Sandy deserts of Iceland: an overview
Sandy deserts of Iceland: an overview
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DOI：
10.1006/jare.2000.0680
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发表时间：
2001-03-01
影响因子：
2.7
通讯作者：
Sigurjonsson, H
中科院分区：
文献类型：
--
作者：
Arnalds, O;Gisladottir, FO;Sigurjonsson, H
冰岛有超过20,000公里的沙质沙漠，具有活跃的风沙过程。由于玄武岩的成因，沙区的表面是黑色的，沙子通常以火山玻璃为主。沙子主要来自冰川边缘、冰川沉积和火山喷发，但也有沉积岩。根据沙源的性质和距离的不同，沙子具有各种各样的质地特性。沙区正在蔓延。肥沃和植被丰富的生态系统被肥力和持水能力较低的沙质沙漠所取代。冰岛沙的阈值是用自动传感器和灰尘捕集器确定的。阈值受表面粗糙度和沙子质地的影响。观察到湿沙子在风暴期间移动，粗糙、轻密度的Tephra>；1毫米很容易被风移动。(C)2001年学术出版社。
Iceland has over 20,000 km(2) of sandy deserts with active aeolian processes. The sandy areas have black surfaces due to their basaltic origin, and the sand is often dominated by volcanic glass. The sand originates largely from glacial margins, glacio-fluvial deposits and volcanic eruptions, but also sedimentary rocks. The sand has a wide range of textural properties according to the nature and distance from the sand source.The sandy areas are spreading. Rich and vegetated ecosystems are replaced by sandy deserts with low fertility and water-holding capacity. Threshold values for Icelandic sand were determined with automatic sensors and dust traps. The threshold values are influenced by the surface roughness and the texture of the sand. Wet sand is observed to move during storm events, and coarse, light density tephra >1 mm is easily moved by the wind. (C) 2001 Academic Press.