Accession Number : ADA300033

Title :   Dynamic Adjustment of Mesoscale Convective Lower-Stratospheric Outflows.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Hausman, Scott A.

PDF Url : ADA300033

Report Date : 10 SEP 1995

Pagination or Media Count : 99

Abstract : Recent observational studies of upper-tropospheric and lower-stratospheric winds atop mesoscale convective systems show the development of anticyclonic outflow. We propose that the anticyclone formation can be partially explained by the gradient adjustment that follows the nearly instantaneous vertical redistribution of mass by the convection. With the convection idealized by an impulsive, diabatic mass transfer from the lower troposphere to a layer near the tropopause. The adjustment process is examined using an invertibility principle developed from the quasi-static primitive equations for axisymmetric, inviscid, adiabatic flow on an f-plane in potential radius and entropy coordinates. The invertibility principle is solved as a single, nonlinear, elliptic problem. Solutions show the development of an anticyclone aloft with cold and warm temperature anomalies above and below, respectively. Sensitivity studies indicate that the anticyclone strength is greatest for lower-stratospheric injections at high latitudes including the effects of cloud-top cooling. As the magnitude of the anticyclone increases, the inertial stability of the system is reduced, resulting in a decreased partitioning of the initial available potential energy to the balanced state of the system.

Descriptors :   *ATMOSPHERIC DISTURBANCES, *CONVECTION(ATMOSPHERIC), *STRATOSPHERE, MATHEMATICAL MODELS, ANOMALIES, CLOUDS, LOW TEMPERATURE, PERMEABILITY, WIND, ATMOSPHERIC TEMPERATURE, THESES, TURBULENCE, TURBULENT FLOW, ATMOSPHERIC MOTION, VORTICES, COOLING, WEATHER FORECASTING, VERTICAL ORIENTATION, TROPOSPHERE, HIGH LATITUDES, ENTROPY, TROPOPAUSE, ATMOSPHERIC SOUNDING, ANTICYCLONES, ADIABATIC GAS FLOW.

Subject Categories : Atmospheric Physics
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE