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ERDDAP
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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | RMI pH Glider Groundtruthing
|
| Institution: | Rutgers University (Dataset ID: rmi_pH_glider_groundtruthing) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Files
| Make a graph
|
Attributes {
s {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.6820121e+9, 1.73204622e+9;
String axis "T";
String calendar "gregorian";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
glider_trajectory {
String description "Glider deployment/trajectory ID";
String ioos_category "Unknown";
String long_name "Glider Trajectory";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 _FillValue -9999.0;
Float32 actual_range 39.1698, 40.376;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude of the water sample collection";
String ioos_category "Location";
String long_name "Latitude (Water Sample)";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 _FillValue -9999.0;
Float32 actual_range -74.3592, -73.7442;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude of the water sample collection";
String ioos_category "Location";
String long_name "Longitude (Water Sample)";
String standard_name "longitude";
String units "degrees_east";
}
glider_time {
Float64 actual_range 1.6820124e+9, 1.73204088e+9;
String calendar "proleptic_gregorian";
String description "Timestamp (UTC) of the glider sample";
String ioos_category "Time";
String long_name "Time (Glider)";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
longitude_glider {
Float32 _FillValue -9999.0;
Float32 actual_range -74.3575, -73.7407;
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude of the glider sample";
String ioos_category "Location";
String long_name "Longitude (Glider)";
String standard_name "longitude";
String units "degrees_east";
}
latitude_glider {
Float32 _FillValue -9999.0;
Float32 actual_range 39.17, 40.3759;
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude of the glider sample";
String ioos_category "Location";
String long_name "Latitude (Glider";
String standard_name "latitude";
String units "degrees_north";
}
deployment_recovery {
String description "Water sampling taken at glider deployment or recovery";
String ioos_category "Unknown";
String long_name "Deployment Recovery";
}
collection_method {
String description "Method by which the water samples were collected (e.g., Niskin, CTD Rosette, bucket)";
String ioos_category "Unknown";
String long_name "Collection Method";
}
glider_n {
Int32 _FillValue -9999;
Int32 actual_range 37, 248;
String description "Sample size of glider data";
String ioos_category "Statistics";
String long_name "Glider N";
}
discrete_n {
Int32 _FillValue -9999;
Int32 actual_range 1, 2;
String description "Sample size of discrete water samples";
String ioos_category "Statistics";
String long_name "Discrete N";
}
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Int32 _FillValue -9999;
Int32 actual_range 2, 21;
String axis "Z";
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String description "Depth at which water samples and glider measurements were collected";
String ioos_category "Location";
String long_name "Depth";
String positive "down";
String standard_name "depth";
String units "m";
}
distance {
Int32 _FillValue -9999;
Int32 actual_range 0, 1328;
String description "Distance calculated between the glider coordinates and water sampling coordinates";
String ioos_category "Unknown";
String long_name "Distance";
String units "m";
}
pH_glider {
Float32 _FillValue -9999.0;
Float32 actual_range 7.693, 8.27;
Float64 colorBarMaximum 9.0;
Float64 colorBarMinimum 7.0;
String description "Median pH measured by the glider at depth +/- 1m";
String ioos_category "Salinity";
String long_name "pH (Glider)";
String standard_name "sea_water_ph_reported_on_total_scale";
String units "1";
}
pH_discrete {
Float32 _FillValue -9999.0;
Float32 actual_range 7.631, 8.284;
Float64 colorBarMaximum 9.0;
Float64 colorBarMinimum 7.0;
String description "Median pH measured from discrete water samples, laboratory value was corrected for temperature, pressure, and salinity using pyCO2SYS";
String ioos_category "Salinity";
String long_name "pH (Water Sample)";
String standard_name "sea_water_ph_reported_on_total_scale";
String units "1";
}
pH_difference {
Float32 _FillValue -9999.0;
Float32 actual_range -0.201, 0.202;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String description "pH_glider minus pH_discrete";
String ioos_category "Salinity";
String long_name "pH Difference";
String units "1";
}
TA_glider {
Float32 _FillValue -9999.0;
Float32 actual_range 1965.0, 2191.0;
String description "Calculated from glider-based salinity using a linear relationship 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. This value is median glider-based TA at depth +/- 1m";
String ioos_category "CO2";
String long_name "Total Alkalinity (Glider)";
String units "micromoles kg-1";
}
TA_discrete {
Float32 _FillValue -9999.0;
Float32 actual_range 2006.0, 2195.0;
String description "Median total alkalinity measured from discrete water samples";
String ioos_category "CO2";
String long_name "Total Alkalinity (Water Sample)";
String units "micromoles kg-1";
}
TA_difference {
Float32 _FillValue -9999.0;
Float32 actual_range -51.0, 50.0;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String description "TA_glider minus TA_discrete";
String ioos_category "CO2";
String long_name "Total Alkalinity Difference";
String units "1";
}
}
NC_GLOBAL {
String acknowledgement "Funding provided by the Research and Monitoring Initiative (RMI; administered by NJDEP and New Jersey Board of Public Utilities, BPU).";
String cdm_data_type "Point";
