Abstract: An efficient solution procedure is developed for a nonseparable semigeostrophic Eady problem on a semi-infinite f plane. A model is designed to study the effects of meridionally isolated jets and tropopause morphology on ...

Abstract: The dynamical mechanisms through which stratospheric forcing can influence tropospheric annular modes are explored. A torque is applied to the stratosphere of an idealized general circulation model, and, under some ...

Abstract: The characteristics of ?target? locations of tropospheric wind and temperature identified by a modified version of the ensemble transform Kalman filter (ETKF), in order to reduce 0?7-day forecast errors over North America, ...

Abstract: Summer seasonal simulations for selected years were performed using the NCEP Global Forecast System (GFS) at high (T126L28) and low (T62L28) resolutions, and the NCEP 80-km regional spectral model (RSM) nested in the T62 ...

Abstract: Real-data experiments with an ensemble data assimilation system using the NCEP Global Forecast System model were performed and compared with the NCEP Global Data Assimilation System (GDAS). All observations in the operational ...

Abstract: The National Centers for Environmental Prediction regional spectral model and mesoscale spectral model (NCEP RSM/MSM) use a spectral computation on perturbation. The perturbation is defined as a deviation between RSM/MSM ...