A numerical study of the forcing mechanisms of the Leeuwin current system

Approved for public release, distribution is unlimited === To investigate the role of wind forcing, bottom topography and thermohaline gradients in the Leeuwin Current System (LCS), several experiments are conducted with a sigma coordinate primitive equation model on a beta-plane. Results show that...

Full description

Bibliographic Details
Main Author: Kennedy, Richard A., Jr.
Other Authors: Batteen, Mary L.
Published: Monterey, California. Naval Postgraduate School 2012
Online Access:http://hdl.handle.net/10945/4998
id ndltd-nps.edu-oai-calhoun.nps.edu-10945-4998
record_format oai_dc
spelling ndltd-nps.edu-oai-calhoun.nps.edu-10945-49982015-02-06T03:56:11Z A numerical study of the forcing mechanisms of the Leeuwin current system Kennedy, Richard A., Jr. Batteen, Mary L. Collins, Curtis A. Department of Oceanography Approved for public release, distribution is unlimited To investigate the role of wind forcing, bottom topography and thermohaline gradients in the Leeuwin Current System (LCS), several experiments are conducted with a sigma coordinate primitive equation model on a beta-plane. Results show that the LCS is an anomalous eastern boundary current (EBC) that generates a coastal poleward current, an equatorward undercurrent, and highly energetic mesoscale features such as meanders and eddies. Thermohaline gradient effects were shown to be the primary mechanism in the generation of a poleward (equatorward) current (undercurrent), eddies and meanders in the LCS. Inshore of the poleward surface flow, next to the coast, wind forcing plays an important role in generating an equatorward coastal current and upwelling. Bottom topography is shown to be an important mechanism for intensifying and trapping currents near the coast, weakening subsurface currents and intensifying eddies off capes. Overall, the results of the study compare well with available observations in the LCS. 2012-03-14T17:43:51Z 2012-03-14T17:43:51Z 2002-09 Thesis http://hdl.handle.net/10945/4998 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted. Monterey, California. Naval Postgraduate School
collection NDLTD
sources NDLTD
description Approved for public release, distribution is unlimited === To investigate the role of wind forcing, bottom topography and thermohaline gradients in the Leeuwin Current System (LCS), several experiments are conducted with a sigma coordinate primitive equation model on a beta-plane. Results show that the LCS is an anomalous eastern boundary current (EBC) that generates a coastal poleward current, an equatorward undercurrent, and highly energetic mesoscale features such as meanders and eddies. Thermohaline gradient effects were shown to be the primary mechanism in the generation of a poleward (equatorward) current (undercurrent), eddies and meanders in the LCS. Inshore of the poleward surface flow, next to the coast, wind forcing plays an important role in generating an equatorward coastal current and upwelling. Bottom topography is shown to be an important mechanism for intensifying and trapping currents near the coast, weakening subsurface currents and intensifying eddies off capes. Overall, the results of the study compare well with available observations in the LCS.
author2 Batteen, Mary L.
author_facet Batteen, Mary L.
Kennedy, Richard A., Jr.
author Kennedy, Richard A., Jr.
spellingShingle Kennedy, Richard A., Jr.
A numerical study of the forcing mechanisms of the Leeuwin current system
author_sort Kennedy, Richard A., Jr.
title A numerical study of the forcing mechanisms of the Leeuwin current system
title_short A numerical study of the forcing mechanisms of the Leeuwin current system
title_full A numerical study of the forcing mechanisms of the Leeuwin current system
title_fullStr A numerical study of the forcing mechanisms of the Leeuwin current system
title_full_unstemmed A numerical study of the forcing mechanisms of the Leeuwin current system
title_sort numerical study of the forcing mechanisms of the leeuwin current system
publisher Monterey, California. Naval Postgraduate School
publishDate 2012
url http://hdl.handle.net/10945/4998
work_keys_str_mv AT kennedyrichardajr anumericalstudyoftheforcingmechanismsoftheleeuwincurrentsystem
AT kennedyrichardajr numericalstudyoftheforcingmechanismsoftheleeuwincurrentsystem
_version_ 1716730493362241536