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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 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_optical_water_types: 14 platform: Aqua,Envisat,Orbview-2,Suomi-NPP processing_level: Level-3 project: Climate Change Initiative - European Space Agency references: http://www.esa-oceancolour-cci.org/ sensor: MERIS,MODIS,SeaWiFS,VIIRS sensors_present: MODISA VIIRSN source: NASA SeaWiFS L2 R2018.0 LAC and GAC, MODIS-Aqua L2 R2018.0, MERIS L1B 3rd reprocessing inc OCL corrections, NASA VIIRS L2 R2018.0 spatial_resolution: 4km nominal at equator standard_name_vocabulary: NetCDF Climate and Forecast (CF) Metadata Conventions Version 1.6 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 monthly composites of merged sensor (MERIS, MODIS Aqua, SeaWiFS LAC & GAC, VIIRS) products. MODIS Aqua and MERIS were band-shifted and bias-corrected to SeaWiFS 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 SeaWiFS levels, for the overlap period 2012-2013. VIIRS, MODIS and SeaWiFS Rrs were derived from standard NASA L2 products; MERIS - from a combination of NASA's l2gen (for basic sensor geometry corrections, etc) and HYGEOS Polymer v4.8 (for atmospheric correction). The Rrs were binned to a sinusoidal 4km level-3 grid, and later to 4km geographic projection, by Brockmann Consult's BEAM. Derived products were generally computed with the standard SeaDAS algorithms. 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 OC4, Hu's CI and OC5, 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). date_created: 20210118T163328Z time_coverage_resolution: P1M time_coverage_duration: P8156DT23H59M start_date: 19970901T000000Z stop_date: 20191231T235900Z time_coverage_start: 19970901T000000Z time_coverage_end: 20191231T235900Z history: 2021-01-18 16:33:28: 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 product_version: 4.2 tracking_id: 73203e24-7f25-4156-b237-cf4bc9ffee0c id: esacci.OC.mon.L3S.K_490.multi-sensor.multi-platform.MERGED.4-2.geographic git_commit_hash: 85e7d70ef28f64e1c0f9b7f8212b97157a4f1278

Variables:	lat: Array of 32 bit Reals [lat = 0..4319] lat: units: degrees_north long_name: latitude standard_name: latitude valid_min: -89.979164 valid_max: 89.979164 axis: Y _ChunkSizes: 270
	lon: Array of 32 bit Reals [lon = 0..8639] lon: units: degrees_east long_name: longitude standard_name: longitude valid_min: -179.97917 valid_max: 179.97917 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: 30 _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	MODISA_nobs_sum: Grid time: lat: lon: long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell number_of_files_composited: 30 _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	SeaWiFS_nobs_sum: Grid time: lat: lon: long_name: Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell number_of_files_composited: 30 _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	VIIRS_nobs_sum: Grid time: lat: lon: number_of_files_composited: 30 long_name: Count of the number of observations from the VIIRS sensor contributing to this bin cell _FillValue: 0.0 _ChunkSizes: 1, 270, 270
	crs: Array of 32 bit Integers [time = 0..267] time: grid_mapping_name: latitude_longitude _ChunkSizes: 1
	kd_490: Grid time: lat: lon: _FillValue: 9.96921E36 long_name: Downwelling attenuation coefficient at 490nm, derived using Lee 2005 equation and bbw from Zhang 2009 (following the SeaDAS Kd_lee algorithm) units: m-1 ancillary_variables: kd_490_rmsd kd_490_bias grid_mapping: crs parameter_vocab_uri: http://vocab.ndg.nerc.ac.uk/term/P071/19/CFSN0064 standard_name: volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water units_nonstandard: m^-1 _ChunkSizes: 1, 270, 270
	kd_490_bias: Grid time: lat: lon: _FillValue: 9.96921E36 long_name: Bias of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009 units: m-1 comment: Uncertainty lookups derived from file: /data/datasets/CCI/v4.0-production/stage09b-uncertainty_tables/kd/cci_kd_bias.dat grid_mapping: crs ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 rel: uncertainty units_nonstandard: m^-1 _ChunkSizes: 1, 270, 270
	kd_490_rmsd: Grid time: lat: lon: _FillValue: 9.96921E36 long_name: Root-mean-square-difference of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009 units: m-1 comment: Uncertainty lookups derived from file: /data/datasets/CCI/v4.0-production/stage09b-uncertainty_tables/kd/cci_kd_rmsd.dat grid_mapping: crs ref: http://www.esa-oceancolour-cci.org/?q=webfm_send/581 rel: uncertainty units_nonstandard: m^-1 _ChunkSizes: 1, 270, 270
	time: Array of 32 bit Integers [time = 0..267] time: standard_name: time units: days since 1970-01-01 00:00:00 axis: T _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: 30 _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 {
    Float32 lat[lat = 4320];
    Float32 lon[lon = 8640];
    Grid {
     ARRAY:
        Float32 MERIS_nobs_sum[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } MERIS_nobs_sum;
    Grid {
     ARRAY:
        Float32 MODISA_nobs_sum[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } MODISA_nobs_sum;
    Grid {
     ARRAY:
        Float32 SeaWiFS_nobs_sum[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } SeaWiFS_nobs_sum;
    Grid {
     ARRAY:
        Float32 VIIRS_nobs_sum[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } VIIRS_nobs_sum;
    Int32 crs[time = 268];
    Grid {
     ARRAY:
        Float32 kd_490[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } kd_490;
    Grid {
     ARRAY:
        Float32 kd_490_bias[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } kd_490_bias;
    Grid {
     ARRAY:
        Float32 kd_490_rmsd[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } kd_490_rmsd;
    Int32 time[time = 268];
    Grid {
     ARRAY:
        Float32 total_nobs_sum[time = 268][lat = 4320][lon = 8640];
     MAPS:
        Int32 time[time = 268];
        Float32 lat[lat = 4320];
        Float32 lon[lon = 8640];
    } total_nobs_sum;
} esacci.OC.mon.L3S.K_490.multi-sensor.multi-platform.MERGED.4-2.geographic;

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