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ADCP, CTD, water and sediment chemistry, and underway sensor data collected aboard R/V Endeavor cruise EN505 in the Gulf of Mexico from 2012-04-11 to 2012-04-24 (NCEI Accession 0194300)


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            title:  ADCP, CTD, water and sediment chemistry, and underway sensor data collected aboard R/V Endeavor cruise EN505 in the Gulf of Mexico from 2012-04-11 to 2012-04-24 (NCEI Accession 0194300)
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                date:  2019-09-09
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/4846 Bipana Sigdel
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/2186 Harte Research Institute for Gulf of Mexico Studies (HRI)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5597 Laura Lapham
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1480 University of Southern Mississippi, Department of Marine Science
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        abstract:  This dataset contains ADCP, CTD, water and sediment chemistry, and other underway sensor data collected aboard R/V Endeavor cruise EN505 in the Gulf of Mexico from 2012-04-11 to 2012-04-24. The CTD profiles were done at 4 locations using Sea-Bird SBE 911plus from 2012-04-11 to 2012-04-14 and include seawater conductivity, temperature, pressure, salinity, density, oxygen concentration, sound velocity, dissolved oxygen, beam attenuation, light transmission, fluorescence, surface irradiance, and depth parameters. The current velocity data was measured by a hull-mounted mounted Acoustic Doppler Current Profiler (ADCP) and other underway sensor data was measured with a Sea-Bird SBE 21 (tsg), Sea-Bird SBE 45 (tsg) and underway sensors/navigational instruments. All data records include sampling time (UTC), position (Latitude, Longitude) and water depth. In addition, the dataset also includes the water column and sediment chemistry data and the measurements include the concentration of dissolved nutrients, dissolved gases, total particulate nitrogen (TPN), total particulate carbon (TPN), particulate organic carbon (POC), and particulate inorganic carbon acquired from 8 CTD casts and 6 multiple corer drops. The objective of this cruise was to study the impact of the Deepwater Horizon (DWH) blowout on the water column and benthic communities of the Gulf of Mexico and compare these impacts to naturally occurring oil and gas seeps. These data are also available at Rolling Deck to Repository (R2R) under cruise https://doi.org/10.7284/902570.
        purpose:  The purpose of this cruise was to study the impact of the Deepwater Horizon blowout on the water column and benthic communities of the Gulf of Mexico and compare these impacts to naturally occurring oil and gas seeps.
        credit:  Related Funding Agency: Gulf of Mexico Research Initiative (GoMRI)
        credit:  Related Funding Agency: Gulf of Mexico Research Initiative Information & Data Cooperative
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                        title:  International DOI Foundation (IDF)
                        date: (inapplicable)
                    code: https://doi.org/10.1016/j.dsr2.2016.04.010
                citedResponsibleParty:  (CI_ResponsibleParty)
                    positionName: (unknown)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://doi.org/10.1016/j.dsr2.2016.04.010
                            protocol:  HTTPS
                            name: https://doi.org/10.1016/j.dsr2.2016.04.010
                            description:  journal article
                            function:  (CI_OnLineFunctionCode) information
                    role: (unknown)
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Cardona, Yuley
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Bracco, Annalisa
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Villareal, Tracy A.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Subramaniam, Ajit
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Weber, Sarah C.
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Montoya, Joseph P.
