Dataset: ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a geographic projection, Version 4.2#
Dataset identifier: esacci.OC.mon.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.4-2.geographic
Data store: cciodp
How to open this dataset in AVL JupyterLab
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.OC.mon.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.4-2.geographic')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.OC.mon.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.4-2.geographic')
Map tiles and data from OpenStreetMap, under the ODbL.
Basic information#
| Parameter | Value |
|---|---|
| Bounding box longitude (°) | -180.0 to 180.0 |
| Bounding box latitude (°) | -90.0 to 90.0 |
| Time range | 1997-09-03 to 2019-12-31 |
| Time period | 1M |
Click here for full dataset metadata.
Variable list#
Click on a variable name to jump to the variable’s full metadata.
| Variable | Long name | Units |
|---|---|---|
| MERIS_nobs_sum | Count of the number of observations from the MERIS sensor contributing to this bin cell | [none] |
| MODISA_nobs_sum | Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell | [none] |
| SeaWiFS_nobs_sum | Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell | [none] |
| VIIRS_nobs_sum | Count of the number of observations from the VIIRS sensor contributing to this bin cell | [none] |
| chlor_a | Chlorophyll-a concentration in seawater (not log-transformed), generated by SeaDAS using a blended combination of OCI (OC4v6 + Hu's CI), OC3 and OC5, depending on water class memberships | milligram m-3 |
| chlor_a_log10_bias | Bias of log10-transformed chlorophyll-a concentration in seawater. | [none] |
| chlor_a_log10_rmsd | Root-mean-square-difference of log10-transformed chlorophyll-a concentration in seawater. | [none] |
| total_nobs_sum | Count of the total number of observations contributing to this bin cell | [none] |
Full variable metadata#
MERIS_nobs_sum#
| Field | Value |
|---|---|
| long_name | Count of the number of observations from the MERIS sensor contributing to this bin cell |
| number_of_files_composited | 30 |
| orig_data_type | float32 |
| fill_value | 0.0 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
MODISA_nobs_sum#
| Field | Value |
|---|---|
| long_name | Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell |
| number_of_files_composited | 30 |
| orig_data_type | float32 |
| fill_value | 0.0 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
SeaWiFS_nobs_sum#
| Field | Value |
|---|---|
| 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 |
| orig_data_type | float32 |
| fill_value | 0.0 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
VIIRS_nobs_sum#
| Field | Value |
|---|---|
| number_of_files_composited | 30 |
| long_name | Count of the number of observations from the VIIRS sensor contributing to this bin cell |
| orig_data_type | float32 |
| fill_value | 0.0 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
chlor_a#
| Field | Value |
|---|---|
| long_name | Chlorophyll-a concentration in seawater (not log-transformed), generated by SeaDAS using a blended combination of OCI (OC4v6 + Hu's CI), OC3 and OC5, 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 |
| orig_data_type | float32 |
| fill_value | 9.96921e+36 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
chlor_a_log10_bias#
| Field | Value |
|---|---|
| ref | http://www.esa-oceancolour-cci.org/?q=webfm_send/581 |
| rel | uncertainty |
| comment | Uncertainty lookups derived from file: /data/datasets/CCI/v4.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_bias.dat |
| long_name | Bias of log10-transformed chlorophyll-a concentration in seawater. |
| grid_mapping | crs |
| orig_data_type | float32 |
| fill_value | 9.96921e+36 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
chlor_a_log10_rmsd#
| Field | Value |
|---|---|
| ref | http://www.esa-oceancolour-cci.org/?q=webfm_send/581 |
| rel | uncertainty |
| comment | Uncertainty lookups derived from file: /data/datasets/CCI/v4.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_rmsd.dat |
| long_name | Root-mean-square-difference of log10-transformed chlorophyll-a concentration in seawater. |
| grid_mapping | crs |
| orig_data_type | float32 |
| fill_value | 9.96921e+36 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
crs#
| Field | Value |
|---|---|
| grid_mapping_name | latitude_longitude |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 268 |
| shape | 268 |
| chunk_sizes | 1 |
| file_chunk_sizes | 1 |
| data_type | int64 |
| dimensions | time |
| file_dimensions | time |
total_nobs_sum#
| Field | Value |
|---|---|
| long_name | Count of the total number of observations contributing to this bin cell |
| number_of_files_composited | 30 |
| orig_data_type | float32 |
| fill_value | 0.0 |
| size | 10003046400 |
| shape | 268, 4320, 8640 |
| chunk_sizes | 1, 270, 270 |
