Dunefields of the Southwest Deserts
Dunefields of the Southwest Deserts
复制标题
西南沙漠的沙丘
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
N. Lancaster
中科院分区：
文献类型：
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作者：
N. Lancaster
美国西南部和墨西哥北部邻近地区是北美最干旱的地区，包括大盆地、莫哈韦、科罗拉多州、索诺兰和奇瓦瓦沙漠的部分地区。该地区包含许多小型沙丘场和几个较大的沙丘场，涵盖了从植被稳定到基本上无植被或活跃沙丘场的一系列活动状态。沙丘堆积在古湖盆地的底部和边缘；邻近主要的常年、季节性或短暂溪流以及地下水排放区域。本章对沙丘的发生和特征、沉积物来源和风况进行了区域调查，随后深入讨论了沙丘的特征和选定沙丘场的边界条件，最后评估了过去的气候和环境对沙丘起源和发展的作用。
The southwestern parts of the USA and adjacent areas of northern Mexico are the most arid part of North America, and include the Great Basin, Mojave, Colorado, Sonoran, and parts of the Chihuahuan deserts. The region contains many small and several larger dune fields, spanning a range of states of activity from vegetation-stabilized to largely vegetation-free or active dune fields. Dunes have accumulated on the floors and margins of paleolake basins; adjacent to major perennial, seasonal, or ephemeral streams and in areas of groundwater discharge. This chapter provides a regional survey of dunefield occurrence and characteristics, sediment sources, and wind regimes, followed by in-depth discussion of dunefield characteristics and boundary conditions for selected dune fields, and concludes with an assessment of the role of past climates and environments on dunefield origins and development.