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TEMPERATURE, SALINITY, and CURRENT VELOCITIES collected from a long-term FOCAL mooring in the Gulf of Mexico from 2007-10-01 to 2016-08-19 (NCEI Accession 0248354)


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            title:  TEMPERATURE, SALINITY, and CURRENT VELOCITIES collected from a long-term FOCAL mooring in the Gulf of Mexico from 2007-10-01 to 2016-08-19 (NCEI Accession 0248354)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1411 Dauphin Island Sea Lab (DISL)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1581 The University of Southern Mississippi (USM)
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        abstract:  This dataset contains temperature, salinity, dissolved oxygen, and current velocities obtained from the long-term Fisheries Oceanography in Coastal Alabama (FOCAL) mooring operated by the Dauphin Island Sea Lab (DISL). The mooring is located at 30°05.410'N, 88°12.694'W, along the 20-m isobath about 25 km southwest of Mobile Bay, Alabama. This dataset contains non-continuous data collected between 2007-10-01 and 2016-08-19 using a variety of instruments, including thermistors, CTDs, and a bottom-mounted, upward-looking RDI 600 Workhorse Sentinel ADCP. Parameters include temperature; salinity; current vectors, speeds, and direction; dissolved oxygen and oxygen saturation; and sound velocity, although not all datasets contain each parameter. The data are in ASCII format, and the raw ADCP data is also included.
        purpose:  Data were collected from a long-term mooring operated by Dauphin Island Sea Lab (DISL) to enable physical and interdisciplinary studies of circulation, hydrography, and the biophysical interactions associated with the inner shelf of the northern Gulf of Mexico.
        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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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/91 CONDUCTIVITY
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                description:  Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: dbar; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: SeaBird SBE25, SeaBird SBE19+.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees C; Observation Category: in situ; Sampling Instrument: temperature probe, CTD; Sampling and Analyzing Method: RBR Duo, SBE-37 CTD, SBE-39 thermistor.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CONDUCTIVITY (measured); Units: Siemens/m; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: SeaBird SBE37.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Sea-Bird SBE37.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DISSOLVED OXYGEN (measured); Units: mL/L; Observation Category: in situ; Sampling Instrument: oxygen sensor; Sampling and Analyzing Method: RBR Duo (membrane sensor, 1 Hz), HOBO U26-001 (optical sensor, 0.5 Hz), YSI 6600 (1 sample/60s).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: OXYGEN - PERCENT SATURATION (measured); Units: %; Observation Category: in situ; Sampling Instrument: oxygen sensor; Sampling and Analyzing Method: RBR Duo (membrane sensor, 1 Hz), HOBO U26-001 (optical sensor, 0.5 Hz), YSI 6600 (1 sample/60 seconds).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: dbar; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Seabird SBE-37.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SOUND VELOCITY (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Seabird SBE-37, Chen-Millero.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DEPTH - OBSERVATION (measured); Units: meters; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Seabird SBE-37.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: specific conductance (measured); Units: micro-siemens/cm; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Seabird SBE-37.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: WATER DENSITY (measured); Units: kg/m^3; Observation Category: in situ; Sampling Instrument: YSI - handheld multi-parameter instrument; Sampling and Analyzing Method: moored YSI 6600.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CURRENT SPEED - EAST/WEST COMPONENT (U) (measured); Units: cm/s; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: RDI 600 kHz ADCP Workhorse Sentinel.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CURRENT SPEED - NORTH/SOUTH COMPONENT (V) (measured); Units: cm/s; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: RDI 600 kHz ADCP Workhorse Sentinel.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CURRENT SPEED (measured); Units: cm/s; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: RDI 600 kHz ADCP Workhorse Sentinel.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CURRENT DIRECTION (measured); Units: angular degree; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: RDI 600 kHz ADCP Workhorse Sentinel.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DEPTH - BOTTOM (measured); Units: m; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: RDI 600 kHz ADCP Workhorse Sentinel.
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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 - moored CTD
            type:  CTD - moored CTD
            description:  CTD - moored CTD
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  multi-parameter water quality sensor
            type:  multi-parameter water quality sensor
            description:  used to measure temperature, salinity, dissolved oxygen, and other parameters Instrument used to measure temperature, salinity, dissolved oxygen, and other parameters, often used to measure water quality parameters. Can be a hand-held instrument or a sonde for unattended monitoring. Often used in coastal water monitoring stations. YSI is the preeminent brand (as of 2024).
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  oxygen sensor
            type:  oxygen sensor
            description:  Any instrument that measures oxygen content in a compound.