Further Plan
§Local Ensemble Transform Kalman Filter (LETKF)
qCouple model with LETKF
qUse model coupled with VEGAS  (nature run) to create simulated observations of  surface fluxes and concentrations, as well as regular atmospheric observations
qPerform observing system simulation experiments (OSSEs) to the forecast model of CO2 , SPEEDY, using simulated observations from the coupled model
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From now, IÕm going to adapt Local Ensemble Transform Kalman Filter to the coupled model.  IÕll use the coupled model to create simulated observations of surface fluxes and concentrations, as well as regular atmospheric observations.  Also, IÕll perform observing system simulation experiments to SPEEDY, using simulated observation from the coupled model.