OPeNDAP Dataset Query Form

OPeNDAP Dataset Access Form

Action:
Data URL:

Global Attributes:	Conventions: CF-1.7 Metadata_Conventions: Unidata Dataset Discovery v1.0 cdm_data_type: Grid comment: See summary attribute creator_email: help@esa-oceancolour-cci.org creator_name: Plymouth Marine Laboratory creator_url: http://esa-oceancolour-cci.org geospatial_lat_max: 90.0 geospatial_lat_min: -90.0 geospatial_lat_resolution: .04166666666666666666 geospatial_lat_units: decimal degrees north geospatial_lon_max: 180.0 geospatial_lon_min: -180.0 geospatial_lon_resolution: .04166666666666666666 geospatial_lon_units: decimal degrees east geospatial_vertical_max: 0.0 geospatial_vertical_min: 0.0 git_commit_hash: 1898332e6ec0c2b15bdc7126194bbd777370800f institution: Plymouth Marine Laboratory keywords: satellite,observation,ocean,ocean colour keywords_vocabulary: none license: ESA CCI Data Policy: free and open access. When referencing, please use: Ocean Colour Climate Change Initiative dataset, Version <Version Number>, European Space Agency, available online at http://www.esa-oceancolour-cci.org. We would also appreciate being notified of publications so that we can list them on the project website at http://www.esa-oceancolour-cci.org/?q=publications naming_authority: uk.ac.pml number_of_bands_used_to_classify: 4 number_of_optical_water_types: 14 platform: Aqua,Envisat,Orbview-2,Sentinel-3a,Suomi-NPP processing_level: Level-3 product_version: 5.0 project: Climate Change Initiative - European Space Agency references: http://www.esa-oceancolour-cci.org/ sensor: MERIS,MODIS,OLCI,SeaWiFS,VIIRS sensors_present: MODISA OLCIa VIIRSN source: NASA SeaWiFS L1A and L2 R2018.0 LAC and GAC, MODIS-Aqua L1A and L2 R2018.0, MERIS L1B 3rd reprocessing inc OCL corrections, NASA VIIRS L1A and L2 R2018.0, OLCI L1B spatial_resolution: 4km nominal at equator standard_name_vocabulary: NetCDF Climate and Forecast (CF) Metadata Conventions Version 1.7 title: ESA CCI Ocean Colour Product summary: Data products generated by the Ocean Colour component of the European Space Agency Climate Change Initiative project. These files are 8 day composites of merged sensor (MERIS, MODIS Aqua, SeaWiFS LAC & GAC, VIIRS, OLCI) products. MODIS Aqua and SeaWiFS were band-shifted and bias-corrected to MERIS bands and values using a temporally and spatially varying scheme based on the overlap years of 2003-2007. VIIRS was band-shifted and bias-corrected in a second stage against the MODIS Rrs that had already been corrected to MERIS levels, for the overlap period 2012-2013; and at the third stage OLCI was bias corrected against already corrected MODIS, for overlap period 2016-07-01 to 2019-06-30. VIIRS, MODIS, SeaWiFS and MERIS Rrs were derived from a combination of NASA's l2gen (for basic sensor geometry corrections, etc) and HYGEOS Polymer v4.12 (for atmospheric correction). OLCI Rrs were sourced at L1b (already geometrically corrected) and processed with polymer. The Rrs were binned to a sinusoidal 4km level-3 grid, and later to 4km geographic projection, by Brockmann Consult's SNAP. Derived products were generally computed with the standard algorithmsthrough SeaDAS. QAA IOPs were derived using the standard SeaDAS algorithm but with a modified backscattering table to match that used in the bandshifting. The final chlorophyll is a combination of OCI, OCI2, OC2 and OCx, depending on the water class memberships. Uncertainty estimates were added using the fuzzy water classifier and uncertainty estimation algorithm of Tim Moore as documented in Jackson et al (2017). and updated accorsing to Jackson et al. (in prep). tracking_id: 7d50c8e9-a164-40ee-b6f4-38aea3a526b8 date_created: 20210524T172113Z time_coverage_resolution: P8D time_coverage_duration: P8525DT23H59M start_date: 19970829T000000Z stop_date: 20201231T235900Z time_coverage_start: 19970829T000000Z time_coverage_end: 20201231T235900Z history: 2021-05-24 18:21:13: The CCI Open Data Portal aggregated all files in the dataset over the time variable for OPeNDAP access. For earlier history information see the original individual files at data.cci.ceda.ac.uk netcdf_file_type: NETCDF4_CLASSIC id: esacci.OC.8-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.5-0.geographic

