Accession Number : ADA300124

Title :   Detection of Summertime Convergence Zones in Central and Eastern North Carolina using the WSR-88D Doppler Radar.

Descriptive Note : Master's thesis,

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

Personal Author(s) : Ray, Charles A.

PDF Url : ADA300124

Report Date : 10 SEP 1995

Pagination or Media Count : 207

Abstract : A study of the North Carolina (NC) Planetary Boundary Layer (PBL) is conducted, using the newly commissioned National Weather Service WSR-88D Doppler Radar as well as conventional surface and GOES satellite data, to detect and to investigate the nature of convergence zones that affect the summer weather in central and eastern NC. Particular emphasis is placed on the use of the radar's "clear air mode" which is much more sensitive than the conventional non-Doppler operational radars (WSR-57 and WSR-74C) used by the National Weather Service (NWS) prior to the implementation of the WSR-88D. This sensitivity allows detection of very weak features and also provides excellent spatial resolution. Boundaries observed include synoptic scale fronts, thunderstorm outflows, sea breezes, horizontal roll convection, thermal/moisture boundaries and boundaries that are identified as "unknown moving" and "unknown stationary." One particularly interesting "unknown stationary" boundary occurs frequently and has been labeled a "Piedmont Trough." Using the new Doppler radar, it has been determined that a significant portion of the afternoon and evening thunderstorm activity occurring in NC during the summertime is influenced by these boundaries, many of which are too weak to detect using conventional radar, and most of which are nearly impossible to find in conventional surface data alone. (MM)

Descriptors :   *DOPPLER RADAR, *CLIMATOLOGY, *SUMMER, *CONVERGENCE ZONES, THERMAL PROPERTIES, SPATIAL DISTRIBUTION, WEATHER, THESES, BOUNDARY LAYER, RADAR IMAGES, TOPOGRAPHY, METEOROLOGICAL RADAR, GEOLOGY, SOILS, DATA ACQUISITION, HORIZONTAL ORIENTATION, TELEMETERING DATA, MOISTURE, NORTH CAROLINA, LOW STRENGTH, DIURNAL VARIATIONS, CONVECTION(ATMOSPHERIC), BRAGG SCATTERING, SYNCHRONOUS SATELLITES, THUNDERSTORMS, FRONTS(METEOROLOGY), TROUGHS, SEA BREEZE.

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE