4.3 Land surface spinup for episodic modeling.

Angevine, Wayne M., Cooperative Institute for Research in Environmental Sciences and National Oceanic and Atmospheric Administration

Soil moisture must be initialized properly if boundary layer structure is to be correctly simulated. I present results of 1-2 month self-spinup with WRF for the BLLAST campaign (France, 2011). The spinup improves the spatial resolution and magnitude of soil moisture in this area of complex terrain. Boundary layer temperature and moisture profiles correspond much better to measurements after spinup. Two LSMs (Noah and PX) behave differently during spinup, but both benefit. Self-spinup is an alternative to a LDAS when highly-resolved forcing datasets are not available.