You are here

Circulation in the Lau Basin and Havre Trough

Title: Circulation in the Lau Basin and Havre Trough.
Name(s): Simons, Elizabeth G. (Elizabeth Gabrielle), author
Speer, Kevin G., professor directing dissertation
Cogan, Nicholas G., university representative
Dewar, William K., committee member
Sura, Philip, committee member
Florida State University, degree granting institution
College of Arts and Sciences, degree granting college
Program in Geophysical Fluid Dynamics, degree granting department
Type of Resource: text
Genre: Text
Doctoral Thesis
Issuance: monographic
Date Issued: 2018
Publisher: Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource (115 pages)
Language(s): English
Abstract/Description: The ridge systems that frame the Lau Basin and Havre Trough, located east of Fiji and north of New Zealand, separating a large counterclockwise gyre at the surface into two smaller gyres at depth. A strong deep western boundary current (DWBC) has been observed flowing northward, following the Tonga and Kermadec Trench systems, transporting bottom water to the North Pacific. Though circulation has been described to some degree around the Lau Basin and the Havre Trough, these sub-basins have largely been ignored, presumed to act as a barrier to flow and separating the western South Pacific from the eastern South Pacific. An analysis of float data from several sources as well as traditional ship-board hydrographic data reveal a DWBC within the Lau Basin and Havre Trough that is fed by westward flowing jets from breaks within the ridge system. A simple analytical model predicts the large-scale dynamics observed in the basin, and indicates that the topographic structure of the ridge modulates the flow patterns. Sources of water into the Lau Basin and Havre Trough indicate intermediate water sources from the eastern South Pacific, while deep water sources originate to the west. This leads to a revised view of the role of the Lau Basin and Havre Trough with respect to circulation in the South Pacific.
Identifier: 2018_Sp_Simons_fsu_0071E_14508 (IID)
Submitted Note: A Dissertation submitted to the Geophysical Fluid Dynamics Institute in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Degree Awarded: Spring Semester 2018.
Date of Defense: March 30, 2018.
Bibliography Note: Includes bibliographical references.
Advisory Committee: Kevin Speer, Professor Directing Dissertation; Nick Cogan, University Representative; Bill Dewar, Committee Member; Philip Sura, Committee Member.
Subject(s): Oceanography
Persistent Link to This Record:
Host Institution: FSU

Choose the citation style.
Simons, E. G. (E. G. ). (2018). Circulation in the Lau Basin and Havre Trough. Retrieved from