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Trajectory profile data from glider ru30, including pH, total alkalinity, and aragonite saturation state, deployed by Rutgers, the State University of New Jersey, in the Mid-Atlantic Bight from 2021-02-26 to 2021-03-21 (NCEI Accession 0278635)


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            title:  Trajectory profile data from glider ru30, including pH, total alkalinity, and aragonite saturation state, deployed by Rutgers, the State University of New Jersey, in the Mid-Atlantic Bight from 2021-02-26 to 2021-03-21 (NCEI Accession 0278635)
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                date:  2023-06-01
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                  Anchor:  DOI 10.25921/pegh-ac02
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5763 Lori M. Garzio
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/225 Rutgers, The State University of New Jersey
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/225 Rutgers, The State University of New Jersey
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5535 Grace K. Saba
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/225 Rutgers, The State University of New Jersey
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/225 Rutgers, The State University of New Jersey
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        abstract:  This dataset contains the trajectory profile data from glider ru30 from one seasonal deployment (2021-02-26 to 2021-03-21) to investigate carbonate chemistry and monitor ocean acidification seasonally in the Mid-Atlantic Bight. The glider used for the automated observation includes an integrated deep rated version of the Ion Sensitive Field Effect Transistor (ISFET)-based pH sensor. The pH sensor unit is complemented with existing glider sensors including a CTD, a WETLabs FLBBCD ECO puck configured for simultaneous chlorophyll fluorescence and optical backscatter measurements, and an Aanderaa Optode for measuring dissolved oxygen. This deployment out of Tuckerton, NJ ran a cross-shelf transect (along E line) to an offshore waypoint north of Carteret Canyon, then transected SSW to Wilmington Canyon, then NW back to Tuckerton, NJ. This glider track covered Atlantic sea scallop and Atlantic surfclam habitats in the southern MAB. This delayed mode, high-resolution post-processed dataset contains CTD, chlorophyll a, dissolved oxygen and pH data.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:  Funding Information: U.S. National Oceanic and Atmospheric Administration Ocean Acidification Program (NOAA OAP) (Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water System of the U.S. Northeast Large Marine Ecosystem, NA19OAR0170349)
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                    date:  2023-05-19
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/622 ARAGONITE SATURATION STATE
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                title:  Saba, Grace K.; Garzio, Lori M. (2023). Trajectory profile data from glider ru30, including pH, Total Alkalinity, and Aragonite Saturation State, deployed by Rutgers, the State University of New Jersey in the Mid-Atlantic Bight from 2021-05-03 to 2021-05-27 (NCEI Accession 0279102). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/my81-x656.
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                title:  Saba, Grace K.; Garzio, Lori M. (2023). Trajectory profile data from glider ru30, including including pH, total alkalinity, water temperature, salinity and aragonite saturation state, deployed by Rutgers, the State University of New Jersey in the Mid-Atlantic Bight from 2021-10-20 to 2021-11-17 (NCEI Accession 0281780). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/2rbf-c473.
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                title:  Saba, Grace K.; Garzio, Lori M. (2023). Trajectory profile data from glider ru30, including pH, total alkalinity, and aragonite saturation state, deployed by Rutgers, the State University of New Jersey in the Mid-Atlantic Bight from 2021-07-16 to 2021-08-20 (NCEI Accession 0281781). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0tbw-m849.
