Data Access Form

Dataset Title:	Carbontracker CT2009 Fluxes (ct flux) [date][lat][lon], 1.0°, 2000-2001
Institution:	NOAA ESRL (Dataset ID: noaa_pmel_07ab_5ffa_a01a)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (Date, UTC)	5112	3h 0m 0s (even)

latitude (degrees_north)	180	1.0 (even)

longitude (degrees_east)	360	1.0 (even)

Grid Variables (which always also download all of the dimension variables)

fossil_imposed (imposed surface CO2 flux due to fossil fuel burning, mol m-2 s-1)

bio_flux_optimized (optimized surface CO2 flux due to terrestrial biosphere exchange, mol m-2 s-1)

ocean_flux_optimized (mol m-2 s-1)

fire_flux_imposed (imposed surface CO2 flux due to fire emissions, mol m-2 s-1)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.466902e+8, 1.001889e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date";
    String source_name "date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.5, 89.5;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -179.5, 179.5;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  fossil_imposed {
    Float64 colorBarMaximum 1.0e-5;
    Float64 colorBarMinimum -1.0e-5;
    String comment "surface_carbon_dioxide_mole_flux";
    String ioos_category "CO2";
    String long_name "imposed surface CO2 flux due to fossil fuel burning";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_carbon_dioxide_mole_flux";
    String units "mol m-2 s-1";
  }
  bio_flux_optimized {
    Float64 colorBarMaximum 1.0e-5;
    Float64 colorBarMinimum -1.0e-5;
    String comment "surface_carbon_dioxide_mole_flux";
    String ioos_category "CO2";
    String long_name "optimized surface CO2 flux due to terrestrial biosphere exchange";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_carbon_dioxide_mole_flux";
    String units "mol m-2 s-1";
  }
  ocean_flux_optimized {
    Float64 colorBarMaximum 1.0e-5;
    Float64 colorBarMinimum -1.0e-5;
    String comment "surface_carbon_dioxide_mole_flux";
    String ioos_category "CO2";
    String long_name "optimized surface CO2 flux due to air-sea exchange";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_carbon_dioxide_mole_flux";
    String units "mol m-2 s-1";
  }
  fire_flux_imposed {
    Float64 colorBarMaximum 1.0e-5;
    Float64 colorBarMinimum -1.0e-5;
    String comment "surface_carbon_dioxide_mole_flux";
    String ioos_category "CO2";
    String long_name "imposed surface CO2 flux due to fire emissions";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_carbon_dioxide_mole_flux";
    String units "mol m-2 s-1";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "carbontracker.team@noaa.gov";
    String creator_name "Carbontracker Team";
    String creator_type "group";
    String creator_url "https://www.esrl.noaa.gov/";
    String disclaimer 
"CarbonTracker is an open product of the NOAA Earth System Research 
Laboratory using data from the Global Monitoring Division greenhouse 
gas observational network and collaborating institutions.  Model results 
including figures and tabular material found on the CarbonTracker 
website may be used for non-commercial purposes without restriction,
but we request that the following acknowledgement text be included 
in documents or publications made using CarbonTracker results: 

     CarbonTracker results provided by NOAA/ESRL,
     Boulder, Colorado, USA, http://carbontracker.noaa.gov

Since we expect to continuously update the CarbonTracker product, it
is important to identify which version you are using.  To provide
accurate citation, please include the version of the CarbonTracker
release in any use of these results.

The CarbonTracker team welcomes special requests for data products not
offered by default on this website, and encourages proposals for
collaborative activities.  Contact us at carbontracker.team@noaa.gov.";
    Float64 Easternmost_Easting 179.5;
    String email "carbontracker.team@noaa.gov";
    Float64 geospatial_lat_max 89.5;
    Float64 geospatial_lat_min -89.5;
    Float64 geospatial_lat_resolution 1.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.5;
    Float64 geospatial_lon_min -179.5;
    Float64 geospatial_lon_resolution 1.0;
    String geospatial_lon_units "degrees_east";
    String history 
"Created on Mon Nov 02 2009 22:37:07 GMT
by script 'Time-stamp: <mistral.cmdl.noaa.gov:/ct/tools/R/make_flux1x1_nc.r - 31 Oct 2008 (Fri) 09:30:03 MDT>'
2025-04-15T21:10:41Z https://data.pmel.noaa.gov/pmel/thredds/dodsC/ct_flux
2025-04-15T21:10:41Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_pmel_07ab_5ffa_a01a.das";
    String id "ct_flux";
    String infoUrl "http://carbontracker.noaa.gov";
    String institution "NOAA ESRL";
    String keywords "air, air-sea, atmosphere, atmospheric, bio_flux_optimized, biosphere, burning, carbon, carbon dioxide, carbontracker, chemistry, co2, compounds, ct2009, data, dioxide, due, earth, Earth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds, Earth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds > Carbon Dioxide, Earth Science > Oceans > Ocean Chemistry > Carbon, emissions, esrl, exchange, fire, fire_flux_imposed, flux, fluxes, fossil, fossil_imposed, fuel, hydrocarbon, imposed, laboratory, latitude, longitude, mole, noaa, ocean, ocean_flux_optimized, oceans, optimized, research, science, sea, surface, surface_carbon_dioxide_mole_flux, system, terrestrial, time";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "We request that the following acknowledgement text be included in documents or publications made using CarbonTracker results: CarbonTracker results provided by NOAA/ESRL, Boulder, Colorado, USA, http://carbontracker.noaa.gov";
    Float64 Northernmost_Northing 89.5;
    String Notes "This file contains CarbonTracker surface CO2 fluxes.";
    String source "CarbonTracker release CT2009";
    String sourceUrl "https://data.pmel.noaa.gov/pmel/thredds/dodsC/ct_flux";
    Float64 Southernmost_Northing -89.5;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Carbontracker CT2009 Fluxes. NOAA Earth System Research Laboratory (ESRL) data from https://data.pmel.noaa.gov/pmel/thredds/dodsC/ct_flux.das .";
    String time_coverage_end "2001-09-30T22:30:00Z";
    String time_coverage_start "2000-01-01T01:30:00Z";
    String title "Carbontracker CT2009 Fluxes (ct flux) [date][lat][lon], 1.0°, 2000-2001";
    String url "http://carbontracker.noaa.gov";
    Float64 Westernmost_Easting -179.5;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection 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. It makes 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.

griddap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.