Intercomparison and Evaluation of MM5 and Meso-NH mesoscale models in the stable boundary layer
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- Bravo, M., Mira, T., Soler, M.R. et al. Boundary-Layer Meteorol (2008) 128: 77. doi:10.1007/s10546-008-9269-y
Atmospheric numerical models depend critically on realistic treatment of the lower boundary conditions. In strongly thermally-stratified conditions, turbulence may be very weak and the models may find it difficult to produce a good forecast near the surface. Under clear skies and for weak synoptic winds the determining factors are the turbulent kinetic energy and surface-layer parameterizations, which can be very different between models. Here, two state-of-the-art mesoscale models (MM5 and Meso-NH) are operated under exactly the same conditions for two different nights over the Duero basin in the Iberian Peninsula: one night with a well-defined synoptic wind and a second with practically no horizontal pressure gradient. The models are inter-compared and checked against available information, and their performances are evaluated.