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Profile Center Time; Abbreviation: profile_time; Unit: seconds since 1970-01-01; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated timestamp corresponding to the mid-point of the profile; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Profile Center Longitude; Abbreviation: profile_lon; Unit: degree_east; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Interpolated to provide an estimate of the longitude at the mid-point of the profile; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Profile Center Latitude; Abbreviation: profile_lat; Unit: degree_north; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Interpolated to provide an estimate of the latitude at the mid-point of the profile; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Latitude; Abbreviation: lat; Unit: degree_north; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: m_gps_lat (measured latitude) converted to decimal degrees and interpolated; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Longitude; Abbreviation: lon; Unit: degree_east; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: m_gps_lon (measured longitude) converted to decimal degrees and interpolated; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Depth; Abbreviation: depth; Unit: meters; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated from pressure and latitude using gsw.z_from_p; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water pressure; Abbreviation: pressure; Unit: dbar; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water temperature; Abbreviation: temperature; Unit: degrees Celsius; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Suspect/failed IOOS QC values, and values flagged by a CTD hysteresis test have been removed.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water conductivity; Abbreviation: conductivity; Unit: S m-1; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Suspect/failed IOOS QC values, and values flagged by a CTD hysteresis test have been removed.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water density; Abbreviation: density; Unit: kg m-3; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Density calculated from temperature, practical salinity, pressure, latitude, and longitude using Gibbs gsw SA_from_SP, CT_from_t, and rho functions. Suspect/failed IOOS QC values, and values flagged by a CTD hysteresis test have been removed.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water practical salinity; Abbreviation: salinity; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Practical salinity calculated from conductivity, temperature, and pressure using the Gibbs gsw SP_from_C function. Suspect/failed IOOS QC values, and values flagged by a CTD hysteresis test have been removed.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Chlorophyll a; Abbreviation: chlorophyll_a; Unit: ug/l; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 4662. Factory calibrated 2017-02-24..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH reference voltage; Abbreviation: pH_reference_voltage_corrected; Unit: volts; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Measured pH reference voltage shifted by an optimal time shift calculated by glider segment in order to minimize separation between glider down and upcasts.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10344. Factory calibrated 2020-03-06. Sensor calibration coefficents: f6: -6.9342e-22, f5: 5.203e-18, f4: -1.5993e-14, f3: 2.6022e-11, f2: -2.3831e-08, f1: 1.3905e-05, k0: -1.401602, k2: -0.001064. Accuracy: ±0.05 Precision ±0.001; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Standardization Technique Description: For the initial calibration, the pressure response function f(P), temperature response constants k2, and conditioning offset k0 are derived in a controlled laboratory. Calibrations for f(P) and k2 are performed in a pressure vessel with a working fluid of 0.01N Hydrochloric acid (HCl). pH sensors undergo oceanographic temperature ranges (5-35°C) and pressure ranges (0-3000 psi) for 1 week. For the k0 calibration, the sensor is conditioned to natural seawater for 3-5 days before k0 is calculated. For each subsequent maintenance calibration the sensor is cleaned, the sensor is re-conditioned to natural seawater and k0 is re-calculated. The pH sensor is factory calibrated by the manufacturer at least once per year.; Method reference: Optimal time shifts applied in order to minimize separation between glider down and upcasts as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664 and Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH total uncorrected; Abbreviation: pH_raw; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated from sensor calibration coefficents, interpolated pressure, interpolated salinity, interpolated temperature, and measured reference voltage. CTD variables are adjusted for thermal lag. No correction applied to calculated pH.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10344. Factory calibrated 2020-03-06. Sensor calibration coefficents: f6: -6.9342e-22, f5: 5.203e-18, f4: -1.5993e-14, f3: 2.6022e-11, f2: -2.3831e-08, f1: 1.3905e-05, k0: -1.401602, k2: -0.001064. Accuracy: ±0.05 Precision ±0.001; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Standardization Technique Description: For the initial calibration, the pressure response function f(P), temperature response constants k2, and conditioning offset k0 are derived in a controlled laboratory. Calibrations for f(P) and k2 are performed in a pressure vessel with a working fluid of 0.01N Hydrochloric acid (HCl). pH sensors undergo oceanographic temperature ranges (5-35°C) and pressure ranges (0-3000 psi) for 1 week. For the k0 calibration, the sensor is conditioned to natural seawater for 3-5 days before k0 is calculated. For each subsequent maintenance calibration the sensor is cleaned, the sensor is re-conditioned to natural seawater and k0 is re-calculated. The pH sensor is factory calibrated by the manufacturer at least once per year.; Uncertainty: ±0.05; Method reference: Calculations were performed