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Dataset Title:	CeNCOOS OAH Monitoring - NOAA West Coast Ocean Acidification (WCOA) Cruise Underway pCO2: 2011-06-27 to 2011-08-31
Institution:	NOAA Pacific Marine Environmental Laboratory (Dataset ID: axiom-netcdf-harvest-caloos-oah-processed-underway-wcoa-2011-shimada)
Range:	longitude = -120.8827 to -130.9316°E, latitude = 35.1758 to 51.7389°N, time = 2011-06-27T00:00:01Z to 2011-08-31T00:02:18Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  crs {
    Int32 actual_range -2147483647, -2147483647;
    String comment "default NCEI description of WSG84";
    String epsg_code "EPSG:4326";
    String grid_mapping_name "latitude_longitude";
    Float64 inverse_flattening 298.257223563;
    String ioos_category "Unknown";
    String long_name "Coordinate Reference System";
    Float64 longitude_of_prime_meridian 0.0;
    String non_null_count "0";
    Float64 semi_major_axis 6378137.0;
  }
  id {
    String cf_role "trajectory_id";
    String ioos_category "Identifier";
    String long_name "trajectory identifier";
    String non_null_count "0";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue -9999.9;
    Float64 actual_range 35.1758, 51.7389;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Observation Location";
    String non_null_count "20210";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -9999.9;
    Float64 actual_range -120.8827, -130.9316;
    String axis "X";
    String ioos_category "Location";
    String long_name "Observation Location";
    String non_null_count "20210";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  quality_flag {
    UInt32 _ChunkSizes 20210;
    Int32 _FillValue -9999;
    Int32 actual_range 2, 3;
    String comments "1 = not calibrated, 2 = acceptable, 3 = questionable, 4 = bad, 5 = not reported, 6 =interpolated, 7 = despiked, 9 = not sampled)";
    String coordinates "time z longitude latitude";
    String coverage_content_type "qualityInformation";
    String ioos_category "Quality";
    String long_name "WOCE Data Quality Flag";
    String non_null_count "20210";
    String reference "http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/WOCE_QualityFlags.pdf";
    String standard_name "aggregate_quality_flag";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 0;
  }
  sea_surface_temperature {
    UInt32 _ChunkSizes 20210;
    Float64 _FillValue -9999.9;
    Float64 actual_range 8.381, 18.214;
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Temperature";
    String long_name "Water Temperature";
    String non_null_count "20210";
    String observation_type "measured";
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
    Float64 valid_max 35.0;
    Float64 valid_min -2.0;
    String variable_type "In-situ observation";
  }
  sea_water_salinity {
    UInt32 _ChunkSizes 20210;
    Float64 _FillValue -9999.9;
    Float64 actual_range 22.805, 34.175;
    String comments "salinity is unitless";
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Salinity";
    String long_name "Salinity";
    String non_null_count "15081";
    String observation_type "derived value";
    String standard_name "sea_water_practical_salinity";
    String units "1e-3";
    Float64 valid_max 70.0;
    Float64 valid_min 0.0;
    String variable_type "derived value";
  }
  surface_partial_pressure_of_carbon_dioxide_in_air {
    UInt32 _ChunkSizes 20210;
    Float64 _FillValue -9999.9;
    Float64 actual_range 373.513618188366, 394.2748836308828;
    String comments "pCO2 in air";
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Pressure";
    String long_name "Surface Partial Pressure of Carbon Dioxide in Air";
    String non_null_count "13728";
    String observation_type "derived value";
    String standard_name "surface_partial_pressure_of_carbon_dioxide_in_air";
    String units "microatm";
    Float64 valid_min 0.0;
    String variable_type "derived value";
  }
  surface_partial_pressure_of_carbon_dioxide_in_sea_water {
    UInt32 _ChunkSizes 20210;
    Float64 _FillValue -9999.9;
    Float64 actual_range 122.07394626804692, 1382.5397116168874;
