Return to search results
EK80 Water Column Sonar Data Collected During DY2104
The Midwater Assessment and Conservation Engineering (MACE) program of NOAA Fisheries, Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT) stock assessment surveys in the Gulf of Alaska (GOA) 1 June to 10 July 2021 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted along the Gulf of Alaska shelf from the Islands of Four Mountains to Yakutat Trough. Survey operations were conducted aboard NOAA Ship Oscar Dyson, a 64 meter fisheries research vessel built in 2003 and equipped for stern trawling and included capabilities to collect acoustic, oceanographic, and biological scientific data. Acoustic data was collected for the survey using a Kongsberg Simrad EK80 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz). Mid-water trawls were conducted using an LFS 1421 mid-water trawl net equipped with a Kongsberg Simrad FS70 trawl sonar. The survey was divided into two segments with the first segment conducted from 1 June to 20 and the second segment conducted 24 June to 10 July with a mid-survey port call in Kodiak. The vessel departed Kodiak, Alaska on 1 June and conducted a calibration of the EK80 system prior to starting survey operations. The survey areas included the Gulf of Alaska shelf from the Islands of Four Mountains to southeast Kodiak Island, the Shumagin Islands, Barnabas Trough, Shelikof Strait, Chiniak Trough, and the Gulf of Alaska shelf from southeast Kodiak Island to Yakutat Trough. A post-survey calibration of the EK80 echosounder was completed prior to arrival in Kodiak, Alaska on July 10.
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 | The Midwater Assessment and Conservation Engineering (MACE) program of NOAA Fisheries, Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT) stock assessment surveys in the Gulf of Alaska (GOA) 1 June to 10 July 2021 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted along the Gulf of Alaska shelf from the Islands of Four Mountains to Yakutat Trough. Survey operations were conducted aboard NOAA Ship Oscar Dyson, a 64 meter fisheries research vessel built in 2003 and equipped for stern trawling and included capabilities to collect acoustic, oceanographic, and biological scientific data. Acoustic data was collected for the survey using a Kongsberg Simrad EK80 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz). Mid-water trawls were conducted using an LFS 1421 mid-water trawl net equipped with a Kongsberg Simrad FS70 trawl sonar. The survey was divided into two segments with the first segment conducted from 1 June to 20 and the second segment conducted 24 June to 10 July with a mid-survey port call in Kodiak. The vessel departed Kodiak, Alaska on 1 June and conducted a calibration of the EK80 system prior to starting survey operations. The survey areas included the Gulf of Alaska shelf from the Islands of Four Mountains to southeast Kodiak Island, the Shumagin Islands, Barnabas Trough, Shelikof Strait, Chiniak Trough, and the Gulf of Alaska shelf from southeast Kodiak Island to Yakutat Trough. A post-survey calibration of the EK80 echosounder was completed prior to arrival in Kodiak, Alaska on July 10. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Water Column Sonar Data Map Viewer",
"mediaType": "placeholder/value",
"description": "Interactive map viewer to allow discovery and access to water column sonar data",
"downloadURL": "https://www.ncei.noaa.gov/maps/water-column-sonar/index.html?surveys=DY2104&instruments=EK80",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "AWS Cloud Storage Bucket",
"mediaType": "placeholder/value",
"description": "AWS Cloud Storage to provide additional public access to water column sonar data through the NOAA Big Data Project",
"downloadURL": "https://registry.opendata.aws/ncei-wcsd-archive/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Water Column Sonar Data Archive Homepage",
"mediaType": "placeholder/value",
"description": "Web page containing information on the water column sonar data archive.",
"downloadURL": "https://www.ngdc.noaa.gov/mgg/wcd/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Global Change Master Directory (GCMD) Keywords",
"mediaType": "placeholder/value",
"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.",
"downloadURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)",
"mediaType": "placeholder/value",
"description": "Publication of Sea Areas is maintained by IHO.",
"downloadURL": "https://iho.int/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Contact Information",
"mediaType": "placeholder/value",
"description": "Information for contacts at NCEI.",
"downloadURL": "https://www.ncei.noaa.gov/contact",
"describedByType": "application/octet-steam"
}
]
|
| identifier | gov.noaa.ncei:DY2104_EK80 |
| issued | 2021-06-01T00:00:00.000+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",
"Gulf of Alaska",
"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 | 2022-01-20T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -140.54708,52.50397,-169.24277,60.24851 |
| temporal | 2021-06-01T00:00:00+00:00/2021-07-10T11:59:59+00:00 |
| title | EK80 Water Column Sonar Data Collected During DY2104 |
