Abstract: A large ensemble of predictability runs made during the course of a long equilibrium run in a two-level nonlinear quasi-geostrophic model with orography is examined in order to elucidate characteristics contributing to ...

Abstract: Nonlinear responses to fixed and seasonally varying surface temperature anomalies in a two-level hemispheric time-dependent coupled atmosphere-surface mixed layer model are described. Linear stationary models that are ...

Abstract: Lagged average predictions are examined here within the context of an idealized predictability experiment. Lagged predictions contribute to making better forecasts than the forecasts obtained from using only the latest ...

Abstract: A two-level spherical quasi-geostrophic model is formulated for predictability experiments. The stationary external forcing for this model is calculated from observations. Both barotropic and baroclinic forcings are required ...

Abstract: The stationary nonlinear response to perturbation heating is calculated in a highly truncated, two-level baroclinic model. For certain values of the intrinsic parameters and forcing, multiple equilibrium states exist. For ...

Abstract: Stationary equilibrium states induced by orography and zonal beating are calculated in a simple non-linear quasi-geostrophic baroclinic model. For a specific vector wavenumber and for sufficiently large orography, multiple ...

Abstract: Stationary planetary waves are investigated with severely-truncated quasi-geostrophic models extending from the surface to 100 km. For a typical winter zonal-wind profile, it is shown that large amplitude or resonant ...

Abstract: Further results on the airborne mapping of hailswaths with both fixed beam and scanning IR radiometers are described. It was ascertained that the scanning radiometer made a valuable contribution toward the determination ...

Abstract: Forecasts of time averages of 1?10 days in duration by an operational numerical weather prediction model are documented for the global 500 mb height field in spectral space. The error growth of this model is compared to ...

Abstract: National Meteorological Center dynamical extended-range forecasts of daily as well as time means of lower tropospheric thickness (700 mb height minus 1000 mb height) are analyzed in this paper. Daily forecasts show significant ...