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    • ME70 Water Column Sonar Data Collected During SH1610

    Metadata Updated: September 17, 2021

    1. Use paired midwater trawls to evaluate potential selectivity of Pacific hake age/size classes by different codend liners (Standard AWT 32 mm versus 7 mm used by DFO on their Cantrawl) in the Aleutian wing trawl 24/20 (AWT). Midwater trawling for this research will take place on all three survey legs.
    2. Use paired trawls to evaluate performance of net with and without the marine mammal excluder installed.
    3. Test a larger kite on the AWT for stability and ease of use with headrope sensors.
    4. Continuously sample multi-frequency acoustic backscatter data using the ship’s Simrad EK60, EK80, and ME70 scientific echo sounder systems to estimate the distributions and abundances of hake, myctophids, gelatinous zooplankton, and krill.
    5. Conduct research using the EK80 to distinguish between hake, myctophids, and rockfish. Compare EK80 backscatter signature with that of the EK60.
    6. Optically observe fish behavior inside daytime trawls using a video or stereo camera and lights mounted inside the net. Test stereo camera system for quantifying fish species and length.
    7. Collect a variety of other acoustic, biological, and oceanographic samples to characterize the biotic and abiotic environments and predator-prey interactions of the surveyed species.
    8. Investigate near-field calibration techniques.
    9. Use night operations time to conduct hydrographic measurements with a CTD. A NWFSC dissolved O2 sensor will also be mounted on the CTD.
    10. Sample profiles of temperature and salinity using an underway conductivitytemperature-depth (CTD) system during daytime operations.
    11. Continuously sample air temperature, barometric pressure, and wind speed and direction using the ship’s integrated weather station.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date September 14, 2021
    Metadata Created Date November 12, 2020
    Metadata Updated Date September 17, 2021
    Reference Date(s) June 30, 2016 (creation), August 13, 2017 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NGDC MGG Sonar Water Column

    Other Data Resources

    Additional Metadata

    Resource Type Series
    Metadata Date September 14, 2021
    Metadata Created Date November 12, 2020
    Metadata Updated Date September 17, 2021
    Reference Date(s) June 30, 2016 (creation), August 13, 2017 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ngdc.mgg.wcd:SH1610_ME70
    Access Constraints Cite as: Northwest Fisheries Science Center. 2016. Water Column Sonar Data Collection (SH1610, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5XD1000 [access date], 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., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Resource may not be available for up to one year after initial collection.
    Bbox East Long -122.37731
    Bbox North Lat 49.28341
    Bbox South Lat 40.94772
    Bbox West Long -127.22234
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id b3e4b140-dcfa-4ce2-a03c-d3fdf12d7133
    Harvest Source Id ab8b0290-e4db-4a00-89f2-4e427c2054b2
    Harvest Source Title NGDC MGG Sonar Water Column
    Licence 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.
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-127.22234, 40.94772], [-122.37731, 40.94772], [-122.37731, 49.28341], [-127.22234, 49.28341], [-127.22234, 40.94772]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2016-06-30T15:31:26
    Temporal Extent End 2016-08-14T18:40:29

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