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Measurements of natural hydrocarbon gas flux in the Coal Oil Point seep field (COP1710, EK80)
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            title:  Measurements of natural hydrocarbon gas flux in the Coal Oil Point seep field (COP1710, EK80)
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                date:  2017-10-26
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                code:  COP1710_EK80
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                  Anchor:  DOI doi:10.25921/1q3m-3689
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                organisationName:  University of California - Santa Barbara
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                        city:  Santa Barbara
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                organisationName:  UNH/CCOM-JHC> Center for Coastal and Ocean Mapping - Joint Hydrographic Center
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        abstract:  On 26 October 2017, acoustic data was collected in tandem with direct, in situ gas flux measurements. Acoustic data was collected using a Simrad ES200-7C split-beam echosounder that was interfaced with an EK80 Wideband Transceiver. The echosounder was operated over a frequency bandwidth of 160-260 kHz. Direct measurements of gas flux were obtained using a bubble catch device (BCD) that was designed to capture gas in an inverted graduated cylinder through a funnel. An underwater camera that was attached to the BCD was used to capture images of the accumulation of gas within the cylinder. The echosounder was pole-mounted to the port side of the R/V Connell, while the BCD was hand deployed from the starboard side of the vessel. A Garmin WAAS-enabled GPS system was interfaced with the EK80 software to provide position of the vessel throughout the survey. Collection of both acoustic data and direct gas flux measurements were obtained at three seep sites located within the Coal Oil Point seep field: Platform Holly, Seep Tent and La Goleta. Data collection was obtained by positioning the vessel in locations of high seepage activity (verified with the acoustic data) and then allowing the vessel to drift over the area until no seepage activity was observed. Both the acoustic data and the direct gas flux measurements were collected simultaneously throughout the survey. The BCD was deployed at a depth of 23 m at La Goleta and Seep Tent and at 15 m at Platform Holly. A total of 20 .MP4 files were obtained with the BCD. A preliminary test run of the BCD was conducted at the La Goleta seep site at 1532 UTC. Following the BCD test, both acoustic data and video images from the BCD were acquired at the La Goleta seep site. At approximately 1930 UTC, data collection at La Goleta was completed and the R/V Connell transited to the Seep Tent seep site. Data collection at Seep Tent commenced at approximately 1956 UTC and was completed at 2116 UTC. A CTD cast was performed after the survey near Seep Tent. A field calibration was done for the ES200-7C split-beam echosounder following the CTD cast with a 28.5 mm Tungsten-Carbide calibration spheres. At 2150 UTC, the R/V Connell arrived at Platform Holly in order to collect both acoustic and BCD measurements. Data collection with the BCD finished at 2244 UTC and a final acoustic survey in the vicinity of Platform Holly was conducted between 2256 UTC and 2357 UTC.
        purpose:  The cruise was conducted to obtain estimates of gas flux in the region using both acoustic and direct capture methods.
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            otherConstraints:  Cite as: Alexandra Padilla, Scott Loranger, Frank Kinnaman, David Valentine, Tom Weber (2019): Water Column Sonar Data Collection (COP1710, EK80). National Centers for Environmental Information, NOAA. doi:10.25921/1q3m-3689 [access date].
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                code:  Mapping the Spatial Distribution of Seepage Activity in the Coal Oil Point seep field
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                    beginPosition:  2017-10-26T15:30:01
                    endPosition:  2017-10-26T23:59:34
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                        country:  USA
                        electronicMailAddress:  wcd.info@noaa.gov
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  Free
                orderingInstructions:  Contact the NCEI Water Column Sonar Data Manager to order data
        transferOptions:  (MD_DigitalTransferOptions)
            onLine:  (CI_OnlineResource)
                linkage: http://maps.ngdc.noaa.gov/viewers/water_column_sonar/
                name:  Water Column Sonar Data Map Viewer
                description:  Interactive map viewer to allow discovery and access to water column sonar data
                function:  (CI_OnLineFunctionCode) search
        transferOptions:  (MD_DigitalTransferOptions)
            onLine:  (CI_OnlineResource)
                linkage: http://www.ngdc.noaa.gov/mgg/wcd
                name:  Water Column Sonar Data Archive Homepage
                description:  Web page containing information on the water column sonar data archive.
                function:  (CI_OnLineFunctionCode) information
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) collectionHardware
            extent:  (EX_Extent)
                description:  East of Sent Tent seep site in the Coal Oil Point seep field
                geographicElement:  (EX_BoundingPolygon)
                    polygon:
                      Point:
                        pos:  -119.88 34.37
                temporalElement:  (EX_TemporalExtent)
                    extent:
                      TimeInstant:
                        timePosition:  2016-09-06
            levelDescription:  (MD_ScopeDescription)
                other:  Instrument calibration information
        lineage:  (LI_Lineage)
            statement:  Uncalibrated w/ calibration data
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) series
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Horizontal Positional Accuracy
            result:  (DQ_ConformanceResult)
                specification: (inapplicable)
                explanation:  Positional accuracy dependent on navigation GPS, ship motion correction, and sound velocity profile accuracy.
