Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation

Observational and modeling studies are conducted to explore the changing physical environment of the western Arctic Ocean and its significance to upper-ocean hydrography and acoustic energy propagation. In-situ observations of temperature and salinity were made as part of the Canada Basin Acoustic P...

Full description

Bibliographic Details
Main Author: DiMaggio, Dominic F.
Other Authors: Maslowski, Wieslaw, Colosi, John, Oceanography
Format: Thesis
Language:unknown
Published: Monterey, California. Naval Postgraduate School 2016
Subjects:
Arctic Ocean
oceanography
acoustics
Canada Basin
climate system model
Arctic
Canada
Munk
canada basin
Online Access:https://hdl.handle.net/10945/51680
id ftnavalpschool:oai:calhoun.nps.edu:10945/51680
record_format openpolar
spelling ftnavalpschool:oai:calhoun.nps.edu:10945/51680 2024-06-09T07:43:26+00:00 Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation DiMaggio, Dominic F. Maslowski, Wieslaw Colosi, John Oceanography 2016-12 application/pdf https://hdl.handle.net/10945/51680 unknown Monterey, California. Naval Postgraduate School https://hdl.handle.net/10945/51680 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. Arctic Ocean oceanography acoustics Canada Basin climate system model Thesis 2016 ftnavalpschool 2024-05-15T01:00:42Z Observational and modeling studies are conducted to explore the changing physical environment of the western Arctic Ocean and its significance to upper-ocean hydrography and acoustic energy propagation. In-situ observations of temperature and salinity were made as part of the Canada Basin Acoustic Propagation Experiment (CANAPE) pilot study in summer 2015. Sound-speed fluctuations due to internal waves and spice were analyzed to describe spatio-temporal variability. Internal-wave frequency spectra show a spectral slope lower than the Garrett-Munk (GM) model, and the energy level is 4% of the standard GM value. Frequency spectra of spice show a form similar to the internal-wave spectra but with a steeper spectral slope. Several global climate models were evaluated against historical and recent hydrographic observations and found to inadequately represent key upper-ocean hydrographic features. The Regional Arctic System Model (RASM) was used to investigate sensitivity of the simulated upper ocean to various configurations and showed that sub-grid scale brine rejection parameterization, appropriately tuned surface momentum coupling, and increased vertical and horizontal resolution improved model simulation. In both observational and model data sets, a near-surface sound channel is present, the significance and variability of which warrant further in-situ investigations and model improvements. Approved for public release; distribution is unlimited. Lieutenant Commander, United States Navy http://archive.org/details/observationsndmo1094551680 Thesis Arctic Arctic Ocean canada basin Naval Postgraduate School: Calhoun Arctic Arctic Ocean Canada Munk ENVELOPE(-95.993,-95.993,55.979,55.979)
institution Open Polar
collection Naval Postgraduate School: Calhoun
op_collection_id ftnavalpschool
language unknown
topic Arctic Ocean
oceanography
acoustics
Canada Basin
climate system model
spellingShingle Arctic Ocean
oceanography
acoustics
Canada Basin
climate system model
DiMaggio, Dominic F.
Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
topic_facet Arctic Ocean
oceanography
acoustics
Canada Basin
climate system model
description Observational and modeling studies are conducted to explore the changing physical environment of the western Arctic Ocean and its significance to upper-ocean hydrography and acoustic energy propagation. In-situ observations of temperature and salinity were made as part of the Canada Basin Acoustic Propagation Experiment (CANAPE) pilot study in summer 2015. Sound-speed fluctuations due to internal waves and spice were analyzed to describe spatio-temporal variability. Internal-wave frequency spectra show a spectral slope lower than the Garrett-Munk (GM) model, and the energy level is 4% of the standard GM value. Frequency spectra of spice show a form similar to the internal-wave spectra but with a steeper spectral slope. Several global climate models were evaluated against historical and recent hydrographic observations and found to inadequately represent key upper-ocean hydrographic features. The Regional Arctic System Model (RASM) was used to investigate sensitivity of the simulated upper ocean to various configurations and showed that sub-grid scale brine rejection parameterization, appropriately tuned surface momentum coupling, and increased vertical and horizontal resolution improved model simulation. In both observational and model data sets, a near-surface sound channel is present, the significance and variability of which warrant further in-situ investigations and model improvements. Approved for public release; distribution is unlimited. Lieutenant Commander, United States Navy http://archive.org/details/observationsndmo1094551680
author2 Maslowski, Wieslaw
Colosi, John
Oceanography
format Thesis
author DiMaggio, Dominic F.
author_facet DiMaggio, Dominic F.
author_sort DiMaggio, Dominic F.
title Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
title_short Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
title_full Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
title_fullStr Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
title_full_unstemmed Observations and modeling of upper ocean hydrography in the western Arctic with implications for acoustic propagation
title_sort observations and modeling of upper ocean hydrography in the western arctic with implications for acoustic propagation
publisher Monterey, California. Naval Postgraduate School
publishDate 2016
url https://hdl.handle.net/10945/51680
long_lat ENVELOPE(-95.993,-95.993,55.979,55.979)
geographic Arctic
Arctic Ocean
Canada
Munk
geographic_facet Arctic
Arctic Ocean
Canada
Munk
genre Arctic
Arctic Ocean
canada basin
genre_facet Arctic
Arctic Ocean
canada basin
op_relation https://hdl.handle.net/10945/51680
op_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.
_version_ 1801372202775347200

Similar Items