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Convective Parameterization in a Quasi-Geostrophic Diagnostic Model of Fronts
Publisher: American Meteorological Society
Abstract: The quasi-geostrophic ?-equation including a convective parameterization is solved for an idealized frontal structure. A sloping cold front is specified by a simple analytical form for the Q-vector representing constant ...
Diagnosis of Balanced Vortex Structure Using Potential Vorticity
Publisher: American Meteorological Society
Abstract: A useful set of equations with which to describe tropical cyclones in gradient wind balance involves using the total flow for advection. Transformation of these equations to angular momentum coordinates has advantages ...
Use of Ducting Theory in an Observed Case of Gravity Waves
Publisher: American Meteorological Society
Abstract: This paper attempts to explain the properties of a gravity wave event observed on Mallorca (Balearic islands) using an array of microbarographs. The waves propagated coherently for a relatively long distance with a speed ...
Consequences of the Geostrophic Momentum Approximation on Barotropic Instability
Publisher: American Meteorological Society
Abstract: A subsynoptic instability with dominant barotropic signature has been found to be a possible mechanism for the development of frontal waves. Linear semigeostrophic calculations of the growth rate of waves developing along ...
Parcel Theory in Three Dimensions and the Calculation of SCAPE
Publisher: American Meteorological Society
Abstract: Slantwise convective available potential energy (SCAPE) is a measure of the degree to which the atmosphere is unstable to conditional symmetric instability (CSI). It has, until now, been defined by parcel theory in which ...
Frontogenesis in the Presence of Small Stability to Slantwise Convection
Publisher: American Meteorological Society
Abstract: It is often observed that, despite the existence of near neutrality to slantwise convection, rainbands and snowbands can persist for long periods with narrow intense updrafts producing large quantities of precipitation in ...
The Parcel Method in a Baroclinic Atmosphere
Publisher: American Meteorological Society
Abstract: The parcel method of investigating the susceptibility of the atmosphere to particular disturbances involves postulating parcel displacements in an undisturbed environment and deducing the likelihood of such a displacement ...
Interactions of Tropopause Depressions with an Ex–Tropical Cyclone and Sensitivity of Forecasts to Analysis Errors
Publisher: American Meteorological Society
Abstract: This paper focuses on the coupling between an ex?tropical cyclone and two preexisting mesoscale tropopause depressions (TDs). The TDs approached the cyclone from widely separated sources after becoming cut off from different ...
THORPEX Research and the Science of Prediction
Publisher: American Meteorological Society
Abstract: he Observing System Research and Predictability Experiment (THORPEX) was a 10-yr, international research program organized by the World Meteorological Organization?s World Weather Research Program. THORPEX was motivated ...