Description and validation of the atmosphere–land–surface interaction scheme (ALSIS) with HAPEX and Cabauw data

摘要: Abstract A new land surface parameterization scheme (ALSIS), with emphasis on soil moisture prediction, is described and validated observations from HAPEX-MOBILHY Cabauw. An important feature of the inclusion vertical heterogeneity hydraulic parameters modelling unsaturated flow. The simulated for HAPEX site using a vertically homogeneous has positive bias in upper layers negative deep layers. Taking into account greatly eliminates this discrepancy results an excellent agreement between annual cycles modelled observed profiles. mean top 1.6 m increased 394 mm case to 433 heterogeneous case, consistent 435 observed. improvement simulation resulted improved skill predicting diurnal fluxes intensive observational period (28 May–3 July). monthly averages temperature follow over year, except January when model overestimates latent heat flux due its failure simulating high rates dew fall. deviation are well within estimated errors. daily temperature, generally observations, some times winter period. those However, night-time flux, especially during January.