String comment "Comparisons between data recorded by gliders and discrete water samples taken at glider deployments and recoveries. Water samples were collected via Niskin bottles mounted on a CTD-rosette, or via individual Niskin bottle casts and preserved with saturated mercuric chloride until analysis. pH (on the Total pH scale) of water samples was measured spectrophotometrically at 25°C with purified meta-cresol purple (mCP, Liu et al. 2011) using 10 cm pathlength cylindrical glass cells and an Agilent Technologies Cary 8454 UV-Vis spectrometer. pH was calculated according to the equations presented in Douglas and Byrne (2017). Total alkalinity (TA) open-cell titrations for water samples were performed by a custom-built titration apparatus, following the approach of Standard Operating Procedure 3b (Dickson et al. 2007). DIC was quantified using a non-dispersive infrared method (Chen et al., 2015; Huang et al., 2012). TA and DIC accuracies were determined using Certified Reference Materials (CRMs) from Andrew Dickson’s group at the Scripps Institution of Oceanography. Measured pH was corrected for in-situ temperature, pressure and salinity using the PyCO2SYS python package.";
String contributor_name "Grace Saba,Josh Kohut,Dave Aragon,Nicole Waite,Brian Buckingham,Jessica Leonard,John Kerfoot,Lori Garzio,Laura Nazzaro";
String contributor_role "Principal Investigator,Principal Investigator,Glider Pilot,Glider Pilot,Glider Pilot,Glider Pilot,Data Management,Data Management,Data Management";
String Conventions "ACDD 1.3, COARDS, CF-1.10";
String creator_email "ecosystemdata@marine.rutgers.edu";
String creator_institution "Rutgers University";
String creator_name "Rutgers Marine Ecosystem Data Team";
String creator_type "group";
String creator_url "https://rucool.marine.rutgers.edu/";
Float64 Easternmost_Easting -73.7442;
String featureType "Point";
String geospatial_bounds_crs "EPSG:6347";
Float64 geospatial_lat_max 40.376;
Float64 geospatial_lat_min 39.1698;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -73.7442;
Float64 geospatial_lon_min -74.3592;
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 21.0;
Float64 geospatial_vertical_min 2.0;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"2025-07-17T11:42:07Z (local files)
2025-07-17T11:42:07Z https://rucool-sampling.marine.rutgers.edu/erddap/tabledap/rmi_pH_glider_groundtruthing.html";
String id "rmi_pH_glider_groundtruthing";
String infoUrl "https://rucool.marine.rutgers.edu/";
String institution "Rutgers University";
String keywords "alkalinity, carbon, carbon dioxide, centers, chemistry, co2, collection, collection_method, conductivity, control, ctd, data, deployment, deployment_recovery, depth, difference, dioxide, discrete, discrete_n, distance, earth, Earth Science > Oceans > Ocean Chemistry > pH, environmental, glider, glider_n, glider_time, glider_trajectory, groundtruthing, information, latitude, latitude_glider, longitude, longitude_glider, method, national, ncei, nesdis, noaa, ocean, oceans, pH_difference, pH_discrete, pH_glider, quality, recovery, reported, rmi, rutgers, salinity, sample, scale, science, sea, sea_water_ph_reported_on_total_scale, seawater, sonde, statistics, TA_difference, TA_discrete, TA_glider, temperature, time, total, trajectory, university, water";
String keywords_vocabulary "GCMD Science Keywords";
String license "see Data Use Agreement";
Float64 Northernmost_Northing 40.376;
String program "An ecological and oceanographic baseline to inform offshore wind development over the continental shelf off the coast of New Jersey";
String project "RMI Eco-gliders";
String publisher_email "ecosystemdata@marine.rutgers.edu";
String publisher_institution "Rutgers University";
String publisher_name "Rutgers Marine Ecosystem Data Team";
String publisher_type "group";
String references "Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664 ; Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505 ; PyCO2SYS (Humphreys et al. (2020) doi:10.5281/zenodo.3744275; Lewis and Wallace (1998)) ; Liu et al 2011 https://doi.org/10.4319/lo.1998.43.4.0657 ; Douglas and Byrne 2017 https://doi.org/10.1016/j.marchem.2017.02.004 ; Dickson, A.G.; Sabine, C.L. and Christian, J.R. (eds) (2007) Guide to best practices for ocean CO2 measurement. Sidney, British Columbia, North Pacific Marine Science Organization, 191pp. (PICES Special Publication 3; IOCCP Report 8). DOI: https://doi.org/10.25607/OBP-1342 ; Chen, B., Cai, W.-J., & Chen, L. (2015). The marine carbonate system of the Arctic Ocean: Assessment of internal consistency and sampling considerations, summer 2010. Marine Chemistry, 176, 174-188. https://doi.org/10.1016/j.marchem.2015.09.007 ; Huang, W.-J., Wang, Y., & Cai, W.-J. (2012). Assessment of sample storage techniques for total alkalinity and dissolved inorganic carbon in seawater. Limnology and Oceanography: Methods, 10(9), 711-717. https://doi:10.4319/lom.2012.10.711";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 39.1698;
String standard_name_vocabulary "CF Standard Name Table v70";
String summary "Underwater Slocum gliders were deployed with an integrated Conductivity, Temperature, Depth (CTD) and deep rated version of the Ion Sensitive Field Effect Transistor (ISFET)-based pH sensor as well as other sensors. Water samples were taken during deployment and recovery to ground-truth the glider-based pH sensor. Full-resolution quality-controlled glider datasets can be downloaded via the National Centers for Environmental Information (NCEI) Ocean Carbon and Acidification Data System https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system. Full-resolution raw glider datasets with associated QC variables can be downloaded at https://slocum-data.marine.rutgers.edu/erddap/index.html. Carbonate chemistry water sampling data can be downloaded at https://rucool-sampling.marine.rutgers.edu/erddap/tabledap/pH_glider_carb_chem_water_sampling.html. The code to generate these ground-truthing comparisons can be found at https://github.com/rucool/dataset_archiving/tree/master/pH_glider.";
String time_coverage_end "2024-11-19T19:57:00Z";
String time_coverage_start "2023-04-20T17:35:00Z";
String title "RMI pH Glider Groundtruthing";
Float64 Westernmost_Easting -74.3592;
}
}
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