Haboobs and instability in the sudan
Haboobs and instability in the sudan
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哈布和苏丹的不稳定
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
J. Farquharson
中科院分区：
文献类型：
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作者：
J. Farquharson
苏丹的沙尘暴，被称为habobs，被证明与雷暴有关。讨论了几个气球，特别是高空风和高空气温，这是通过一系列试点气球的密切顺序观测，在某个场合获得的与气球相关的垂直气流速度的指示。导出了涡流扩散系数的值为108。调查了与苏丹不稳定有关的条件，认为这些条件可能与西南季风和东北贸易之间的不连续有关，其斜率由以下表达式给出：
具有通常意义的符号。在皇家空军的合作下拍摄的一系列照片说明了一些哈勃的情况。
The dust-storms of the Sudan, called haboobs, are shown to be associated with thunder squalls. Several haboobs are discussed with particular reference to upper winds and upper air temperatures, an indication of the speeds of the vertical currents associated with a haboob being obtained on one occasion by means of a series of pilot balloon observations in close sequence. A value of 108 for the coefficient of eddy diffusivity in a haboob is derived. Conditions associated with instability in the Sudan are investigated and it is suggested that they may be referred to a discontinuity between southwest monsoon and northeast trade, the slope of which is given by the expression:
the symbols having the usual-significance. A series of photographs taken with the co-operation of the R.A.F. illustrates the conditions in some of the haboobs.