, Volume 150, Issue 3, pp 515-523
Date: 19 Nov 2013

Observational Support for the Stability Dependence of the Bulk Richardson Number Across the Stable Boundary Layer

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Abstract

The bulk Richardson number ( \(Ri_{Bh}\) ; defined over the entire stable boundary layer) is commonly utilized in observational and modelling studies for the estimation of the boundary-layer height. Traditionally, \(Ri_{Bh}\) is assumed to be a quasi-universal constant. Recently, based on large-eddy simulation and wind-tunnel data, a stability-dependent relationship has been proposed for \(Ri_{Bh}\) . In this study, we analyze extensive observational data from several field campaigns and provide further support for this newly proposed relationship.