Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products
The identification of acoustically active pressure ridges in the Arctic Ocean represents an important step in the development of a physics based, operational Polar ambient noise model. One method to accomplish this goal is through the use of satellite based remote sensors, specifically synthetic ape...
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ftdtic:ADA351618 2023-05-15T14:51:07+02:00 Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products Speckhahn, Marcus M. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 1998-06 text/html http://www.dtic.mil/docs/citations/ADA351618 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA351618 en eng http://www.dtic.mil/docs/citations/ADA351618 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Physical and Dynamic Oceanography Acoustics *AMBIENT NOISE *UNDERWATER ACOUSTICS *MARINE GEOPHYSICS ALGORITHMS THESES SYNTHETIC APERTURE RADAR METEOROLOGICAL SATELLITES OCEANOGRAPHIC DATA SEA ICE LAND ICE ARCTIC OCEAN RGPS(RADARSAT GEOPHYSICAL PROCESSOR SYSTEM) Text 1998 ftdtic 2016-02-19T23:56:20Z The identification of acoustically active pressure ridges in the Arctic Ocean represents an important step in the development of a physics based, operational Polar ambient noise model. One method to accomplish this goal is through the use of satellite based remote sensors, specifically synthetic aperture radar (SAR). A proof of concept study was conducted that determined that the RADARSAT Geophysical Processor System (RGPS) produces SAR derived sea ice products capable of quantifying large scale ice deformation that may produce significant levels of low frequency ambient noise. This research also identifies the meteorological forcing that causes the sequence of divergent and convergent events in the ice cover, which results in the creation of open water leads and subsequent generation of noisy pressure ridges. Offshore followed by onshore winds near coasts and land fast ice and atmospheric lows/troughs followed by atmospheric highs/ridges or velocity shear in straight isobaric flow result in significant pressure ridge formation. The RGPS ridging algorithm shows that more ridges exist in RGPS cells exhibiting large cell area changes than in those with small area changes, assuming relatively constant cell heights in all cells. The feasibility of using ice divergence fields generated by Fleet Numerical Meteorology and Oceanography Center's (FNMOC's) Polar Ice Prediction System (PIPS) was evaluated. PIPS modeled ice divergence patterns reasonably well, although divergence values in the high Arctic ice cover were underestimated. Text Arctic Arctic Ocean Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Acoustics *AMBIENT NOISE *UNDERWATER ACOUSTICS *MARINE GEOPHYSICS ALGORITHMS THESES SYNTHETIC APERTURE RADAR METEOROLOGICAL SATELLITES OCEANOGRAPHIC DATA SEA ICE LAND ICE ARCTIC OCEAN RGPS(RADARSAT GEOPHYSICAL PROCESSOR SYSTEM) |
spellingShingle |
Physical and Dynamic Oceanography Acoustics *AMBIENT NOISE *UNDERWATER ACOUSTICS *MARINE GEOPHYSICS ALGORITHMS THESES SYNTHETIC APERTURE RADAR METEOROLOGICAL SATELLITES OCEANOGRAPHIC DATA SEA ICE LAND ICE ARCTIC OCEAN RGPS(RADARSAT GEOPHYSICAL PROCESSOR SYSTEM) Speckhahn, Marcus M. Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
topic_facet |
Physical and Dynamic Oceanography Acoustics *AMBIENT NOISE *UNDERWATER ACOUSTICS *MARINE GEOPHYSICS ALGORITHMS THESES SYNTHETIC APERTURE RADAR METEOROLOGICAL SATELLITES OCEANOGRAPHIC DATA SEA ICE LAND ICE ARCTIC OCEAN RGPS(RADARSAT GEOPHYSICAL PROCESSOR SYSTEM) |
description |
The identification of acoustically active pressure ridges in the Arctic Ocean represents an important step in the development of a physics based, operational Polar ambient noise model. One method to accomplish this goal is through the use of satellite based remote sensors, specifically synthetic aperture radar (SAR). A proof of concept study was conducted that determined that the RADARSAT Geophysical Processor System (RGPS) produces SAR derived sea ice products capable of quantifying large scale ice deformation that may produce significant levels of low frequency ambient noise. This research also identifies the meteorological forcing that causes the sequence of divergent and convergent events in the ice cover, which results in the creation of open water leads and subsequent generation of noisy pressure ridges. Offshore followed by onshore winds near coasts and land fast ice and atmospheric lows/troughs followed by atmospheric highs/ridges or velocity shear in straight isobaric flow result in significant pressure ridge formation. The RGPS ridging algorithm shows that more ridges exist in RGPS cells exhibiting large cell area changes than in those with small area changes, assuming relatively constant cell heights in all cells. The feasibility of using ice divergence fields generated by Fleet Numerical Meteorology and Oceanography Center's (FNMOC's) Polar Ice Prediction System (PIPS) was evaluated. PIPS modeled ice divergence patterns reasonably well, although divergence values in the high Arctic ice cover were underestimated. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Speckhahn, Marcus M. |
author_facet |
Speckhahn, Marcus M. |
author_sort |
Speckhahn, Marcus M. |
title |
Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
title_short |
Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
title_full |
Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
title_fullStr |
Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
title_full_unstemmed |
Identification of Acoustically Active Arctic Pressure Ridges Through the Use of RADARSAT Geophysical Processor System (RGPS) Sea Ice Products |
title_sort |
identification of acoustically active arctic pressure ridges through the use of radarsat geophysical processor system (rgps) sea ice products |
publishDate |
1998 |
url |
http://www.dtic.mil/docs/citations/ADA351618 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA351618 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA351618 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766322189152288768 |