Surface Heterogeneity and Vertical Structure of the Boundary Layer

By Larry Mahrt. Boundary-layer Meteorology, 2000

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Influence of surface heterogeneity on scalar dissimilarity in the roughness sublayer (2007, background): “The RSL is characterized by a local flow that is influenced by individual surface roughness elements (Raupach et al. 1996; Mahrt 2000 ), and empirical evidence suggests that the RSL extends up to 1.5 to 3 times the canopy height, h (Cellier and Brunet 1991; Kaimal and Finnigan 1994; Rotach 1999) an”
Analysis of second‐order moments in surface layer turbulence in an Alpine valley (2009, methodology): “Nevertheless, being based on local balance, it can also be extended to terrains weakly departing from the ideal condition of being indefinitely flat and homogeneous (Andreas et al., 1998; Mahrt, 2000; Lyons et al., 2001; Zhang et al., 2001; Rotach et al., 2008; Tampieri et al., 2009).”
The Persistent Challenge of Surface Heterogeneity in Boundary-Layer Meteorology: A Review (2020, background): “If these patches have (micro) scales ∼ 50 m, the height at which the surface heterogeneity effect is homogenized or blended out is low (∼ 20 m) and as a result the mean flow is horizontally homogeneous over most of the depth of the atmospheric surface layer (ASL) (Mahrt 2000; Bou-Zeid et al. 2004).”