Dataset Overview | National Centers for Environmental Information (NCEI)

Trajectory profile data from glider SBU01-04, including pH, deployed in the Mid-Atlantic Bight, North Atlantic Ocean from 2021-05-13 to 2021-06-14 (NCEI Accession 0293515)

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This dataset contains the trajectory profile data from glider SBU01-04 from one seasonal deployment to investigate conditions in the Middle Atlantic Bight including the monitoring of ocean acidification. 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 was launched south of Shinnecock Bay, NY and thence ran across the shelf, then SW to a NW section up toward NY City and was recovered off Point Pleasant, NJ. This delayed mode, high-resolution post-processed dataset contains CTD, chlorophyll a, dissolved oxygen and pH data.

Dataset Citation

Cite as: Flagg, Charles N. (2024). Trajectory profile data from glider SBU01-04, including pH, deployed in the Mid-Atlantic Bight, North Atlantic Ocean from 2021-05-13 to 2021-06-14 (NCEI Accession 0293515). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/ejyx-pg52. Accessed [date].

Dataset Identifiers

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gov.noaa.nodc:0293515

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Distribution Formats	netCDF (Version: netCDF-3) File Specification: CF-1.6, COARDS, Unidata Dataset Discovery v1.0
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2021-05-13 to 2021-06-14
Spatial Bounding Box Coordinates	West: -73.7566 East: -71.8041 South: 39.2801 North: 40.5774
Spatial Coverage Map

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Associated Resources

Saba, G. K., Wright-Fairbanks, E., Chen, B., Cai, W.-J., Barnard, A. H., Jones, C. P., Branham, C. W., Wang, K., & Miles, T. (2019). The Development and Validation of a Profiling Glider Deep ISFET-Based pH Sensor for High Resolution Observations of Coastal and Ocean Acidification. Frontiers in Marine Science, 6. https://doi.org/10.3389/fmars.2019.00664
- https://doi.org/10.3389/fmars.2019.00664
  related journal article
NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
- https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
  OCADS website
Wright‐Fairbanks, E. K., Miles, T. N., Cai, W., Chen, B., & Saba, G. K. (2020). Autonomous Observation of Seasonal Carbonate Chemistry Dynamics in the Mid‐Atlantic Bight. Journal of Geophysical Research: Oceans, 125(11). https://doi.org/10.1029/2020jc016505
- https://doi.org/10.1029/2020jc016505
  related journal article
Humphreys, M. P., Schiller, A. J., Sandborn, D., Gregor, L., Pierrot, D., van Heuven, S. M. A. C., Lewis, E. R., & Wallace, D. W. R. (2024). PyCO2SYS: marine carbonate system calculations in Python (Version v1.8.3.4) [Computer software]. Zenodo. https://doi.org/10.5281/zenodo.3744275
- https://doi.org/10.5281/zenodo.3744275
  related book
Lewis, E. R., & Wallace, D. W. R. (1998). Program Developed for CO2 System Calculations [Data set]. Environmental System Science Data Infrastructure for a Virtual Ecosystem. https://doi.org/10.15485/1464255
- https://doi.org/10.15485/1464255
  related dataset
IOOS QC Manual for Real-Time Quality Control of pH Data Observations https://cdn.ioos.noaa.gov/media/2019/08/pHfinal_8_15_19b.pdf
- https://cdn.ioos.noaa.gov/media/2019/08/pHfinal_8_15_19b.pdf
  Related resource
IOOS QC Manual of Glider Data https://cdn.ioos.noaa.gov/media/2017/12/Manual-for-QC-of-Glider-Data_05_09_16.pdf
- https://cdn.ioos.noaa.gov/media/2017/12/Manual-for-QC-of-Glider-Data_05_09_16.pdf
  Related resource
Autonomous Surface Vehicle (ASV) Gliders Data
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ASV/gliders.html
  Related resource

Publication Dates	publication: 2024-06-06 revision: 2024-06-27 creation: 2024-06-04
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed - NCEI Accession 0293515 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
Supplemental Information	This data package (Submission ID: BHL4VE4R3) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL. In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose	This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations	accessLevel: public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. This data may be redistributed and used without restriction. Data provided as is with no expressed or implied assurance of quality assurance or quality control.

