Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores
Also published as: Journal of the Acoustical Society of America 68 (1980): 1376-1390 Seventeen piston cores up to 13 m long were recovered from representative acoustic and lithologic environments of the Hatteras and Nares Abyssal Plains in the western North Atlantic. Compressional-wave velocities (c...
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Woods Hole Oceanographic Institution
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10262 2023-05-15T17:31:35+02:00 Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores Tucholke, Brian E. 1981-06 https://hdl.handle.net/1912/10262 en_US eng Woods Hole Oceanographic Institution WHOI Technical Reports WHOI-81-51 Tucholke, B. E. (1981). Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10262 https://hdl.handle.net/1912/10262 doi:10.1575/1912/10262 Tucholke, B. E. (1981). Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10262 doi:10.1575/1912/10262 Underwater acoustics Marine sediments Technical Report 1981 ftwhoas https://doi.org/10.1575/1912/10262 2022-05-28T23:00:21Z Also published as: Journal of the Acoustical Society of America 68 (1980): 1376-1390 Seventeen piston cores up to 13 m long were recovered from representative acoustic and lithologic environments of the Hatteras and Nares Abyssal Plains in the western North Atlantic. Compressional-wave velocities (corrected to in situ conditions) and bulk physical properties measured on the cores are used to characterize the acoustic framework of these areas. For correlation with conventional seismic data, wholecore averages of properties are a better index to the acoustic nature of abyssal plain sediments than properties of the upper few centimeters of the seafloor because (I) strong changes in lithofacies (and acoustic properties) occur over depth scales of tens of centimeters to meters in the sediment column, and (2) conventional seismic frequencies of 3.5 kHz or less sample these variations to subbottom depths of tens of meters and more. Wholecore properties are a function of the thickness and distribution of high-velocity silt and sand layers in the core; they vary in a complex fashion with proximity to the source of turbidity currents, distance from axial paths of turbidity-current flows, local and regional basin geometry, and seafloor slope. Thus strongly reflective seabed regions with numerous high-velocity layers are not restricted simply to near-source areas nor are weakly reflective seabed regions (clay sediments only) limited to "distal" areas. Whole-core properties show a good qualitative correlation to variations in 3.5-kHz reflection profiles, and 3.5-kHz echo character therefore provides a useful means of mapping general acoustic properties over large regions of abyssal plains. Prepared for the Office of Naval Research under Contracts N00014-75-C-0210 and N00014-79-C-0071; NR 083-004. Report North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Woods Hole, MA |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Underwater acoustics Marine sediments |
spellingShingle |
Underwater acoustics Marine sediments Tucholke, Brian E. Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
topic_facet |
Underwater acoustics Marine sediments |
description |
Also published as: Journal of the Acoustical Society of America 68 (1980): 1376-1390 Seventeen piston cores up to 13 m long were recovered from representative acoustic and lithologic environments of the Hatteras and Nares Abyssal Plains in the western North Atlantic. Compressional-wave velocities (corrected to in situ conditions) and bulk physical properties measured on the cores are used to characterize the acoustic framework of these areas. For correlation with conventional seismic data, wholecore averages of properties are a better index to the acoustic nature of abyssal plain sediments than properties of the upper few centimeters of the seafloor because (I) strong changes in lithofacies (and acoustic properties) occur over depth scales of tens of centimeters to meters in the sediment column, and (2) conventional seismic frequencies of 3.5 kHz or less sample these variations to subbottom depths of tens of meters and more. Wholecore properties are a function of the thickness and distribution of high-velocity silt and sand layers in the core; they vary in a complex fashion with proximity to the source of turbidity currents, distance from axial paths of turbidity-current flows, local and regional basin geometry, and seafloor slope. Thus strongly reflective seabed regions with numerous high-velocity layers are not restricted simply to near-source areas nor are weakly reflective seabed regions (clay sediments only) limited to "distal" areas. Whole-core properties show a good qualitative correlation to variations in 3.5-kHz reflection profiles, and 3.5-kHz echo character therefore provides a useful means of mapping general acoustic properties over large regions of abyssal plains. Prepared for the Office of Naval Research under Contracts N00014-75-C-0210 and N00014-79-C-0071; NR 083-004. |
format |
Report |
author |
Tucholke, Brian E. |
author_facet |
Tucholke, Brian E. |
author_sort |
Tucholke, Brian E. |
title |
Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
title_short |
Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
title_full |
Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
title_fullStr |
Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
title_full_unstemmed |
Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores |
title_sort |
acoustic environment of the hatteras and nares abyssal plains, western north atlantic ocean, determined from velocities and physical properties of sediment cores |
publisher |
Woods Hole Oceanographic Institution |
publishDate |
1981 |
url |
https://hdl.handle.net/1912/10262 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Nares |
geographic_facet |
Nares |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Tucholke, B. E. (1981). Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10262 doi:10.1575/1912/10262 |
op_relation |
WHOI Technical Reports WHOI-81-51 Tucholke, B. E. (1981). Acoustic environment of the Hatteras and Nares Abyssal Plains, western North Atlantic Ocean, determined from velocities and physical properties of sediment cores. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10262 https://hdl.handle.net/1912/10262 doi:10.1575/1912/10262 |
op_doi |
https://doi.org/10.1575/1912/10262 |
op_publisher_place |
Woods Hole, MA |
_version_ |
1766129250863153152 |