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Water Column Sonar Data Collection (SH1610, ME70)
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.
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 | 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. |
| 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": "http://maps.ngdc.noaa.gov/viewers/water_column_sonar/",
"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"
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{
"@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"
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{
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"title": "NCEI Contact Information",
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|
| identifier | gov.noaa.ngdc.mgg.wcd:SH1610_ME70 |
| issued | 2016-06-30T00:00:00.000+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",
"North Pacific Ocean",
"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/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",
"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 | 2017-08-13T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -122.37731,40.94772,-127.22234,49.28341 |
| temporal | 2016-06-30T15:31:26+00:00/2016-08-14T18:40:29+00:00 |
| title | Water Column Sonar Data Collection (SH1610, ME70) |
