A Numerical Study of Circulations Induced by a Dry Salt Lake
A Numerical Study of Circulations Induced by a Dry Salt Lake
复制标题
干盐湖引起的环流的数值研究
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
N. Tapper
中科院分区：
文献类型：
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作者：
W. Physick;N. Tapper
摘要Tapper对一个中等大小（约70平方公里）的干盐湖附近的地表风的观测表明，盐和周围沙表面之间的热传导和土壤热特性的差异可能足以驱动一个中尺度热循环。本文利用一个中尺度数值模式研究了中、大型湖泊（约7000 km ~ 2）产生的扰动。在后一种情况下，澳大利亚内陆大盐湖的典型规模，强烈的水平和垂直切变的扰动被发现在距离湖岸超过200公里的午夜。在干燥和潮湿的土壤条件下，单独的贡献的水循环和土壤性质的差异进行评估。这种环流对区域气候的可能影响进行了讨论，并建议盐湖可能是孤立波在澳大利亚内陆观察到的一个来源。
Abstract Observations of surface winds in the vicinity of a moderate-sized (about 70 km2) dry salt lake by Tapper suggest that differences in albedo and soil thermal properties between the salt and surrounding sand surfaces may be strong enough to drive a mesoscale thermal circulation. In this paper a numerical mesoscale model is used to investigate disturbances generated by moderate and large-sized (about 7000 km2) lakes. In the latter case, a typical size for the great salt lakes of inland Australia, disturbances with strong horizontal and vertical shear are found at a distance of more than 200 km from the lakeshore by midnight. The separate contribution of albedo and soil property differences to the circulation are assessed, under both dry and moist soil conditions. The possible influence of such circulations on regional climate is discussed and it is suggested that salt lakes may be a source for solitary waves observed in the Australian interior.