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RISInteraction of a Cumulus Cloud Ensemble with the Large-Scale Environment. Part III: Semi-Prognostic Test of the Arakawa-Schubert Cumulus Parameterization
Publisher: American Meteorological Society
Abstract: The verification of the Arakawa and Schubert (1974) cumulus parameterization is continued using a semi-prognostic approach. Observed data from Phase III of GATE are used to provide estimates of the large-scale forcing of ...
Interaction of a Cumulus Cloud Ensemble with the Large-Scale Environment. Part II
Publisher: American Meteorological Society
Abstract: The closure assumption of the Arakawa-Schubert (1974) cumulus parameterization takes the form of a balance between the generation of moist convective instability by large-scale processes and its destruction by clouds. This ...
Vertical Velocity Structures in an Axisymmetric, Nonhydrostatic Tropical Cyclone Model
Publisher: American Meteorological Society
Abstract: A statistical analysis of several experiments with different microphysical parameterizations in an axisymmetric, nonhydrostatic tropical cyclone model illustrates the impact of icc-phase microphysics on model vertical ...
The Environment of Hurricane Debby (1982). Part I: Winds
Publisher: American Meteorological Society
Abstract: A three-dimensional, nested analysis of wind fields in the environment of Hurricane Debby (1982) has been completed. The basic analysis tool uses a two-dimensional least-squares fitting algorithm combined with a derivative ...
Comparisons of VAS and Omega Dropwindsonde Thermodynamic Data in the Environment of Hurricane Debby (1982)
Publisher: American Meteorological Society
Abstract: Synoptic-wale thermodynamic fields in the environment of Hurricane Debby (1982) determined from two sets of VAS soundings (VAS1, VAS2) are compared with those obtained from in-situ data (INS). VAS1 sounding were derived ...
The Environment of Hurricane Debby (1982). Part II: Thermodynamic Fields
Publisher: American Meteorological Society
Abstract: A three-dimensional analysis of temperature and relative humidity in the environment of Hurricane Debby (1982) has been completed. Observations from Omega dropwindsondes (ODWs) within 1000 km of the storm have been combined ...
The Impact of Dropwindsonde Data on GFDL Hurricane Model Forecasts Using Global Analyses
Publisher: American Meteorological Society
Abstract: The National Centers for Environmental Prediction (NCEP) and the Hurricane Research Division (HRD) of NOAA have collaborated to postprocess Omega dropwindsonde (ODW) data into the NCEP operational global analysis system ...
Interaction of a Cumulus Cloud Ensemble with the Large-Scale Environment. Part IV: The Discrete Model
Publisher: American Meteorological Society
Abstract: An application of the Arakawa-Schubert (1974) cumulus parameterization to a prognostic model of the large-scale atmospheric circulations is presented. The cloud subensemble thermodynamical properties are determined from ...
Improvement of the NCEP Global Model over the Tropics: An Evaluation of Model Performance during the 1995 Hurricane Season
Publisher: American Meteorological Society
Abstract: An evaluation of the performance of the National Centers for Environmental Prediction Medium-Range Forecast Model was made for the large-scale tropical forecasts and hurricane track forecasts during the 1995 hurricane ...
Role of a Parameterized Ice-Phase Microphysics in an Axisymmetric, Nonhydrostatic Tropical Cyclone Model
Publisher: American Meteorological Society
Abstract: Results of an axisymmetric, nonhydrostatic hurricane model are analyzed with emphasis on the role of a parameterized ice-phase microphysics Inclusion of ice processes produces dramatic differences in the structure and ...