Towards a third intercomparison case for GABLS using Cabauw data
Year: 2008
Type: book
Abstract: GEWEX Atmospheric Boundary Layer Studies (GABLS) was initiated in 2001. It main goal was defined as improving the representation of the boundary layer in regional and global models, based on a proper understanding of the relevant physics (Holtslag, 2003). To achieve this, two intercomparison studies have been performed so far, both focusing on the representation of the stable boundary layer (SBL). The first study covered an academic case with moderate geostrophic forcing and prescribed surface temperature over ice. A parallel intercomparison of LES codes served as a reference to evaluate the results of the participating SCMs. The main conclusion was that operational models utilize higher mixing efficiencies than research models, thus missing the development of the upper inversion and overestimating the surface friction velocity (Cuxart et al., 2006; Beare et al., 2006). The second GABLS case was based on observations from CASES99 (Svensson and Holtslag, 2006). Building upon the first case, it was now aimed to assess the ability of operational and research models to represent the diurnal cycle of the boundary layer. It was concluded that the models produces very different results in all parameters and differed substantially from the observations (Svensson and Holtslag, 2006). A third intercomparison case for SCMs and LES has been set-up, based on observations from the Cabauw measurement site in The Netherlands. The focus of the current case will be on the representation of the decoupling around sunset, the subsequent development of the
Institution: Royal Netherlands Meteorological Institute
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1576219172