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Anomaly General Circulation Models
Publisher: American Meteorological Society
Abstract: Anomally models based on a spectral general circulation model (GCM) are formulated and applied to study of low-frequency atmospheric variability in the extratropics, and long-range forecasting research. A steady linear ...
Effects of an Equatorial “Wall” on an Atmospheric Model
Publisher: American Meteorological Society
Abstract: The effect of an artificial lateral boundary (the wall) at the Equator on a simulated atmospheric circulation was studied numerically. By comparing the solutions of two 30-day integrations of a global model with and without ...
Feasibility of Seasonal Forecasts Inferred from Multiple GCM Simulations
Publisher: American Meteorological Society
Abstract: Assuming that SST provides the major lower boundary forcing for the atmosphere, observed SSTs are prescribed for an ensemble of atmospheric general circulation model (GCM) simulations. The ensemble consists of 9 ?decadal? ...
Subgrid Scale Physics in 1-Month Forecasts. Part II: Systematic Error and Blocking Forecasts
Publisher: American Meteorological Society
Abstract: The capability of blocking prediction is investigated with respect to four models of different subgrid scale parameterization packages, which were described in Part I. In order to assess the capability, blocking indices ...
Subgrid Scale Physics in 1-Month Forecasts. Part I: Experiment with Four Parameterization Packages
Publisher: American Meteorological Society
Abstract: Four packages of subgrid scale (SGS) physics parameterization are tested by including them in a general circulation model and by applying the four models to 1-month forecasts. The four models are formulated by accumulatively ...
One-Way Nested Grid Models: The Interface Conditions and the Numerical Accuracy
Publisher: American Meteorological Society
Abstract: Tests of several interface conditions in a one-way nested grid model were undertaken, where the ratio of grid size for the coarse mesh in the large domain and the fine mesh in the small domain was 4:1. The interface values ...
A General Circulation Model for Upper Ocean Simulation
Publisher: American Meteorological Society
Abstract: A general circulation model (GCM) of the ocean that emphasizes the simulation of the upper ocean has been developed. This emphasis is in keeping with its future intent, that of an air-sea coupled model. The basic model is ...
Cumulative Results of Extended Forecast Experiment. III: Precipitation
Publisher: American Meteorological Society
Abstract: A diagnostic analysis and an appraisal of the precipitation calculation by the GFDL (Geophysical Fluid Dynamics Laboratory) 1967 version prediction model are presented, using two-week forecasts of 12 January and 12 July ...
Four-Dimensional Analysis Experiment During the Gate Period Part II
Publisher: American Meteorological Society
Abstract: The GATE analysis was repeated utilizing the full GATE data set in the delayed mode and a revised four-dimensional analysis procedure. The resulting maps wore compared with maps of other author. Based on the new analysis, ...
One-Month Forecast Experiments—without Anomaly Boundary Forcings
Publisher: American Meteorological Society
Abstract: A series of one-month forecasts were carried out for eight January cases, using a particular prediction model and prescribing climatological sea-surface temperature as the boundary condition. Each forecast is a stochastic ...