The NCAR Land Surface Model (LSM), a component of the NCAR Community Climate Model, has yet to be formally examined within PILPS. Results of LSM within the Valdai PILPS 2(d) battery will be presented. LSM's stomatal resistance formulation, based on photosynthetic rates rather than those drivers found its cohorts' more "utilitarian" stomatal schemes, will be examined with respect to the parameterization's settings for C3 and C4 grasses.
LSM is also being incorporated within a coupled atmosphere, surface and groundwater hydrology model. PILPS provides an excellent opportunity to provide an operational benchmark between a model's "default" configuration and that of a modified coupling. Comparisons between the Advanced Regional Prediction System with its default surface scheme and with LSM will be presented. Also to be presented is LSM with the PILPS 2(d) parameters coupled with a groundwater model, the USGS MODFLOW model.