                    role:  (CI_RoleCode) author
                presentationForm:  (CI_PresentationFormCode) documentDigital
                series:  (CI_Series)
                    name:  Deep Sea Research Part II: Topical Studies in Oceanography
                    issueIdentification:  129
                otherCitationDetails:  ISBN/ISSN 0967-0645, pp. 20-30
            associationType:  (DS_AssociationTypeCode) crossReference
            initiativeType:  (DS_InitiativeTypeCode) sciencePaper
        language:
          LanguageCode:  eng; USA
        characterSet:  (MD_CharacterSetCode) utf8
        topicCategory:  (MD_TopicCategoryCode) environment
        topicCategory:  (MD_TopicCategoryCode) oceans
        topicCategory:  (MD_TopicCategoryCode) climatologyMeteorologyAtmosphere
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -90.5895
                eastBoundLongitude:  -87.42629
                southBoundLatitude:  27.2111
                northBoundLatitude:  30.35717
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  2012-04-11
                    endPosition:  2012-04-24
        supplementalInformation:  Submission Package ID: UNH2R4 CTD data: Time (Seconds since 1970-01-01 00:00:00); latitude (degrees_north); longitude (degrees-east); sea_water_pressure (dbar); depth (m);depth 2 (m); sea_water_temperature (deg C); sea_water_temperature 2 (deg C); sea_water_electrical_conductivity (S/m); sea_water_electrical_conductivity 2(S/m); sea_water_salinity (psu); sea_water_salinity 2(psu); Oxygen raw SBE 43 (volt); dissolved_Oxygen_concentration (umol/kg); dissolved_Oxygen_concentration 2 (umol/kg); dissolved_Oxygen_concentration 3 (umol/kg); dissolved_Oxygen_concentration 4 (umol/kg); sea_water_density_sigma_theta (kg/m^3); sea_water_density_sigma_theta 2(kg/m^3);volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water (1/m); light transmission(%); light_irradiance_surface_spar (W/m^2); Fluorescence (mg/m^3); average-speed_of_sound_in_sea_water (m/s); average-speed_of_sound_in_sea_water 2 (m/s); altimeter (m); potential_Temperature (deg ); potential_Temperature 2 (deg ); Descent Rate (m/s); geopotential_height_anomaly (J/kg). ADCP data: Time [decimal days], latitude [degrees north], longitude [degrees east], depth bins [meters], zonal Velocity Component [u, m/s], meridional Velocity Component [v, m/s], signal Amplitude [counts], percentage good [%], internal instrument temperature [degrees Celsius], ship zonal velocity [m/s], ship meridional Velocity [m/s], ship heading[degrees]. Underway sensor suite data: Time (Seconds since 1970-01-01 00:00:00), Trimble Latitude (degrees north), Trimble Longitude(degrees east), Trimble COG (deg), Trimble SOG (knots), Air Temperature (degrees C), Relative Humidity (%), Barometric Pressure (mBar), sea surface temperature at 5m depth( deg C), sea surface temperature at 1m depth (deg C), PIR longwave radiation (W/m^2), PSP shortwave radiation (W/m^2), Precipitation current hour (mm), Precipitation Last hour (mm), Precipitation Current 24 hours (mm), Precipitation Last 24 hours (mm), Precipitation Rate (mm/hr), Turner Flourometer raw, Flourometer Volts, Ship Heading(deg), Ship Pitch (deg) Ship Roll (deg), Gyro Heading (deg), KnudsenEcho water depth (m), Speed log (knots), Relative Wind Direction (degrees), Relative Wind Speed (Knots), true wind speed direction (degrees), true wind speed (knots), Thermosalinograph Salinity (PSU), Thermosalinograph Temperature (deg C), Thermosalinograph Conductivity (S/m), Thermosalinograph Sound Velocity (m/s). Water column and sediment chemistry data: Location (BOEM lease block); Station; Event; Collection type; Lat (Latitude, degrees decimal minutes); Long (Longitude, degrees decimal minutes) Date (dd/mm/yy); Time (Local, L); Time (Zulu, Z); Depth (meters below surface, m); pH; Dissolved Oxygen (O2, mg/L); Salinity (psu); Ammonium (NH4, uM); Nitrite (NO2, uM); Nitrate + nitrite (NOx, uM); Nitrate (NO3, uM); Dissolved Inorganic Nitrogen (DIN, uM); Total Dissolved Nitrogen (TDN, uM); Dissolved Organic Nitrogen (DON, uM); Dissolved Phosphate (PO4, uM); Total Dissolved Phosphorus (TDp, uM); Dissolved Organic Phosphorus (DON, uM); Dissolved Inorganic Nitrogen to Phosphorus ratio (DIN:DIP, molar ratio); Dissolved Organic Nitrogen to Phosphorus ratio (DON:DOP, molar ratio); Dissolved Organic Carbon (DOC, uM); Dissolved Methane (CH4, nM); Depth range in sediment (cm); Hydrogen Sulfide (H2S, mM); Sulfate (mM) ; Chloride (mM); Sodium (mM); Potassium (mM); Magnesium (mM); Calcium (mM); Methane Oxidation (pmol cc-1 d-1) Sulfate Reduction (nmol cc-1 d-1); Solid Organic Matter (Lost on ignition, %); Total particulate Nitrogen (TPN, %) Total Particulate Carbon (TPN, %); Particulate Organic Carbon (POC, %), Particulate Inorganic Carbon (PIC, %). Cruise ID: EN505
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:
                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  +1-301-713-3277
                    address:  (CI_Address)
                        electronicMailAddress:  NCEI.Info@noaa.gov
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
            distributorFormat:  (MD_Format)
                name:  Originator data format
                version: (unknown)
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                transferSize:
                  Real:  7658.38
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/0194300
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  NCEI Dataset Landing Page
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/oas/194300
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  Descriptive Information
                    description:  Navigate directly to the URL for a descriptive web page with download links.
