The Effect of Surface Heterogeneity on the Temperature–Humidity Correlation and the Relative Transport EfficiencyReport as inadecuate




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Boundary-Layer Meteorology

, Volume 129, Issue 1, pp 99–113

First Online: 16 September 2008Received: 10 July 2007Accepted: 25 August 2008

Abstract

We derive a conceptual model of the flow over heterogeneous terrain consisting of patches with contrasting Bowen ratios. Upward moving eddies are assumed to carry heterogeneous properties, whereas downward moving eddies carry homogeneous properties. This results in a decorrelation of temperature and humidity as the contrast between the patches increases. We show that this model is able to reproduce the relationship developed by Lamaud and Irvine Boundary-Layer Meteorol. 120:87–109, 2006. Some details differ from their expression but are in accordance with data obtained over African savannah. We extend the conceptual model to a combination of any scalars, not necessarily linked through the surface energy balance as is the case for temperature and humidity. To this end we introduce a new parameter that describes the surface heterogeneity in surface fluxes. The results of the current model can be used to predict the discrepancy between similarity relationships for different scalars over heterogeneous terrain.

KeywordsBkowen ratio Surface heterogeneity Surface layer similarity θ–q-correlation Variance method  Download to read the full article text



Author: Arnold F. Moene - Dirk Schüttemeyer

Source: https://link.springer.com/



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