Patterned ground is ubiquitous in Arctic and alpine areas. To improve understanding of this phenomenon, we developed extensive field instrumentation that has been recording principal soil properties over the past four years. The resulting data constitute the first quantitative year-round records of important seasonal process such as freezing, thawing, frost heaving, and settling in the active layer in a sorted circle area. The data provide unprecedented insight into the long-term ...
Rain simulation experiments conducted in the western Mojave Desert, California, indicate that the use of off-road vehicles on arid lands increases the amount and frequency of water runoff and sheet-wash erosion. Detailed experiments with controlled motorcycle traffic over a loamy sand typical of this region, reveal that these responses are due to a decrease in soil porosity, infiltration capacity, effectiveness of surface stabilizers and hydraulic resistance to overland flow. These ...
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