                    function:  (CI_OnLineFunctionCode) information
                onLine:  (CI_OnlineResource)
                    linkage: https://www.ncei.noaa.gov/archive/accession/download/194300
                    protocol:  HTTPS
                    applicationProfile:  Web browser
                    name:  HTTPS
                    description:  Navigate directly to the URL for data access and direct download.
                    function:  (CI_OnLineFunctionCode) download
                onLine:  (CI_OnlineResource)
                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0144/0194300/
                    protocol:  FTP
                    applicationProfile:  Any FTP client
                    name:  FTP
                    description:  These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
                    function:  (CI_OnLineFunctionCode) download
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
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                description:  NCEI Accession 0194300 v1.1 was published.
                dateTime:
                  DateTime:  2019-09-09T15:27:44Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0194300 v1.1
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0194300/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0194300 v1.1
                                    description:  published 2019-09-09T15:27:44Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column conductivity (measured); Units: s/m; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column depth (measured); Units: m; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column temperature (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column density (measured); Units: kg/m^3; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column potential temperature (measured); Units: degree C; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column pressure (measured); Units: dbar; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water column oxygen (measured); Units: umol/kg; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: water column salinity (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: water column beam attenuation (measured); Units: 1/m; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: water column beam transmission (measured); Units: %; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: water column fluorescence (measured); Units: mg/m^3; Observation Category: in situ; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: ship zonal velocity component (measured); Units: u, m/s; Observation Category: in situ; Sampling Instrument: ADCP.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: ship meridional velocity component (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: ADCP.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: AIR TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: air pressure (measured); Units: mBar; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SEA SURFACE TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: precipitation rate (measured); Units: mm/hr; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: relative humidity (measured); Units: %; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: relative wind speed (measured); Units: knots; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: relative wind direction (measured); Units: degree; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: true wind speed (measured); Units: knots; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: true wind direction (measured); Units: degree; Observation Category: in situ; Sampling Instrument: underway sensor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: thermosalinograph salinity (measured); Units: psu; Observation Category: in situ; Sampling Instrument: thermosalinographs.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: thermosalinograph temperature (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: thermosalinographs.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: thermosalinograph conductivity (measured); Units: S/m; Observation Category: in situ; Sampling Instrument: thermosalinographs.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: thermosalinograph sound velocity (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: thermosalinographs.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH (measured); Units: N/A; Observation Category: profile; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DISSOLVED OXYGEN (measured); Units: mg/L; Observation Category: profile; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: NITRITE (measured); Units: um; Observation Category: profile; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: NITRATE (measured); Units: um; Observation Category: profile; Sampling Instrument: CTD.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: nitrate + nitrite content (concentration) (measured); Units: um; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved inorganic nitrogen (measured); Units: uM; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Total Dissolved Nitrogen (TDN) (measured); Units: um; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Dissolved Organic Nitrogen (measured); Units: uM; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved phosphate (measured); Units: um; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: total dissolved phosphate (measured); Units: um; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved organic phosphorus (measured); Units: uM; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved inorganic nitrogen to phosphorus ratio (measured); Units: molar ratio; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved organic nitrogen to phosphorus ratio (measured); Units: molar ratio; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DISSOLVED ORGANIC CARBON (measured); Units: um; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: dissolved methane (measured); Units: nm; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: depth range in sediment (measured); Units: cm; Observation Category: in situ; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Hydrogen Sulfide (H2S) (measured); Units: mM; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: methane oxidation (measured); Units: pmol cc-1 d-1; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: sulfate reduction (measured); Units: nmol cc-1 d-1; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: solid organic matter (measured); Units: %; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: total particulate nitrogen (measured); Units: %; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: total particulate carbon (measured); Units: %; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: PARTICULATE ORGANIC CARBON (measured); Units: %; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Particulate Inorganic Carbon (measured); Units: %; Observation Category: laboratory analysis; Sampling Instrument: sediment sampler - corer.
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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:  ADCP
            type:  ADCP
            description:  Acoustic Doppler Current Profiler The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile. As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  CTD
            type:  CTD
            description:  Conductivity-Temperature-Depth probe
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  sediment sampler - corer
            type:  sediment sampler - corer
            description:  sediment coring device gravity or other coring device used to collect surfacial and near-surficial sediment samples
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  thermosalinograph
            type:  thermosalinograph
            description:  automated sea surface temperature and salinity instrument, usually attached to the hull of a ship Thermosalinograph is an automated Sea Surface Temperature and Salinity measurement system making measurement on board a ship using a water intake. [https://www.aoml.noaa.gov/phod/tsg/about.php 2021-01-29]
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  ENDEAVOR
            description:  Flag: United States of America Vessel Type: Container Ship DOB: IMO: Farrell Lines, Inc.
            instrument: (missing)