Ensemble Kalman Filter and 4D-Var Intercomparison with

filter4dIt’s hard to beat the price of this filtered water bottle, available in 20-, 24- and 32-ounce sizes, all priced under $20.Although we haven't tested this bottle, our pros appreciateEnsemble Kalman filteringwas developed as away to assimilate observed data to track the current state in a computational model. In this paper we showthat the ensemble approach makes