Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea
Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution August 1993 Travel time perturbations of adiabatic normal modes due to an internal tide and internal mode field in the Baren...
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Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
1993
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5539 2023-05-15T15:38:12+02:00 Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea Ray, Douglas S. Barents Sea 1993-08 application/pdf https://hdl.handle.net/1912/5539 en_US eng Massachusetts Institute of Technology and Woods Hole Oceanographic Institution WHOI Theses https://hdl.handle.net/1912/5539 doi:10.1575/1912/5539 doi:10.1575/1912/5539 Internal waves Ocean circulation Acoustic surface waves Thesis 1993 ftwhoas https://doi.org/10.1575/1912/5539 2022-05-28T22:58:43Z Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution August 1993 Travel time perturbations of adiabatic normal modes due to an internal tide and internal mode field in the Barents Sea are examined. A formalism for the travel time perturbation due to a change in sound speed is presented. Internal tide and internal wave amplitude spectra are calculated from Brancker temperature loggers which were deployed on moorings in the Barents Sea during the August 1992 Barents Sea Polar Front Experiment. In particular, the first three internal wave mode amplitudes are estimated from the four Brancker temperature loggers on the southwest mooring of the array. Modal perturbations in acoustic pulse travel time and the travel time covariance are calculated and compared for consistency to a simple ray model. These perturbations are small for the modal arrivals that the vertical acoustic array which was deployed is expected to resolve. The third internal wave mode has the largest impact on the acoustic arrivals, per unit amplitude, but the first internal wave mode dominates the scattering due to having a much larger amplitude overall. Thesis Barents Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Barents Sea Woods Hole, MA |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Internal waves Ocean circulation Acoustic surface waves |
spellingShingle |
Internal waves Ocean circulation Acoustic surface waves Ray, Douglas S. Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
topic_facet |
Internal waves Ocean circulation Acoustic surface waves |
description |
Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution August 1993 Travel time perturbations of adiabatic normal modes due to an internal tide and internal mode field in the Barents Sea are examined. A formalism for the travel time perturbation due to a change in sound speed is presented. Internal tide and internal wave amplitude spectra are calculated from Brancker temperature loggers which were deployed on moorings in the Barents Sea during the August 1992 Barents Sea Polar Front Experiment. In particular, the first three internal wave mode amplitudes are estimated from the four Brancker temperature loggers on the southwest mooring of the array. Modal perturbations in acoustic pulse travel time and the travel time covariance are calculated and compared for consistency to a simple ray model. These perturbations are small for the modal arrivals that the vertical acoustic array which was deployed is expected to resolve. The third internal wave mode has the largest impact on the acoustic arrivals, per unit amplitude, but the first internal wave mode dominates the scattering due to having a much larger amplitude overall. |
format |
Thesis |
author |
Ray, Douglas S. |
author_facet |
Ray, Douglas S. |
author_sort |
Ray, Douglas S. |
title |
Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
title_short |
Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
title_full |
Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
title_fullStr |
Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
title_full_unstemmed |
Acoustic travel time perturbations due to an internal tide and internal wave field in the Barents Sea |
title_sort |
acoustic travel time perturbations due to an internal tide and internal wave field in the barents sea |
publisher |
Massachusetts Institute of Technology and Woods Hole Oceanographic Institution |
publishDate |
1993 |
url |
https://hdl.handle.net/1912/5539 |
op_coverage |
Barents Sea |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
doi:10.1575/1912/5539 |
op_relation |
WHOI Theses https://hdl.handle.net/1912/5539 doi:10.1575/1912/5539 |
op_doi |
https://doi.org/10.1575/1912/5539 |
op_publisher_place |
Woods Hole, MA |
_version_ |
1766368949765668864 |