TY - CPAPER AU - S.E. Cohn BT - Workshop on Variational Assimilation, with special emphasis on Three-dimensional Aspects, 9-12 November 1992 CY - Shinfield Park, Reading DA - 1992 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 1992 SP - 157 EP - 170 T2 - Workshop on Variational Assimilation, with special emphasis on Three-dimensional Aspects, 9-12 November 1992 TI - Short term dynamics of forecast error covariances ER -