DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
ADA514364
Title:
Analysis of a Non-Developing Tropical Circulation System During the Tropical Cyclone Structure (TCS08) Field Experiment
Descriptive Note:
Master's thesis
Corporate Author:
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Report Date:
2009-12-01
Pagination or Media Count:
92.0
Abstract:
The objective of this research is to analyze the non-developing Tropical Circulation System TCS025 utilizing data collected during the Tropical Cyclone Structure 2008 TCS-08 and The Observing System Research and Predictability Experiment THORPEX Pacific Asian Regional Campaigns T-PARC. Aircraft dropwindsondes, special ELDORA radar observations, and analyzed ECMWF model fields are used to define the three-dimensional structure at key times during the lifecycle of TCS025. Two TCS025-related Mesoscale Convective Systems MCSs were examined with observations from Air Force WC- 130J and Navy Research Lab P-3 flights. On 28 August 2008, dropwindsonde and ELDORA wind fields identified a cyclonic circulation associated with an MCS MCS-G. However, the upper-level and lower-level circulations were disconnected around the 850 hPa level. The upper-level circulation propagated southward with the MCS-G convection while the lower-level circulation progressed poleward. On 29 August 2008, dropwindsonde and ELDORA wind fields identified a broad cyclonic circulation associated with another MCS MCS-H. However, the center of circulation was northwest of MCS-H convection. It appears mid- and upper-level circulations associated with the MCS convection propagated southward with the convection while the low-level cyclonic circulation, under influence of the low-level background flow, progressed poleward. Without continued vertical coupling, TCS025 did not become a tropical depression.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
