Digital video collected during Johnson-Sea-Link I submersible dive 3111 by Bureau of Ocean Energy Management (BOEM) in the Gulf of Mexico on 1991-09-02 (NCEI Accession 0168444)
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title: Digital video collected during Johnson-Sea-Link I submersible dive 3111 by Bureau of Ocean Energy Management (BOEM) in the Gulf of Mexico on 1991-09-02 (NCEI Accession 0168444)
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abstract: This Archival Information Package (AIP) contains videographic data of ocean floor biology and geology at a suspected hydrocarbon seep site in the Gulf of Mexico, captured on 1991-09-02 from the manned submersible Johnson-Sea-Link I during dive number 3111. The timespan of this AIP is a single day and constitutes video from a single dive. This AIP is part of a dataset of 149 submersible dives from 48 different lease block areas over the course of 15 dive seasons ranging from 1988 to 2002, collected for studies funded by the Minerals Management Service, now Bureau of Ocean Energy Management (BOEM). Seep communities were found in all but four dives, although sparse community development was common. Because BOEM is tasked with protecting sensitive benthic communities from impacts of operational activities on the outer continental shelf and continental slope, locating these communities is an important task. Although use of surface attributes, particularly strength of seabed reflectivity (from 3-D seismic data) has been very successful in identifying areas of hard bottom (seep-related carbonate) and gas-filled sediment, visual evidence is still considered the best and most irrefutable data. The submersible video database will provide a valuable foundation of observational data for cold seep communities on the northern Gulf of Mexico continental slope. The video in the dataset of which this AIP is a part was originally captured on several different analog video formats. To create the digital video files which comprise the entire collection, the analog video was transferred to DVD, extracted as .avi files, and transcoded at a final stage to MPEG-2 files identified with the extension .mpg. The entire dataset comprises 3,533 .mpg clips of duration 5 minutes or less, representing a total of 280 hours of bottom time. In a few cases, the intermediate .avi files have been archived as well. In one dive (JSL_2634), video has been archived in .VOB and .mp4 format.
purpose: To contribute to the valuable foundation of observational data for cold seep communities on the northern Gulf of Mexico continental slope.
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otherConstraints: Cite as: Blythe, Jonathan; Bureau of Ocean Energy Management (2017). Digital video collected during Johnson-Sea-Link I submersible dive 3111 by Bureau of Ocean Energy Management (BOEM) in the Gulf of Mexico on 1991-09-02 (NCEI Accession 0168444). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0168444. Accessed [date].
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title: Digital video collected during 149 submersible dives by Bureau of Ocean Energy Management (BOEM) at suspected hydrocarbon seep sites in the Gulf of Mexico from 1988-07-28 to 2002-06-04.
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supplementalInformation: Since the mid-1980s, the Minerals Management Service, now Bureau of Ocean Energy Management, and other national funding agencies have supported studies of natural hydrocarbon seeps on the continental slope of the northern Gulf of Mexico. A key part of the database generated from these studies is video of the seafloor associated with each site visited, which were taken using research submersibles to observe and sample the sensitive benthic biology and geology of seep sites. These seep communities, found in all but four dives, are at risk from the impacts of operational activities on the outer continental shelf and continental slope. Locating these communities is an important task, and visual evidence is still considered the best and most irrefutable data. These submersible video data contribute to the valuable foundation of observational data for cold seep communities on the northern Gulf of Mexico continental slope.
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
contact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
role: (CI_RoleCode) custodian
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: video camera
type: video camera
description: a camera which makes moving or still images used as the basis for making parameter determinations
platform: (MI_Platform)
identifier: (MD_Identifier)
code: Johnson-Sea-Link I
description: Updated information from ICES for the vessel JOHNSON-SEA-LINK I from US: UNITED STATES. Name : JOHNSON-SEA-LINK I Country(s) : US: UNITED STATES (ISO Country Code) Platform Class : 20: Submersible Commissioned Date : 1971 Decommissioned Date : 2011 Current Length : 7.19 Built : 1971 WOD Code: 11355 Notes : The Johnson-Sea-Link (JSL) I is a manned submersible, owned and operated by Harbor Branch Oceanographic Institution. At 23.6 ft long, 10.9 ft high and 8.3 ft wide, this highly maneuverable submersible can dive to a depth of 3,000 ft and travel at a maximum speed of one knot. Information Sources: - http://oceanexplorer.noaa.gov/technology/subs/sealink/sealink.html Confirmed by NOAA on 2018-08-29 (FY2018). Submitted to ICES 2017-06-01
instrument: (missing)
