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Cyclogenesis Near the Adélie Coast and Influence of the Low-level Wind Regime

by Steinhoff, Daniel Frederick

Abstract (Summary)
Cyclone activity in the Adélie Coast region is analyzed using three years (2003-2005) of data from the Antarctic Mesoscale Prediction System (AMPS). "Type I" cyclone development occurs off-shore between 145°E-150°E on the leading edge of a dissipating cyclone to the west near 120°E, primarily as a result of barrier wind formation and favorable upper level support. "Type II" cyclone development occurs adjacent to the coast near 155°E. Type II development exhibits a barotropic structure, and leeside cyclogenesis is common, with near-surface cyclonic vorticity produced by interaction of katabatic winds with the ambient environment. In both categories of development, the low-level wind regime, especially the Adélie Land katabatic wind regime, is found to be a key component of cyclogenesis in the Adélie Coast region, contrary to inferences made in several earlier studies that effects are confined to mesoscale cyclone development.
Bibliographical Information:

Advisor:

School:The Ohio State University

School Location:USA - Ohio

Source Type:Master's Thesis

Keywords:antarctica cyclones mesoscale katabatic winds barrier

ISBN:

Date of Publication:01/01/2008

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