Variables:	lat: Array of 64 bit Reals [lat = 0..4319] lat: units: degrees_north long_name: latitude standard_name: latitude valid_min: -89.97916666666666 valid_max: 89.97916666666667 axis: Y _ChunkSizes: 270
	lon: Array of 64 bit Reals [lon = 0..8639] lon: units: degrees_east long_name: longitude standard_name: longitude valid_min: -179.97916666666666 valid_max: 179.97916666666663 axis: X _ChunkSizes: 270
	MERIS_nobs_sum: Grid time: lat: lon: long_name: Count of the number of observations from the MERIS sensor contributing to this bin cell number_of_files_composited: 8 _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	MODISA_nobs_sum: Grid time: lat: lon: number_of_files_composited: 8 _FillValue: 0.0 long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell _ChunkSizes: 1, 270, 270
	OLCI_nobs_sum: Grid time: lat: lon: number_of_files_composited: 8 long_name: Count of the number of observations from the OLCI sensor contributing to this bin cell _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	SeaWiFS_nobs_sum: Grid time: lat: lon: number_of_files_composited: 8 long_name: Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	VIIRS_nobs_sum: Grid time: lat: lon: long_name: Count of the number of observations from the VIIRS sensor contributing to this bin cell number_of_files_composited: 8 _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	chlor_a: Grid time: lat: lon: _FillValue: 9.96921E36 long_name: Chlorophyll-a concentration in seawater (not log-transformed), generated by as a blended combination of OCI, OCI2, OC2 and OCx algorithms, depending on water class memberships units: milligram m-3 ancillary_variables: chlor_a_log10_rmsd chlor_a_log10_bias grid_mapping: crs parameter_vocab_uri: http://vocab.ndg.nerc.ac.uk/term/P011/current/CHLTVOLU standard_name: mass_concentration_of_chlorophyll_a_in_sea_water units_nonstandard: mg m^-3 _ChunkSizes: 1, 270, 270
	chlor_a_log10_bias: Grid time: lat: lon: ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 comment: Uncertainty lookups derived from file: /data/datasets/CCI/v5.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_bias.dat long_name: Bias of log10-transformed chlorophyll-a concentration in seawater. grid_mapping: crs rel: uncertainty _FillValue: 9.96921E36 _ChunkSizes: 1, 270, 270
	chlor_a_log10_rmsd: Grid time: lat: lon: comment: Uncertainty lookups derived from file: /data/datasets/CCI/v5.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_rmsd.dat ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 long_name: Root-mean-square-difference of log10-transformed chlorophyll-a concentration in seawater. grid_mapping: crs rel: uncertainty _FillValue: 9.96921E36 _ChunkSizes: 1, 270, 270
	crs: Array of 32 bit Integers [time = 0..1073] time: grid_mapping_name: latitude_longitude _ChunkSizes: 1
	time: Array of 32 bit Integers [time = 0..1073] time: axis: T standard_name: time units: days since 1970-01-01 00:00:00 _ChunkSizes: 1
	total_nobs_sum: Grid time: lat: lon: long_name: Count of the total number of observations contributing to this bin cell number_of_files_composited: 8 _FillValue: 0.0 _ChunkSizes: 1, 270, 270

For questions or comments about this dataset, contact the administrator of this server [Support] at: support@ceda.ac.uk

For questions or comments about the OPeNDAP service bundled with the TDS, email THREDDS support at: support-thredds@unidata.ucar.edu

DDS:

Dataset {
    Float64 lat[lat = 4320];
    Float64 lon[lon = 8640];
    Grid {
     ARRAY:
        Float32 MERIS_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } MERIS_nobs_sum;
    Grid {
     ARRAY:
        Float32 MODISA_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } MODISA_nobs_sum;
    Grid {
     ARRAY:
        Float32 OLCI_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } OLCI_nobs_sum;
    Grid {
     ARRAY:
        Float32 SeaWiFS_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } SeaWiFS_nobs_sum;
    Grid {
     ARRAY:
        Float32 VIIRS_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } VIIRS_nobs_sum;
    Grid {
     ARRAY:
        Float32 chlor_a[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } chlor_a;
    Grid {
     ARRAY:
        Float32 chlor_a_log10_bias[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } chlor_a_log10_bias;
    Grid {
     ARRAY:
        Float32 chlor_a_log10_rmsd[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } chlor_a_log10_rmsd;
    Int32 crs[time = 1074];
    Int32 time[time = 1074];
    Grid {
     ARRAY:
        Float32 total_nobs_sum[time = 1074][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 1074];
        Float64 lat[lat = 4320];
        Float64 lon[lon = 8640];
    } total_nobs_sum;
} esacci.OC.8-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.5-0.geographic;

OPeNDAP Dataset Access Form

Action:

Data URL:

Global Attributes:

Variables:

DDS: