Accession Number : ADA185609

Title :   Observations of a Midlatitude Squall Line Boundary Layer Wake.

Descriptive Note : Master's thesis,

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

Personal Author(s) : Hamilton, Paul

PDF Url : ADA185609

Report Date : Jan 1987

Pagination or Media Count : 105

Abstract : Mesoscale pressure perturbations frequently observed with mesoscale convective systems (MCS) are examined with special emphasis on the characteristics, structure, lifecycle and driving mechanism of the wake depression found in the wake region of the convection. A severe squall line which traversed the OK PRE-STORM surface and upper air mesonet-work on 10-11 June 1985 is the focus of this observational study. Extensive surface, upper air and digitized radar data collected during the OK PRE-STORM field experiment were used for analysis. Various mesoanalyses of this squall line at the surface and aloft have allowed for intensive examination of three pressure features observed with this squall line: the mesohigh wake depression and pre-squall mesolow. Their relationship to and interaction with other meteorological parameters such as precipitation, temperature, potential temperature and moisture are explored. Furthermore, the mesoscale system-relative jets observed with midlatitude squall lines are examined for their possible influence on the pressure field.

Descriptors :   *CONVECTION(ATMOSPHERIC), *WAKE, DRIVES, METEOROLOGICAL PHENOMENA, MOISTURE, ATMOSPHERIC PRECIPITATION, PRESSURE DISTRIBUTION, STORMS, ATMOSPHERIC TEMPERATURE, UPPER ATMOSPHERE, BOUNDARY LAYER, BAROMETRIC PRESSURE, JET FLOW, THESES

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE