A quasi-lagrangian diagnostics investigation of rapid cyclogenesis in a polar air system
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Authors
Cook, William A.
Subjects
North Atlantic
Quasi-Langrangian diagnostics
Mass budget
Stability analysis
Vorticity budget
Explosive maritime cyclogenesis
Polar low
Quasi-Langrangian diagnostics
Mass budget
Stability analysis
Vorticity budget
Explosive maritime cyclogenesis
Polar low
Advisors
Wash, Carlyle H.
Date of Issue
1983-09
Date
September 1983
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A synoptic investigation employing quasi-Lagrangian diagnostic techniques was conducted for a North Atlantic Ocean polar flow undergoing a period or rapid cyclogenesis. The polar flow was of relatively small horizontal scale and developed in a region of low static stability and large low-level baroclinity, which is consistent with theoretical studies. Rapid surface pressure falls and vigorous circulation increases correlate well with the observed maxima in low-level inward mass transport and upper-level mass outflow, and are temporarily coincident with the incursion of to forward divergence quadrant of a jet streak into the budget volume. The most rapid increases of absolute vorticity occurred in the 250 to 300 mb layer, and are related to combined contributions of positive vorticity advection and vertical redistribution processes. The dominant forcing of low-level absolute vorticity increases comes primarily from the divergence source term.
Type
Thesis
Description
Series/Report No
Department
Meteorology
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.