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RISAnother Look at the Scale Analysis for Deep Moist Convecton
Publisher: American Meteorological Society
Abstract: In this note, a more rational approach is given to specify the parameters G and B in the scale analysis of Lipps and Hemier. The thermodynamic equation is written in a different form so that a closed expression for B can ...
Numerical Modeling of a Midlatitude Squall Line: Features of the Convection and Vertical Momentum Flux
Publisher: American Meteorological Society
Abstract: A 4-h simulation is carried out for the 22 May 1976 squall line that passed through the mesonetwork of the National Severe Storm Laboratory in central Oklahoma. This squall line was more than 100 km wide, oriented north-south ...
Numerical Modeling of a Line of Towering Cumulus on Day 226 of GATE
Publisher: American Meteorological Society
Abstract: A three-dimensional numerical model with warm rain bulk cloud physics is used to investigate the shallow convection observed on day 226 of GATE. This convection had cloud tops at 3.0 km, cloud bases at 0.4 km and approximately ...
Numerical Simulation of Deep Tropical Convection Associated with Large-Scale Convergence
Publisher: American Meteorological Society
Abstract: A set of four-hour simulations has been carried out to study deep moist convection characteristic of the Global Atmospheric Research Program (GARP) Atlantic Tropical Experiment (GATE). The present model includes warm rain ...
A Scale Analysis of Deep Moist Convection and Some Related Numerical Calculations
Publisher: American Meteorological Society
Abstract: A scale analysis valid for deep moist convection is carried out. The approximate equations of motion are anelastic with the time scale set by the Brunt- Väisälä frequency. A new assumption is that the base state potential ...
Another Look at the Thermodynamic Equation For Deep Convection
Publisher: American Meteorological Society
Abstract: The study considers deep moist convection involving only a liquid-vapor phase change. An alternative form of the classical thermodynamic equation for reversible saturated flow is derived. Four approximate forms of this ...
Middle Atmosphere Simulated with High Vertical and Horizontal Resolution Versions of a GCM: Improvements in the Cold Pole Bias and Generation of a QBO-like Oscillation in the Tropics
Publisher: American Meteorological Society
Abstract: The large-scale circulation in the Geophysical Fluid Dynamics Laboratory ?SKYHI? troposphere?stratosphere?mesosphere finite-difference general circulation model is examined as a function of vertical and horizontal resolution. ...
Spontaneous Stratospheric QBO-like Oscillations Simulated by the GFDL SKYHI General Circulation Model
Publisher: American Meteorological Society
Abstract: The tropical stratospheric mean flow behavior in a series of integrations with high vertical resolution versions of the Geophysical Fluid Dynamics Laboratory (GFDL) ?SKYHI? model is examined. At sufficiently high vertical ...
A Simulation of a Squall Line Using a Nonhydrostatic Cloud Model with a 5-km Horizontal Grid
Publisher: American Meteorological Society
Abstract: A three-dimensional nonhydrostatic cloud model is used to simulate the squall line observed in central Texas on 11 April 1979. The cloud model covers an area 400 ? 400 km2 with a 5-km horizontal resolution and is supplied ...