Abstract
The hypothesis, that the magnitude of the Froude number can represent the flow type around an obstacle was examined at several different topographical shapes in dust-laden environments. It was found that in most cases this hypothesis was true. Average of 16 May months AOT data extracted from the MODIS Terra satellite has shown that in case of Froude number less than one, the AOT isolines tend to follow the topographical contours of the mountain peak (the obstacle) along with a minimum AOT near the peak.
Highlights
Open AccessThis paper is an extension of [1] Alpert and Barkan (2015) which investigated the flow types, in this case employing TOMS dust as a tracer, around and above topographical obstacles
Though the topography is complicated, the AOT isolines follow in good proximity the height contours
The assumption, based on the Froude number, that the behavior of the flow can be used as an open air hydrodynamic and thermodynamic laboratory, was reaffirmed approximately for different topographical features
Summary
This paper is an extension of [1] Alpert and Barkan (2015) which investigated the flow types, in this case employing TOMS dust as a tracer, around and above topographical obstacles. The focus is not just on the flow around an ear-circular shaped obstacle, i.e., the Gebel Mara, Sudan, N. The Terra MODIS data for all May months, during 2000-2015, 16 years altogether, were employed. The monthly average, not the daily data was used, in order to reduce the noise. The scientific background was described in the previous paper
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