BRIEF DESCRIPTION OF BARE ESSENTIALS OF SURFACE TRANSFER AND RESULTS FROM SIMULATIONS WITH THE HAPEX-MOBILHY DATA

The Bare Essentials of Surface Transfer (BEST) land surface scheme is briefly described and the key physical parameterisations discussed. Re sults are then presented to illustrate how the model performs, with fo rcing data for HAPEX-MOBILHY, compared to a series of other schemes in the simulation of evaporation and sensible heat. The implications of the models performance, and some indications of the future development of the scheme are provided. The basic version of BEST was found to ov erestimate evaporation for the HAPEX-MOBILHY data, simulating 816 mm y r(-1) compared to a range of 550 to 816 mm yr(-1) for all models. A mo dification to the beta parameterisation reduced the evaporation to 759 mm yr(-1) which, although an improvement, is still probably too high.