BULETINUL INSTITUTULUI POLITEHNIC DIN IAI Publicat

Numerical procedures for data assimilation in air pollution models An overview BY Gabriel Dimitriu and R zvan tef nescu Abstract. We present an overview on several procedures for data assimilation applied to models in atmospheric chemistry, oceanography and air pollution. The data assimilation schemes are applied to models defined by ordinary and partial differential equations. Emphasis is laid on the performance evaluation of an adaptive proper orthogonal de-composition (POD) procedure with respect to the solution obtained with the classical 4D-Var (full model), and POD 4D-Var data assimila-tion, as well as that of two types of low-rank Kalman filters. Numerical simulations are also included