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Dataset Title: | Chlorophyll a Concentration, Aqua MODIS - 8-day, 2002-present. v.2018.0
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Institution: | NASA/GSFC OBPG (Dataset ID: aqua_chla_8d_2018_0) |
Information: | Summary ![]() ![]() ![]() |
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Attributes { time { String _CoordinateAxisType "Time"; Float64 actual_range 1.025784e+9, 1.6514064e+9; String axis "T"; String ioos_category "Time"; String long_name "Centered Time"; 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"; Float32 _FillValue NaN; Float32 actual_range -89.97917, 89.97916; String axis "Y"; String ioos_category "Location"; String long_name "Latitude"; String standard_name "latitude"; String units "degrees_north"; Float32 valid_max 90.0; Float32 valid_min -90.0; } longitude { UInt32 _ChunkSizes 8640; String _CoordinateAxisType "Lon"; Float32 _FillValue NaN; Float32 actual_range 0.0208387, 359.9792; String axis "X"; String ioos_category "Location"; String long_name "Longitude"; String standard_name "longitude"; String units "degrees_east"; Float32 valid_max 360.0; Float32 valid_min 0.0; } chlor_a { Float32 _FillValue NaN; Float64 colorBarMaximum 30.0; Float64 colorBarMinimum 0.03; String colorBarScale "Log"; String ioos_category "Ocean Color"; String long_name "Chlorophyll Concentration, OCI Algorithm"; String references "Hu, C., Lee Z., and Franz, B.A. (2012). Chlorophyll-a algorithms for oligotrophic oceans: A novel approach based on three-band reflectance difference, J. Geophys. Res., 117, C01011, doi:10.1029/2011JC007395."; String standard_name "mass_concentration_of_chlorophyll_in_sea_water"; String units "mg m-3"; Float32 valid_max 100.0; Float32 valid_min 0.001; } NC_GLOBAL { String _lastModified "2022-05-25T02:25:31.000Z"; String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.12.0,"; String cdm_data_type "Grid"; String Conventions "CF-1.6 ACDD-1.3, COARDS"; String creator_email "data@oceancolor.gsfc.nasa.gov"; String creator_name "NASA/GSFC/OBPG"; String creator_type "group"; String creator_url "https://oceandata.sci.gsfc.nasa.gov"; String date_created "2019-02-13T02:50:25Z"; Float64 Easternmost_Easting 359.9792; Float64 geospatial_lat_max 89.97916; Float64 geospatial_lat_min -89.97917; Float64 geospatial_lat_resolution 0.04166666589488307; String geospatial_lat_units "degrees_north"; Float64 geospatial_lon_max 359.9792; Float64 geospatial_lon_min 0.0208387; Float64 geospatial_lon_resolution 0.041666669903924064; String geospatial_lon_units "degrees_east"; String history "Wed May 25 07:10:28 2022: ncatted -O -a sw_point_longitude,global,o,f,0.02083333 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a geospatial_lon_min,global,o,f,0.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a geospatial_lon_max,global,o,f,360.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a easternmost_longitude,global,o,f,360.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a westernmost_longitude,global,o,f,0.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a valid_max,lon,o,f,360.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:28 2022: ncatted -O -a valid_min,lon,o,f,0.0 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:25 2022: ncap2 -O -s where(lon<0) lon=lon+360 A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc Wed May 25 07:10:23 2022: ncks -O --msa_usr_rdr -d lon,0.0,180.0 -d lon,-180.0,0.0 A20221212022128.L3m_8D_CHL_chlor_a_4km.nc A20221212022128.L3m_8D_CHL_chlor_a_4km-0-360.nc l3mapgen par=A20221212022128.L3m_8D_CHL_chlor_a_4km.nc.param 2023-10-02T20:47:30Z (local files) 2023-10-02T20:47:30Z https://oceanwatch.pifsc.noaa.gov/griddap/aqua_chla_8d_2018_0.das"; String id "A20221212022128.L3b_8D_CHL.nc/L3/A20221212022128.L3b_8D_CHL.nc"; String identifier_product_doi "10.5067/AQUA/MODIS/L3M/CHL/2018"; String identifier_product_doi_authority "https://dx.doi.org"; String infoUrl "https://oceandata.sci.gsfc.nasa.gov"; String institution "NASA/GSFC OBPG"; String instrument "MODIS"; String keywords "algorithm, aqua, biology, center, chemistry, chlor_a, chlorophyll, chlorophyllr, color, concentration, data, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Chlorophyllr, Earth Science > Oceans > Ocean Chemistry > Pigments > Chlorophyll, flight, goddard, group, gsfc, image, imaging, L3, level, level-3, mapped, mass, mass_concentration_of_chlorophyll_in_sea_water, moderate, modis, modisa, nasa, obpg, ocean, ocean color, oceans, oci, palette, pigments, processing, resolution, science, sea, seawater, smi, space, spectroradiometer, standard, water"; String keywords_vocabulary "GCMD Science Keywords"; String l2_flag_names "ATMFAIL,LAND,HILT,HISATZEN,STRAYLIGHT,CLDICE,COCCOLITH,LOWLW,CHLWARN,CHLFAIL,NAVWARN,MAXAERITER,ATMWARN,HISOLZEN,NAVFAIL,FILTER,HIGLINT"; String license "https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/"; String map_projection "Equidistant Cylindrical"; String measure "Mean"; String naming_authority "gov.nasa.gsfc.sci.oceandata"; String NCO "netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)"; Int32 nco_openmp_thread_number 1; Float64 Northernmost_Northing 89.97916; String platform "Aqua"; String processing_level "L3 Mapped"; String processing_version "2018.1QL"; String product_name "A20221212022128.L3m_8D_CHL_chlor_a_4km.nc"; String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)"; String publisher_email "data@oceancolor.gsfc.nasa.gov"; String publisher_name "NASA/GSFC/OBPG"; String publisher_type "group"; String publisher_url "https://oceandata.sci.gsfc.nasa.gov"; String sourceUrl "(local files)"; Float64 Southernmost_Northing -89.97917; String spatialResolution "4.64 km"; String standard_name_vocabulary "CF Standard Name Table v36"; String summary "Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua - 8-day Ocean Color. Chlorophyll-a Concentration. 2002 - present. spatial resolution = 4.64km"; String temporal_range "8-day"; String time_coverage_end "2022-05-01T12:00:00Z"; String time_coverage_start "2002-07-04T12:00:00Z"; String title "Chlorophyll a Concentration, Aqua MODIS - 8-day, 2002-present. v.2018.0"; Float64 Westernmost_Easting 0.0208387; } }
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.
griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2015-06-09T09:00:00Z)][(-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]).
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