•“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.