WOS研究方向 | Anthropology ; Archaeology ; Geology |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/301032 |
作者单位 | 1.US Geol Survey, Santa Cruz, CA 95060 USA; 2.US Geol Survey, Flagstaff, AZ USA |
推荐引用方式 GB/T 7714 | Draut, Amy E.,Redsteer, Margaret Hiza,Amoroso, Lee. Recent Seasonal Variations in Arid Landscape Cover and Aeolian Sand Mobility, Navajo Nation, Southwestern United States[C]:AMER GEOPHYSICAL UNION,2012:51-60. |
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