Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1307, ME70)

The Midwater Assessment and Conservation Engineering (MACE) program of NOAA's National Marine Fisheries Service, Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Gulf of Alaska (GOA) during late spring and summer of 2013 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey area included the GOA shelf from the Islands of the Four Mountains to Yakutat Bay including many associated bays and troughs at depths between 50 and 1,000 meters (June 8 to August 9, 2013). The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation, and biological sampling capabilities. The primary instrumentation for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz) and a Simrad ME70 multibeam echosounder, with the ME70 trigger synchronized to the EK60 system.

Dataset Citation

Cite as: Alaska Fisheries Science Center (2013): Water Column Sonar Data Collection (DY1307, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5FF3Q9G [access date]

Dataset Identifiers

DY1307_ME70
doi:10.7289/V5FF3Q9G

ISO 19115-2 Metadata

gov.noaa.ngdc.mgg.wcd:DY1307_ME70

XML


Search Data	Water Column Sonar Data Map Viewer (search) Interactive map viewer to allow discovery and access to water column sonar data
Distribution Formats	Kongsberg/Simrad instrument files (.raw or .wcd)(Version:1) File Specification: Kongsberg/Simrad .raw files are generated by ME70, EK60 or ES60 instruments. They contain power and optionally angular position data with each beam/frequency identified by an independent channel. See the Simrad interface specification manual for further information. The .wcd files are generated by Kongsberg EM302 or EM122 instruments. See Kongsberg documentation for more information.
Ordering Instructions	Contact the Water Column Sonar Data Manager to order data
Distributor	Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov
Dataset Principal Investigator	Chris Wilson Supervisory Research Fish Biologist DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center (206) 526-6435 chris.wilson@noaa.gov


Time Period	2013-06-10T06:52:03 to 2013-08-08T00:22:18
Spatial Reference System	urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates	West:-169.292285412 East:-139.752562167 South:52.5463921667 North:60.627727875
Spatial Coverage Map


Documentation links not available.


Publication Dates	creation: 2013-06-10
Dataset Progress Status	Complete - production of the data has been completed
Data Update Frequency	Not planned
Purpose	Acoustic-trawl survey of walleye pollock in the Gulf of Alaska
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: Alaska Fisheries Science Center (2013): Water Column Sonar Data Collection (DY1307, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5FF3Q9G [access date]
Custodians	NOAA National Centers for Environmental Information
Resource Providers	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Points of Contact	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Publishers	NOAA National Centers for Environmental Information NOAA National Centers for Environmental Information


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 DOC/NOAA/NMFS > National Marine Fisheries Service, 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) Gulf of Alaska Global Change Master Directory (GCMD) Location Keywords GEOGRAPHIC REGION > GLOBAL Vertical Location > VERTICAL LOCATION > SEA FLOOR


Use Constraints	Cite as: Alaska Fisheries Science Center (2013): Water Column Sonar Data Collection (DY1307, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5FF3Q9G [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 at or before one year after initial collection.
Fees	Free

Use Constraints

Cite as: Alaska Fisheries Science Center (2013): Water Column Sonar Data Collection (DY1307, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5FF3Q9G [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 at or before one year after initial collection.

Fees

Free

Lineage information for:series
Processor	DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center

Lineage information for:repository
Processing Steps	2015-04-22T00:00:00 -NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.

Acquisition Information (collection)
Instrument	Simrad ME70 Simrad ME70 Simrad EK60 Simrad ES60 Knudsen CHIRP 3260 Sippican XBT/XSV SBE 49 FastCAT SBE 911plus CTD SBE 32 POS/MV 320
Platform	Oscar Dyson (DY)
Operation	DY1307_ME70

Last Modified: 2017-05-30

For questions about the information on this page, please email:wcd.info@noaa.gov