Accession Number:
ADA275373
Title:
On the Origins of Low-Level Tornadic Circulations Within the Remnants of Hurricane Andrews
Descriptive Note:
Master's thesis
Corporate Author:
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Personal Author(s):
Report Date:
1993-09-01
Pagination or Media Count:
79.0
Abstract:
A literature review establishes a key characteristic of tornadic hurricane environments to be the highly sheared lowest 1500 m. The thesis proposes that the shear-produced horizontal vorticity is turned vertical mainly via vertical velocities induced by mass convergence in boundary layer wind-shift zones, rather than by buoyant updrafts. A two dimensional mass continuity and convective available potential energy analysis is performed on data from a profiler and acoustic sounder exposed to Hurricane Andrews tornadic remnants. This analysis suggests the presence of a convergence-produced 5 ms updraft at a wind-shift in the thermodynamically stable boundary layer of a tornadic rainband.
Descriptors:
Subject Categories:
- Meteorology