An externalised surface scheme like SURFEX allows computationally cheap offline runs. This is a major advantage for surface assimilation techniques such as the extended Kalman filter (EKF). where the offline runs allow a cheaper numerical estimation of the observation operator Jacobian. In the recent past an EKF has been developed within SURFEX for the initialisation of soil water con... https://www.itsmajorlook.com/top-deal-Dallas-Cowboys-logo-Fan-Decals-3-75-x-5-p32366-top-mega/