EK60 Water Column Sonar Data Collected During DY1503

Description

Acoustic-Trawl Survey of Walleye Pollock in the Gulf of Alaska (DY1503, EK60). The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Shelikof Strait, Marmot Bay, and Chirikof shelf break areas of the Gulf of Alaska (GOA) during late winter/early spring of 2015 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted 15-31 March (Marmot Bay, 15-16 March; Shelikof Strait 17-23 March; Chirikof shelf break, 23-24 March), starting and ending in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz).

Resources

Name Format Description Link
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 Interactive map viewer to allow discovery and access to water column sonar data https://www.ncei.noaa.gov/maps/water-column-sonar/index.html?surveys=DY1503&instruments=EK60
0 Web page containing information on the water column sonar data archive. https://www.ngdc.noaa.gov/mgg/wcd/
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
33 Publication of Sea Areas is maintained by IHO. http://www.iho-ohi.net/iho_pubs/standard/S-23/S23_1953.pdf
0 AWS Cloud Storage provides additional public access to water column sonar data through the NOAA Big Data Project https://registry.opendata.aws/ncei-wcsd-archive/
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords

Tags

  • water column
  • vertical location
  • acoustic scattering
  • water column mapping system
  • benthic
  • ecosystems
  • nesdis
  • biosphere
  • bathymetry
  • in situ/laboratory instruments
  • oceans
  • national geophysical data center
  • noaa
  • marine ecosystems
  • aquatic sciences
  • gulf of alaska
  • u.s. department of commerce
  • profilers/sounders
  • earth science
  • acoustic sounders
  • national marine fisheries service
  • doc/noaa/nesdis/ngdc
  • bathymetry/seafloor topography
  • aquatic ecosystems
  • doc/noaa/nesdis/ncei
  • fisheries
  • doc/noaa/nmfs
  • pelagic
  • wcms
  • seafloor topography
  • national centers for environmental information
  • ocean acoustics

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