    String comments "pCO2 in seawater";
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Pressure";
    String long_name "Surface Partial Pressure of Carbon Dioxide in Sea Water";
    String non_null_count "13728";
    String observation_type "derived value";
    String standard_name "surface_partial_pressure_of_carbon_dioxide_in_sea_water";
    String units "microatm";
    Float64 valid_min 0.0;
    String variable_type "derived value";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.309132801e+9, 1.314748938e+9;
    String axis "T";
    String calendar "standard";
    String ioos_category "Time";
    String long_name "Sample Time";
    String non_null_count "20210";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  z {
    Float64 _FillValue -9999.9;
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String non_null_count "20210";
    String positive "down";
    String standard_name "depth";
    String units "m";
    Float64 valid_max 0.0;
    Float64 valid_min 0.0;
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.9.2,hdf5=1.14.0";
    String abstract "This dataset includes chemical and physical underway surface data collected from NOAA Ship Bell M. Shimada in the U.S. West Coast California Current System in June-August 2011. PCO2 in air and seawater were calculated using equations in Pierrot et al., 2009 (doi: 10.1016/j.dsr2.2008.12.005). The instruments used to collect these data include a barometric pressure sensor, a carbon dioxide (CO2) gas analyzer, a shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement, and thermosalinographs. These data were collected by Catherine E. Cosca, Richard A. Feely, Simone R. Alin and Geoffrey T. Lebon of US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory.";
    String acknowledgment "NOAA Pacific Marine Environmental Laboratory";
    String cdm_data_type "Trajectory";
    String cdm_trajectory_variables "id";
    String contributor_name "Marine Lebrec, CeNCOOS";
    String contributor_role "Calculated pCO2 in air and seawater by using the fCO2_calc Excel Macro (https://github.com/dpierrot/fCO2_Calc) converted to a Python script.";
    String Conventions "CF-1.6, ACDD-1.3, Axiom CRUISE-3.0.1";
    String creator_email "simone.r.alin@noaa.gov";
    String creator_name "Simone Alin";
    String date_created "2023-09-28T21:46:30Z";
    String date_issued "2023-09-28T21:46:30Z";
    String date_modified "2023-09-28T21:46:30Z";
    String description "These data were collected along ship track lines by an inline system that pulled water from a fixed depth, so the data collection positions vary in space and time, but not depth. Data were originally stored in CSV files, but converted to netCDF for visualization within a data portal provided by Axiom Data Science.";
    Float64 Easternmost_Easting -130.9316;
    String featureType "Trajectory";
    String geospatial_bbox "POLYGON ((-120.8827 35.1758, -120.8827 51.7389, -130.9316 51.7389, -130.9316 35.1758, -120.8827 35.1758))";
    String geospatial_bounds "POLYGON ((-121.3784 35.1758, -121.6295 35.2061, -121.6365 35.2088, -122.044 35.5382, -123.8139 38.0401, -130.9316 51.7325, -130.9298 51.7326, -130.9095 51.7335, -130.8704 51.7336, -128.4937 51.7389, -128.1994 51.7346, -123.4779 48.2429, -123.4602 48.2293, -123.4515 48.2226, -123.4334 48.2078, -123.425 48.2009, -123.3941 48.1752, -123.3916 48.1681, -120.8827 35.2062, -120.8845 35.2033, -121.062 35.1821, -121.3784 35.1758))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 51.7389;
    Float64 geospatial_lat_min 35.1758;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -130.9316;
    Float64 geospatial_lon_min -120.8827;
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_max "0.0";