Dataset Citation	Cite as: Flagg, Charles N. (2024). Trajectory profile data from glider SBU01-04, including pH, deployed in the Mid-Atlantic Bight, North Atlantic Ocean from 2021-05-13 to 2021-06-14 (NCEI Accession 0293515). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/ejyx-pg52. Accessed [date].
Cited Authors	Flagg, Charles N. State University of New York at Stony Brook
Principal Investigators	Charles Flagg State University of New York at Stony Brook (SBU)
Contributors	State University of New York at Stony Brook (SBU)
Resource Providers	Charles N. Flagg State University of New York at Stony Brook (SBU) State University of New York at Stony Brook (SBU)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: NOAA Ocean Acidification Program (Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water System of the U.S. Northeast Large Marine Ecosystem, NA19OAR0170349) Funding Information: U.S. National Oceanic and Atmospheric Administration Ocean Acidification Program (NOAA OAP) and the New York Department of Environmental Conservation. (NOAA Funding: Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water System of the U.S. Northeast Large Marine Ecosystem, NA19OAR0170349)

Theme keywords	NODC DATA TYPES THESAURUS CHLOROPHYLL A CONDUCTIVITY DEPTH - OBSERVATION DISSOLVED OXYGEN HYDROSTATIC PRESSURE LATITUDE LONGITUDE OPTICAL BACKSCATTER pH SALINITY WATER DENSITY WATER TEMPERATURE NODC OBSERVATION TYPES THESAURUS biological chemical optical physical WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN OPTICS EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Gliders Profile Provider Variable Abbreviations backscatter chlorophyll_a conductivity density depth lat lon oxygen_concentration_corrected pHtot pressure profile_id profile_lat profile_lon profile_time salinity temperature trajectory
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS State University of New York at Stony Brook NODC SUBMITTING INSTITUTION NAMES THESAURUS State University of New York at Stony Brook
Platform keywords	NODC PLATFORM NAMES THESAURUS sbu01 Global Change Master Directory (GCMD) Platform Keywords SEAGLIDER ICES/SeaDataNet Ship Codes SBU01 (ICES code: 33Q2)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS CTD fluorometer optical backscatter sensor oxygen sensor pH sensor Global Change Master Directory (GCMD) Instrument Keywords CTD > Conductivity, Temperature, Depth FLUOROMETERS > FLUOROMETERS OXYGEN METERS > OXYGEN METERS PH METERS > PH METERS
Place keywords	NODC SEA AREA NAMES THESAURUS Mid-Atlantic Bight New York Bight North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN Provider Geographic Names Mid-Atlantic Bight North Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) Cruise ID glider SBU01 deployment 04 EXPOCODE 33Q220210513 Ocean Acidification Search Keywords Ocean Acidification Program (OAP) Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID Gliders Research Projects U.S National Oceanic and Atmospheric Administration Ocean Acidification Program (NOAA OAP) U.S. Integrated Ocean Observing System (IOOS) and Sustained Underwater Glider Observations for Improving Atlantic Tropical Cyclone Intensity Forecast
Keywords	NCEI ACCESSION NUMBER 0293515

Use Constraints	Cite as: Flagg, Charles N. (2024). Trajectory profile data from glider SBU01-04, including pH, deployed in the Mid-Atlantic Bight, North Atlantic Ocean from 2021-05-13 to 2021-06-14 (NCEI Accession 0293515). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/ejyx-pg52. Accessed [date].
Data License	This dataset is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License. SPDX License: Creative Commons Attribution 4.0 International (CC-BY-4.0)
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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.

Lineage information for: dataset
Processing Steps	2024-06-06T22:52:15Z - NCEI Accession 0293515 v1.1 was published. 2024-06-27T23:49:01Z - NCEI Accession 0293515 was revised and v2.2 was published. Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
Output Datasets	NCEI Accession 0293515 v1.1 NCEI Accession 0293515 v1.1 (download) published 2024-06-06T22:52:15Z NCEI Accession 0293515 v2.2 NCEI Accession 0293515 v2.2 (download) published 2024-06-27T23:49:01Z

Lineage information for: dataset

Processing Steps

2024-06-06T22:52:15Z - NCEI Accession 0293515 v1.1 was published.
2024-06-27T23:49:01Z - NCEI Accession 0293515 was revised and v2.2 was published.
Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.

Output Datasets

NCEI Accession 0293515 v1.1
- NCEI Accession 0293515 v1.1 (download)
  published 2024-06-06T22:52:15Z

NCEI Accession 0293515 v2.2
- NCEI Accession 0293515 v2.2 (download)
  published 2024-06-27T23:49:01Z

