EM122 Water Column Sonar Data Collected During AT26-04
Thermal Structure of the Cascadia Subduction Zone on the Washington Margin (AT26-04, EM122). We propose to conduct a comprehensive study of the thermal environment of the Cascadia Subduction Zone (CSZ) within the NSF GeoPRISM Corridor off the Washington margin. The primary goal of this study is to determine the temperature structure of Juan de Fuca basement and overlying accretionary prism sediments that comprise the CSZ deformation zone with a transect of systematic heat flow and fluid flux profiles off the Washington Coast. Temperature is a primary controlling factor of many subduction zone processes, particularly at active margins that are subject to large magnitude, megathrust earthquakes as the CSZ offshore WA, and a comprehensive heat flow study of the Cascadia Corridor is a fundamental parameter required by the Scientific Plan of the GeoPRISM Program. Compilation of existing data demonstrate that the segment of the CSZ off-shore WA is dramatically under-measured, with only sparse heat flow stations made during programs focused on other scientific goals. We are proposing to acquire a systematic profile of heat flow and fluid flux measurements along a corridor of the accretionary prism on the Washington margin at 47N, from west of the deformation front on the abyssal plain to just below the shelf edge at 500 m depth in order to make the first quantitative estimates of the thermal structure of the 'locked zone' of the Cascadia megathrust. To obtain an accurate estimate of conductive heat flux from the challenging environment of the accretionary prism, we plan redundant methods to obtain both thermal and fluid flux measurements along a 2.5 D profile of the margin at a single latitude. In this profile we would use thermal blankets suitable for impenetrable sub-stratum, continuous fluid flow meters, multi-core deployments for sediment pore water chemistry and thermal gradient measurements, and Jason-II heat flow probes.
Resources
5 resources available
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Water Column Sonar Data Map Viewer
TEXT/HTML -
Water Column Sonar Data Archive Homepage
TEXT/HTML -
Global Change Master Directory (GCMD) Keywords
TEXT/HTML -
International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
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NCEI Contact Information
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{ "fn": "NOAA National Centers for Environmental Information", "@type": "vcard:Contact", "hasEmail": "mailto:ncei.info@noaa.gov" } |
| describedByType | application/octet-steam |
| description | Thermal Structure of the Cascadia Subduction Zone on the Washington Margin (AT26-04, EM122). We propose to conduct a comprehensive study of the thermal environment of the Cascadia Subduction Zone (CSZ) within the NSF GeoPRISM Corridor off the Washington margin. The primary goal of this study is to determine the temperature structure of Juan de Fuca basement and overlying accretionary prism sediments that comprise the CSZ deformation zone with a transect of systematic heat flow and fluid flux profiles off the Washington Coast. Temperature is a primary controlling factor of many subduction zone processes, particularly at active margins that are subject to large magnitude, megathrust earthquakes as the CSZ offshore WA, and a comprehensive heat flow study of the Cascadia Corridor is a fundamental parameter required by the Scientific Plan of the GeoPRISM Program. Compilation of existing data demonstrate that the segment of the CSZ off-shore WA is dramatically under-measured, with only sparse heat flow stations made during programs focused on other scientific goals. We are proposing to acquire a systematic profile of heat flow and fluid flux measurements along a corridor of the accretionary prism on the Washington margin at 47N, from west of the deformation front on the abyssal plain to just below the shelf edge at 500 m depth in order to make the first quantitative estimates of the thermal structure of the 'locked zone' of the Cascadia megathrust. To obtain an accurate estimate of conductive heat flux from the challenging environment of the accretionary prism, we plan redundant methods to obtain both thermal and fluid flux measurements along a 2.5 D profile of the margin at a single latitude. In this profile we would use thermal blankets suitable for impenetrable sub-stratum, continuous fluid flow meters, multi-core deployments for sediment pore water chemistry and thermal gradient measurements, and Jason-II heat flow probes. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Water Column Sonar Data Map Viewer", "accessURL": "http://maps.ngdc.noaa.gov/viewers/water_column_sonar/", "mediaType": "text/html", "description": "Interactive map viewer to allow discovery and access to water column sonar data", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Water Column Sonar Data Archive Homepage", "accessURL": "https://www.ngdc.noaa.gov/mgg/wcd/", "mediaType": "text/html", "description": "Web page containing information on the water column sonar data archive.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Global Change Master Directory (GCMD) Keywords", "accessURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords", "mediaType": "text/html", "description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)", "accessURL": "https://iho.int/", "mediaType": "text/html", "description": "Publication of Sea Areas is maintained by IHO.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Contact Information", "accessURL": "https://www.ncei.noaa.gov/contact", "mediaType": "text/html", "description": "Information for contacts at NCEI.", "describedByType": "application/octet-stream" } ] |
| identifier | https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Sonar_Water_Column/iso/xml/AT26-04_EM122.xml |
| issued | 2013-07-31T00:00:00.000+00:00 |
| keyword |
[ "Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering", "Earth Science > Oceans > Aquatic Sciences > Fisheries", "Earth Science > Oceans > Ocean Acoustics", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic", "Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems", "Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry", "Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography", "North Pacific Ocean", "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce", "Vertical Location > Water Column", "In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System" ] |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2014-01-03T00:00:00.000+00:00 |
| publisher |
{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" } |
| rights | otherRestrictions, otherRestrictions |
| spatial | -124.1409777,46.18900655,-126.3831555,46.85795125 |
| temporal | 2013-07-31T22:03:46+00:00/2013-08-26T11:39:08+00:00 |
| title | EM122 Water Column Sonar Data Collected During AT26-04 |
