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.
  • Cite as: Rolling Deck to Repository (R2R) Program (2013): Water Column Sonar Data Collection (AT26-04, EM122). National Centers for Environmental Information, NOAA. doi:10.7284/111176 [access date]
gov.noaa.ngdc.mgg.wcd:AT26-04_EM122
Other Access Online access information not available.
Distribution Formats
  • >Kongsberg/Simrad ME70 raw files (Version: 1)
    • File Specification: Kongsberg/Simrad ME70 raw files are functionally equivalent to Ex60 raw files and contain power and optionally angular position data with each beam identified by an independent transducer channel. See the Simrad ME70 interface specification manual for further information.
Ordering Instructions Contact the NGDC Water Column Sonar Data Manage to order data
Distributor Distributor information not available
Dataset No POCs available for this dataset
Time Period 2013-07-31T22:03:46 to 2013-08-26T11:39:08
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates
N: 46.85795125
S: 46.18900655
E: -124.1409777
W: -126.3831555
Spatial Coverage Map
Documentation links not available.
Publication Dates
  • creation: 2013-07-31
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency Not planned
Purpose Study the thermal environment of the Cascadia Subduction Zone (CSZ) within the NSF GeoPRISM Corridor off the Washington margin
Use Limitations
  • These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
  • Not subject to copyright protection within the United States.
Dataset Citation
  • Cite as: Rolling Deck to Repository (R2R) Program (2013): Water Column Sonar Data Collection (AT26-04, EM122). National Centers for Environmental Information, NOAA. doi:10.7284/111176 [access date]
Custodians
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Resource Providers
  • University-National Oceanographic Laboratory System (UNOLS)
Sponsors
  • University-National Oceanographic Laboratory System (UNOLS)
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • 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
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • 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
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
Place keywords International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
  • North Pacific Ocean
Global Change Master Directory (GCMD) Location Keywords
  • Global
  • Sea Floor
Use Constraints
  • Cite as: Rolling Deck to Repository (R2R) Program (2013): Water Column Sonar Data Collection (AT26-04, EM122). National Centers for Environmental Information, NOAA. doi:10.7284/111176 [access date]
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
  • Resource will be available one year after initial collection.
Fees
  • Free
Lineage information for: series
Processor
Acquisition Information (collection)
Instrument
  • Kongsberg EM122
  • SBE 911plus CTD
  • Kongsberg EM122
  • Ocean Surveyor ADCP
Platform
  • Atlantis (AT)
Operation
  • AT26-04
Last Modified: 2017-05-30
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