    String geospatial_vertical_min "0.0";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2023-09-28T21:46:30Z - This dataset includes ship-based underway measurements of sea surface salinity, sea surface temperature, xCO2 in water and in air, temperature at equilibrium, and barometric pressure of air at equilibrium. These measurements were used to calculate the partial pressure of CO2 in water and in air using Pierrot et al., 2009 equations and the fCO2_calc Excel Macro (https://github.com/dpierrot/fCO2_Calc). The instruments used to collect these data include a barometric pressure sensor, a carbon dioxide (CO2) gas analyzer, a shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement, and thermosalinographs. NetCDF generated by Axiom Data Science
2025-07-05T09:20:40Z https://files.stage.platforms.axds.co/axiom/netcdf_harvest/caloos/oah/processed_underway_wcoa_2011_shimada/processed.nc
2025-07-05T09:20:40Z http://erddap.caloos.org/tabledap/axiom-netcdf-harvest-caloos-oah-processed-underway-wcoa-2011-shimada.das";
    String id "processed_underway_wcoa_2011_shimada_20230501";
    String infoUrl "https://portal.axds.co/?portal_id=152#platform/679d9066-da69-54fa-9c05-be13ab41df35/v2";
    String institution "NOAA Pacific Marine Environmental Laboratory";
    String keywords "Earth Science > Oceans > Ocean Chemistry > Carbon Dioxide > Carbon Dioxide Partial Pressure, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, Earth Science > Oceans > Salinity/Density > Salinity";
    String keywords_vocabulary "GCMD Science Keywords Version 16.5";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String Metadata_Conventions "Unidata Dataset Discovery v1.0";
    String metadata_link "https://doi.org/10.3334/cdiac/otg.vos_bell_shimada/bs_2011";
    String naming_authority "com.axiomdatascience";
    String ncei_template_version "NCEI_NetCDF_Trajectory_Template_v2.0";
    String netcdf_creator_url "http://www.axiomdatascience.com/";
    String netcdf_writer "Axiom Data Science";
    Float64 Northernmost_Northing 51.7389;
    String packrat_source "axiom.netcdf_harvest.netcdf_harvest";
    String packrat_source_id "caloos/oah/processed_underway_wcoa_2011_shimada";
    String packrat_uuid "679d9066-da69-54fa-9c05-be13ab41df35";
    String platform "NOAA Ship Bell M. Shimada";
    String platform_category "cruise_surface";
    String platform_country "United States of America";
    String platform_groups "Ocean Acidification and Hypoxia";
    String platform_owner "unknown";
    String platform_type "ship";
    String project "CeNCOOS OAH Monitoring";
    String publisher_email "axiom@axiomdatascience.com";
    String publisher_name "Axiom Data Science";
    String publisher_url "https://axiomdatascience.com/";
    String references 
"The original dataset can be accessed through the NOAA NCEI OCADS: 
https://doi.org/10.3334/cdiac/otg.vos_bell_shimada/bs_2011";
    String sea_name "Pacific Ocean";
    String sourceUrl "https://files.stage.platforms.axds.co/axiom/netcdf_harvest/caloos/oah/processed_underway_wcoa_2011_shimada/processed.nc";
    Float64 Southernmost_Northing 35.1758;
    String standard_name_vocabulary "NetCDF Climate and Forecast (CF) Metadata Convention Standard Name Table v46";
    String summary "This dataset includes chemical and physical underway surface data collected from NOAA Ship Bell M. Shimada in the U.S. West Coast California Current System in June-August 2011. PCO2 in air and seawater were calculated using equations in Pierrot et al., 2009 (doi: 10.1016/j.dsr2.2008.12.005). The instruments used to collect these data include a barometric pressure sensor, a carbon dioxide (CO2) gas analyzer, a shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement, and thermosalinographs. These data were collected by Catherine E. Cosca, Richard A. Feely, Simone R. Alin and Geoffrey T. Lebon of US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory.";
    String time_coverage_duration "P65DT0H2M17S";
    String time_coverage_end "2011-08-31T00:02:18Z";
    String time_coverage_resolution "P0DT0H4M38S";
    String time_coverage_start "2011-06-27T00:00:01Z";
    String title "CeNCOOS OAH Monitoring - NOAA West Coast Ocean Acidification (WCOA) Cruise Underway pCO2: 2011-06-27 to 2011-08-31";
    String vessel_name "NOAA Ship Bell M. Shimada";
    Float64 Westernmost_Easting -120.8827;
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

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