Jeffrey
Walker USRA/NASA-GSFC
Numerical Experiments
•“Truth” Data Set
•Spin-up catchment-based LSM for 1987 using ISLSCP
forcing data.
•Run the simulation for 1987 using ISLSCP forcing data
and output surface moisture data as
“observations”.
•Open Loop Data Set
•Degrade the soil moisture prognostic variable spin-up
states to make the catchments artificially
wet.
•Run the simulation for 1987 using ISLSCP forcing data.
•Assimilated Data Set
•Degrade the soil moisture prognostic variable spin-up
states to make the catchments artificially
wet (as for the open loop).
•Run the simulation for 1987 using ISLSCP forcing data.
•Assimilate the surface “observations” once every 3 days
using the Kalman-filter.