Impact of increased aridity on sand dune activity in the Canadian Prairies
作者： S.A Wolfe
关键词: Period (geology) 、 Geology 、 Sand dune stabilization 、 Central region 、 Evapotranspiration 、 Arid 、 Hydrology 、 Spatial distribution
摘要: Abstract The possible impact of increased aridity on sand dune activity the Canadian Prairies is evaluated by comparing mobility indices for period 1961–1990 to those 1988 drought year. 30-year mean indices, with P:PE ratios ranging from 0·50 0·90, indicate dunes be presently either inactive or having only crests active. Using a scenario in which conditions were prolonged, region predicted increase most arid localities active accompanied vegetated interdune areas. central prairies would have semi-arid rather than sub-humid climate, as low 0·30. Despite aridity, likely remain parabolic.
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