                pass:  true
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Vertical Positional Accuracy
            result:  (DQ_ConformanceResult)
                specification: (inapplicable)
                explanation:  Vertical accuracy is dependent on navigation GPS and ship motion corrections.
                pass:  true
        lineage:  (LI_Lineage)
            processStep:  (LI_ProcessStep)
                description:  Package created using WCSD Packager version 11_28_17. The files are read as part of processing but they are not modified by the packaging process. The archived files are the unaltered raw instrument files
                dateTime:
                  DateTime:  2017-10-26T15:30:01
                processor:  (CI_ResponsibleParty)
                    individualName:  Alexandra Padilla
                    organisationName:  UNH/CCOM
                    positionName:  Graduate Student
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:
                        address:  (CI_Address)
                            deliveryPoint:  24 Colovos Road
                            city:  Durham
                            administrativeArea:  New Hampshire
                            postalCode:  03824
                            country:  USA
                            electronicMailAddress:  apadilla@ccom.unh.edu
                    role:  (CI_RoleCode) principalInvestigator
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) series
        lineage:  (LI_Lineage)
            statement:  EK80 raw data files collected at the La Goleta seep site are named incorrectly as "Patch_bubblecatch-D..." and "Patch_acousticline-D...". The times presented in the filenames for both thte EK80 data and video files from the BCD are reported in UTC.
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            citation:  (CI_Citation)
                title:  Simrad EK80 Echosounder
                date: (inapplicable)
                identifier:  (MD_Identifier)
                    code:  EK80
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Simrad - Kongsberg Maritime AS
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  +47 3303 4000 (Norway)
                            facsimile:  +47 3304 2987 (Norway)
                        address:  (CI_Address)
                            deliveryPoint:  P.O. Box 111
                            deliveryPoint:  Strandpromenaden 50
                            city:  Horten
                            postalCode:  3191
                            country:  Norway
                            electronicMailAddress:  contact@simrad.com
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://www.simrad.com/ek80
                            name:  Simrad Ek80 information web page
                            description:  Page contains general information on the Ek80 and has links to details on operation and file formats
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) resourceProvider
            identifier:  (MD_Identifier)
                code:  Simrad EK80
            type:  echosounder
            description:  The Simrad EK80 is the most modern "high end" split beam scientific echo sounder in the fishery scientific market. Based on more than 60 years of research and development in close collaboration with leading marine scientists this wide band echo sounder system has succeeded the famous EK60, which became an international standard for fish stock assessment. The Simrad EK80 can operate a large number of frequencies simultaneously ranging from 10 to 500 kHz. A wide selection of high quality accurate transducers is available.
        operation:  (MI_Operation)
            identifier:  (MD_Identifier)
                code:  COP1710_EK80
            status:  (MD_ProgressCode) completed
            parentOperation: (inapplicable)
        platform:  (MI_Platform)
            citation:  (CI_Citation)
                title:  R/V Connell
                date:  (CI_Date)
                    date:  2019-01-31
                    dateType:  (CI_DateTypeCode) creation
            identifier:  (MD_Identifier)
                code:  Connell
            description:  26-foot Anderson hull with a cabin and twin 150 Hp Evinrude outboard engines. Equipment includes: Furuno GPS and Radar, 2500ft fathometer, VHF marine radio, AIS, EPIRB, compass, deck/running/anchor lighting, 110 VAC x 7A inverter, capstan, and side mounted davit (150 lbs max) with hydraulic pinch wheel. A vertical pole mount is available for mobile sonar and ADCP surveys. The boat can hold up to 30 SCUBA tanks and is capable of cruising at 25 knots with 6 divers and gear. There are two 80 gallon fuel tanks giving the boat an operating range of 320 miles. The dual axle trailer allows the boat to be launched from a range of harbors.
            instrument:  (MI_Instrument)
                citation:  (CI_Citation)
                    title:  Simrad EK80 Echosounder
                    date: (inapplicable)
                    identifier:  (MD_Identifier)
                        code:  EK80
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  Simrad - Kongsberg Maritime AS
                        contactInfo:  (CI_Contact)
                            phone:  (CI_Telephone)
                                voice:  +47 3303 4000 (Norway)
                                facsimile:  +47 3304 2987 (Norway)
                            address:  (CI_Address)
                                deliveryPoint:  P.O. Box 111
                                deliveryPoint:  Strandpromenaden 50
                                city:  Horten
                                postalCode:  3191
                                country:  Norway
                                electronicMailAddress:  contact@simrad.com
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://www.simrad.com/ek80
                                name:  Simrad Ek80 information web page
                                description:  Page contains general information on the Ek80 and has links to details on operation and file formats
                                function:  (CI_OnLineFunctionCode) information
                        role:  (CI_RoleCode) resourceProvider
                identifier:  (MD_Identifier)
                    code:  Simrad EK80
                type:  echosounder
                description:  The Simrad EK80 is the most modern "high end" split beam scientific echo sounder in the fishery scientific market. Based on more than 60 years of research and development in close collaboration with leading marine scientists this wide band echo sounder system has succeeded the famous EK60, which became an international standard for fish stock assessment. The Simrad EK80 can operate a large number of frequencies simultaneously ranging from 10 to 500 kHz. A wide selection of high quality accurate transducers is available.