Lineage information for: dataset
Processing Steps	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 G3 glider SBU01 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 G3 glider SBU01 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 G3 glider SBU01 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 G3 glider SBU01 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 G3 glider SBU01 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 G3 glider SBU01 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 sw_dpth.m; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17 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 G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17 Parameter or Variable: Sea water temperature; Abbreviation: temperature; Unit: degrees Celsius; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Pumped CTD corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17 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: Pump CTD corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17 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 sw_dens.m.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01 Parameter or Variable: salinity; Abbreviation: salinity; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Practical salinity calculated from thermal-lag corrected conductivity, temperature, and pressure using sw_salt.m.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01 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 G3 glider SBU01; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 5091. Factory calibrated 2020-02-28. Parameter or Variable: Optical backscatter (wavelength 700 nm) measured at 117 degrees; Abbreviation: backscatter; Unit: m-1 sr-1; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 5091. Factory calibrated 2020-02-28. Parameter or Variable: pH total; Abbreviation: pHtot; 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 G3 glider SBU01; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10528. Factory calibrated 2020-08-18. Sensor calibration coefficents: f6: 6.3113e-22, f5: -3.5667e-18, f4: 6.0166e-15, f3: 6.1183e-13, f2: -1.1932e-8, f1: 1.3118e-5, k0: -1.421745, k2: -1.0438e-3; 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 4-5 days before k0 is calculated. For each deployment the sensor is cleaned and the sensor is re-conditioned to natural seawater.; Method reference: Calculations were performed in Matlab using phcalc.m as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664. And then phase lag corrected using the method described in Bittig, et al. 2014 (DOI 10.4319/lom.2014.12.617) Parameter or Variable: Dissolved oxygen concentration in sea water; Abbreviation: oxygen_concentration_corrected; Unit: micromoles; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Optimal lag correction applied in order to minimize separation between glider down and upcasts as described in Bittig, et al. 2014, DOI 10.4319/lom.2014.12.617; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 661. Factory calibrated 2016-11-20. In-house check 2021-09-29.; Method reference: Bittig, et al. 2014, DOI 10.4319/lom.2014.12.617 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 G3 glider SBU01

Lineage information for: dataset

Processing Steps

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 G3 glider SBU01
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 G3 glider SBU01
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 G3 glider SBU01
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 G3 glider SBU01
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 G3 glider SBU01
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 G3 glider SBU01
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 sw_dpth.m; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17
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 G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17
Parameter or Variable: Sea water temperature; Abbreviation: temperature; Unit: degrees Celsius; Observation type: Glider profile trajectory; Measured or calculated: Measured; Calculation method and parameters: Pumped CTD corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17
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: Pump CTD corrected for thermal lag.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird GPCTD Pumped Conductivity, Temperature, Depth (CTD) Sensor. Serial Number 9651. Factory calibrated 2020-02-17
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 sw_dens.m.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01
Parameter or Variable: salinity; Abbreviation: salinity; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Practical salinity calculated from thermal-lag corrected conductivity, temperature, and pressure using sw_salt.m.; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01
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 G3 glider SBU01; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 5091. Factory calibrated 2020-02-28.
Parameter or Variable: Optical backscatter (wavelength 700 nm) measured at 117 degrees; Abbreviation: backscatter; Unit: m-1 sr-1; Observation type: Glider profile trajectory; Measured or calculated: Measured; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Sea-Bird ECO Triplet Puck FLBBCDSLC. Measures Chlorophyll a, beta700nm, CDOM. Serial number 5091. Factory calibrated 2020-02-28.
Parameter or Variable: pH total; Abbreviation: pHtot; 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 G3 glider SBU01; Analyzing instrument: Sea-Bird Deep ISFET Ocean pH Sensor. Serial Number 10528. Factory calibrated 2020-08-18. Sensor calibration coefficents: f6: 6.3113e-22, f5: -3.5667e-18, f4: 6.0166e-15, f3: 6.1183e-13, f2: -1.1932e-8, f1: 1.3118e-5, k0: -1.421745, k2: -1.0438e-3; 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 4-5 days before k0 is calculated. For each deployment the sensor is cleaned and the sensor is re-conditioned to natural seawater.; Method reference: Calculations were performed in Matlab using phcalc.m as described in Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664. And then phase lag corrected using the method described in Bittig, et al. 2014 (DOI 10.4319/lom.2014.12.617)
Parameter or Variable: Dissolved oxygen concentration in sea water; Abbreviation: oxygen_concentration_corrected; Unit: micromoles; Observation type: Glider profile trajectory; Measured or calculated: Calculated; Calculation method and parameters: Optimal lag correction applied in order to minimize separation between glider down and upcasts as described in Bittig, et al. 2014, DOI 10.4319/lom.2014.12.617; Sampling instrument: Teledyne Webb Research Slocum G3 glider SBU01; Analyzing instrument: Aanderaa Oxygen Optode 4831 serial number 661. Factory calibrated 2016-11-20. In-house check 2021-09-29.; Method reference: Bittig, et al. 2014, DOI 10.4319/lom.2014.12.617
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 G3 glider SBU01

Acquisition Information (collection)
Instrument	CTD fluorometer optical backscatter sensor oxygen sensor pH sensor
Platform	sbu01

Last Modified: 2026-07-24T13:21:20Z
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Trajectory profile data from glider SBU01-04, including pH, deployed in the Mid-Atlantic Bight, North Atlantic Ocean from 2021-05-13 to 2021-06-14 (NCEI Accession 0293515)

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