NSIPP Land Assimilation: 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.