Using the Linearized Observation Operator to Calculate Observation Space Ensemble Perturbations in Ensemble Filters
Abstract Within the National Oceanic and Atmospheric Administration National Art Print Weather Service, the hybrid ensemble‐variational system (Gridpoint Statistical Interpolation, GSI) is run together with the 80‐member ensemble square root filter (EnSRF) operationally for the global forecast data assimilation system.EnSRF uses observation ope