A Synthetic Study of
Near-Surface Soil Moisture Assimilation for North America

Why Assimilate Soil Moisture?

What is Data Assimilation ?

The Kalman-Filter

The Catchment-Based LSM

Numerical Experiments

Soil Moisture: January 30

Soil Moisture: July 31

Soil Moisture: December 29

“Errors” in Assimilated Moisture: 1

“Errors” in Assimilated Moisture: 2

Monthly Evapotranspiration

Monthly Runoff

Conclusions