in Python as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH total; Abbreviation: pH_corrected; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated from sensor calibration coefficents, interpolated pressure, interpolated salinity, interpolated temperature, and measured reference voltage shifted by an optimal time shift calculated by glider segment in order to minimize separation between glider down and upcasts. CTD variables are adjusted for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10344. Factory calibrated 2020-03-06. Sensor calibration coefficents: f6: -6.9342e-22, f5: 5.203e-18, f4: -1.5993e-14, f3: 2.6022e-11, f2: -2.3831e-08, f1: 1.3905e-05, k0: -1.401602, k2: -0.001064. Accuracy: ±0.05 Precision ±0.001; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Standardization Technique Description: For the initial calibration, the pressure response function f(P), temperature response constants k2, and conditioning offset k0 are derived in a controlled laboratory. Calibrations for f(P) and k2 are performed in a pressure vessel with a working fluid of 0.01N Hydrochloric acid (HCl). pH sensors undergo oceanographic temperature ranges (5-35°C) and pressure ranges (0-3000 psi) for 1 week. For the k0 calibration, the sensor is conditioned to natural seawater for 3-5 days before k0 is calculated. For each subsequent maintenance calibration the sensor is cleaned, the sensor is re-conditioned to natural seawater and k0 is re-calculated. The pH sensor is factory calibrated by the manufacturer at least once per year.; Uncertainty: ±0.05; Method reference: pH calculations were performed in Python as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664. Optimal time shifts applied in order to minimize separation between glider down and upcasts as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664 and Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Total alkalinity; Abbreviation: total_alkalinity; Unit: micromoles kg-1; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated from thermal lag adjusted salinity using the linear relationship (TA = 50.79 * salinity + 540.2) determined from in-situ water sampling data taken during glider deployment and recovery in addition to ship-based water samples as described in Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Total Alkalinity is estimated from salinity via the method described in Calculation Method and Parameters.; Method reference: Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Aragonite saturation state; Abbreviation: aragonite_saturation_state; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Calculated using PyCO2SYS (Humphreys et al. (2020) doi:10.5281/zenodo.3744275, Lewis and Wallace (1998)) with inputs of corrected pH on the total scale, total alkalinity, in situ salinity_interpolated, in situ temperature_interpolated, in situ pressure_interpolated, K1 and K2 dissociation constants defined by Merbach and refit by Dickson and Millero, KSO4 dissociation constant of Dickson, KHF dissociation constant of Perez and Fraga, and borate-to-salinity ratio of Uppstrom (1979); Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Aragonite saturation state is estimated via the method described in Calculation Method and Parameters..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Dissolved oxygen concentration in sea water uncorrected; Abbreviation: oxygen_concentration_raw; Unit: micromoles L-1; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Raw measured dissolved oxygen concentration, no correction applied.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 242. Factory calibrated 2019-09-25. In-house check 2020-02-03..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Dissolved oxygen concentration in sea water; Abbreviation: oxygen_concentration_corrected; Unit: micromoles L-1; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Measured dissolved oxygen shifted by an optimal time shift calculated by glider segment in order to minimize separation between glider down and upcasts.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 242. Factory calibrated 2019-09-25. In-house check 2020-02-03.; Method reference: Optimal time shifts applied in order to minimize separation between glider down and upcasts as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664 and Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Oxygen saturation uncorrected; Abbreviation: oxygen_saturation_raw; Unit: percent; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Raw measured oxygen saturation, no correction applied.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 242. Factory calibrated 2019-09-25. In-house check 2020-02-03..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Oxygen saturation; Abbreviation: oxygen_saturation_corrected; Unit: percent; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Measured oxygen saturation shifted by an optimal time shift calculated by glider segment in order to minimize separation between glider down and upcasts.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 242. Factory calibrated 2019-09-25. In-house check 2020-02-03.; Method reference: Optimal time shifts applied in order to minimize separation between glider down and upcasts as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664 and Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Interpolated sea water pressure; Abbreviation: pressure_interpolated; Unit: dbar; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Linear interpolated sea water pressure used to calculate pH.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Interpolated sea water temperature; Abbreviation: temperature_interpolated; Unit: degrees Celsius; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Linear interpolated sea water temperature (thermal lag adjusted) used to calculate pH; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Interpolated sea water practical salinity; Abbreviation: salinity_interpolated; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Linear interpolated sea water practical salinity (thermal lad adjusted) used to calculate pH; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH reference voltage uncorrected; Abbreviation: pH_reference_voltage_raw; Unit: volts; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Raw measured pH reference voltage, no correction applied.