EK80 Water Column Sonar Data Collected During BordelonMC20
One overnight survey of the seep was performed in order to determine the flow rate of hydrocarbons in the watercolumn using a vessel mounted broadband echo sounder and ADCP. The echo sounder and ADCP were mounted on a pole on the port side of the Gerry Bordelon. ADCP surveys were performed in order to determine the magnitude and direction of flow in the area and then broadband acoustic surveys were performed. The broadband acoustic suverys were performed in two parts: the across seep surveys and the along seep surveys. The across seep surveys were performed first and were used to determine the position of the seep as it transitted downstream of the source. That position was then used to inform the location of along seep surveys in which the entire seep, from source to surface was visualized.
All times UTC
0120-0136 Preliminary ADCP survey. Track lines are run perpendicular to the nomial direction of flow to the southwest of the seep source (downstream of the seep) and northeast of the source (upstream of the seep). Flow is nominally to the northeast.
0227 - 0652 Across-seep echo sounder surveys. Track lines are run perpendicular to the nomial direction of the flow starting from downstream of the downed platform and moving downstream. Lines were approximately 1 km long with spacing approximately 50 m. Once the seep was no longer detected in the across seep survey lines, the survey was repeated moving back from upstream to downstream.
0704-0838 Along-seep echo sounder surveys. The position of the seep determined in the across-seep survey lines was used to inform the survey lines run in the direction of flow. These lines were used to ensonify the entire seep in a single pass from origin to the surface.
0848-0921 Second ADCP survey.
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 | One overnight survey of the seep was performed in order to determine the flow rate of hydrocarbons in the watercolumn using a vessel mounted broadband echo sounder and ADCP. The echo sounder and ADCP were mounted on a pole on the port side of the Gerry Bordelon. ADCP surveys were performed in order to determine the magnitude and direction of flow in the area and then broadband acoustic surveys were performed. The broadband acoustic suverys were performed in two parts: the across seep surveys and the along seep surveys. The across seep surveys were performed first and were used to determine the position of the seep as it transitted downstream of the source. That position was then used to inform the location of along seep surveys in which the entire seep, from source to surface was visualized. All times UTC 0120-0136 Preliminary ADCP survey. Track lines are run perpendicular to the nomial direction of flow to the southwest of the seep source (downstream of the seep) and northeast of the source (upstream of the seep). Flow is nominally to the northeast. 0227 - 0652 Across-seep echo sounder surveys. Track lines are run perpendicular to the nomial direction of the flow starting from downstream of the downed platform and moving downstream. Lines were approximately 1 km long with spacing approximately 50 m. Once the seep was no longer detected in the across seep survey lines, the survey was repeated moving back from upstream to downstream. 0704-0838 Along-seep echo sounder surveys. The position of the seep determined in the across-seep survey lines was used to inform the survey lines run in the direction of flow. These lines were used to ensonify the entire seep in a single pass from origin to the surface. 0848-0921 Second ADCP survey. |
| 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"
},
{
"@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.ngdc.mgg.wcd:BordelonMC20_EK80 |
| issued | 2017-09-20T00:00:00.000+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 Mexico",
"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 | 2020-10-07T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -88.96406,28.93306,-88.97396,28.94182 |
| temporal | 2017-09-24T04:25:02+00:00/2017-09-24T08:37:55+00:00 |
| title | EK80 Water Column Sonar Data Collected During BordelonMC20 |