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10344. Factory calibrated 2020-03-06. Sensor calibration coefficents: f6: -6.9342e-22, f5: 5.203e-18, f4: -1.5993e-14, f3: 2.6022e-11, f2: -2.3831e-08, f1: 1.3905e-05, k0: -1.401602, k2: -0.001064. Accuracy: ±0.05 Precision ±0.001; Detailed sampling and analyzing information: Once the glider is deployed it completes vertical profiles to collect data throughout the water column. The pH sensor (sampling rate 1 Hz) is coupled to a CTD unit (sampling rate 0.5 Hz) on the glider to provide simultaneous measurements of measured reference voltage, salinity, pressure, and temperature. Standardization Technique Description: For the initial calibration, the pressure response function f(P), temperature response constants k2, and conditioning offset k0 are derived in a controlled laboratory. Calibrations for f(P) and k2 are performed in a pressure vessel with a working fluid of 0.01N Hydrochloric acid (HCl). pH sensors undergo oceanographic temperature ranges (5-35°C) and pressure ranges (0-3000 psi) for 1 week. For the k0 calibration, the sensor is conditioned to natural seawater for 3-5 days before k0 is calculated. For each subsequent maintenance calibration the sensor is cleaned, the sensor is re-conditioned to natural seawater and k0 is re-calculated. The pH sensor is factory calibrated by the manufacturer at least once per year..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Profile ID; Abbreviation: profile_id; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Unique identifier of the profile. The profile ID is the mean profile timestamp; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Trajectory/Deployment Name; Abbreviation: trajectory; Observation type: Glider profile trajectory; Calculation method and parameters: A trajectory is a single deployment of a glider and may span multiple data files.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Interpolated depth; Abbreviation: depth_interpolated; Unit: meters; Observation type: Glider profile trajectory; Calculation method and parameters: Linear interpolated depth using pandas.DataFrame.interpolate; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water conductivity - thermal lag adjusted; Abbreviation: conductivity_lag_shifted; Unit: S m-1; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Conductivity corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9416. Factory calibrated 2020-02-12.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water density - thermal lag adjusted; Abbreviation: density_lag_shifted; Unit: kg m-3; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Density corrected for thermal lag. Calculated using the gsw.rho function.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water practical salinity - thermal lag adjusted; Abbreviation: salinity_lag_shifted; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Salinity corrected for thermal lag. Calculated using the gsw.SP_from_C function.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Optical backscatter (wavelength 700 nm) measured at 117 degrees; Abbreviation: beta_700nm; Unit: m-1 sr-1; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 4662. Factory calibrated 2017-02-24..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Colored Dissolved Organic Matter; Abbreviation: cdom; Unit: ppb; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 4662. Factory calibrated 2017-02-24..
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Sea water temperature - thermal lag adjusted; Abbreviation: temperature_lag_shifted; Unit: degrees Celsius; Observation type: Glider profile trajectory; Calculation method and parameters: Sea water temperature corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G2 glider ru30 .
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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:  optical backscatter sensor
            type:  optical backscatter sensor
            description:  optical sensor for measuring turbidity and suspended solids concentrations The OBS is an optical sensor for measuring turbidity and suspended solids concentrations by detecting infra-red light scattered from suspended matter. The response of the OBS sensors strongly depends on the size, composition and shape of the suspended particles. [https://www.coastalwiki.org/wiki/Optical_backscatter_point_sensor_(OBS), accessed 2023-09-11]
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  salinometer
            type:  salinometer
            description:  generic salinometer use salinometer when the instrument type used is unclear but the data include salinity measurements
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  temperature sensor
            type:  temperature sensor
            description:  A sensor used to measure temperature.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  titrator
            type:  titrator
            description:  titrator
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  RU30
            description:  Updated information from ICES for the vessel RU30 from UNITED STATES(US). Name : RU30 Country(s) : UNITED STATES(US) (ISO Country Code) Platform Class : 27 sub-surface gliders (buoyancy-based propulsion capable at variable depths not constrained to be near sea surface) Commissioned Date : 2014-03-12 Current Length : 1.8 WOD Code: 10854 Notes : Underwater Slocum glider operated by Rutgers, The State University of New Jersey. Glider RU30 was active as of 2015. Information Sources: - http://www.ndbc.noaa.gov/data/stations/station_table.txt - http://gliders.ioos.us/users/rutgers/deployments - http://gliders.ioos.us/users/rutgers/deployments - http://tds.gliders.ioos.us/thredds/dodsC/Rutgers-University_ru30-20140702T2329_Files/ru30-20140707T154225_rt0.nc.html - http://marine.rutgers.edu/cool/auvs/index.php?gid=64 Confirmed by NOAA on 2016-03-23. Submitted to ICES 2014-10-30.
            instrument: (missing)