| file_chunk_sizes | 1, 270, 270 |
| data_type | float32 |
| dimensions | time, lat, lon |
| file_dimensions | time, lat, lon |
Full dataset metadata#
| Field | Value |
|---|---|
| comment | See summary attribute |
| processing_level | L3S |
| project | Climate Change Initiative - European Space Agency |
| references | http://www.esa-oceancolour-cci.org/ |
| 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 |
| title | ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a geographic projection, Version 4.2 |
| history | Source data were: ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971101-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971102-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971103-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971104-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971105-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971106-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971107-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971108-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971109-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971110-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971111-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971112-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971113-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971114-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971115-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971116-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971117-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971118-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971119-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971120-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971121-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971122-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971123-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971124-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971125-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971126-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971127-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971128-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971129-fv4.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19971130-fv4.1.nc; netcdf_compositor_cci composites Rrs_412, Rrs_443, Rrs_490, Rrs_510, Rrs_555, Rrs_670, water_class1, water_class2, water_class3, water_class4, water_class5, water_class6, water_class7, water_class8, water_class9, water_class10, water_class11, water_class12, water_class13, water_class14, atot_412, atot_443, atot_490, atot_510, atot_555, atot_670, aph_412, aph_443, aph_490, aph_510, aph_555, aph_670, adg_412, adg_443, adg_490, adg_510, adg_555, adg_670, bbp_412, bbp_443, bbp_490, bbp_510, bbp_555, bbp_670, chlor_a, kd_490, Rrs_412_bias, Rrs_443_bias, Rrs_490_bias, Rrs_510_bias, Rrs_555_bias, Rrs_670_bias, chlor_a_log10_bias, aph_412_bias, aph_443_bias, aph_490_bias, aph_510_bias, aph_555_bias, aph_670_bias, adg_412_bias, adg_443_bias, adg_490_bias, adg_510_bias, adg_555_bias, adg_670_bias, kd_490_bias with --mean, Rrs_412_rmsd, Rrs_443_rmsd, Rrs_490_rmsd, Rrs_510_rmsd, Rrs_555_rmsd, Rrs_670_rmsd, chlor_a_log10_rmsd, aph_412_rmsd, aph_443_rmsd, aph_490_rmsd, aph_510_rmsd, aph_555_rmsd, aph_670_rmsd, adg_412_rmsd, adg_443_rmsd, adg_490_rmsd, adg_510_rmsd, adg_555_rmsd, adg_670_rmsd, kd_490_rmsd with --root-mean-square, and SeaWiFS_nobs, MODISA_nobs, MERIS_nobs, VIIRS_nobs, total_nobs - with --total 1579727779 Subsetted from standardised_geo/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1M_MONTHLY_4km_GEO_PML_OCx_QAA-199711-fv4.1.nc to only include variables MERIS_nobs_sum,MODISA_nobs_sum,SeaWiFS_nobs_sum,VIIRS_nobs_sum,chlor_a,chlor_a_log10_bias,chlor_a_log10_rmsd,crs,lat,lon,time,total_nobs_sum |
| product_version | 4-2 |
| ecv | OC |
| institute | Plymouth Marine Laboratory |
| product_string | MERGED |
| data_type | CHLOR_A |
| abstract | The ESA Ocean Colour CCI project has produced global level 3 binned multi-sensor time-series of satellite ocean-colour data with a particular focus for use in climate studies. This dataset contains their Version 4.2 chlorophyll-a product (in mg/m3) on a geographic projection at 4 km spatial resolution and at number of time resolutions (daily, 5day, 8day and monthly composites). Note, this chlor_a data is also included in the 'All Products' dataset. This data product is on a geographic grid projection, which is a direct conversion of latitude and longitude coordinates to a rectangular grid, typically a fixed multiplier of 360x180. The netCDF files follow the CF convention for this projection with a resolution of 8640x4320. (A separate dataset is also available for data on a sinusoidal projection.) |
| publication_date | 2020-07-01T10:22:10 |
| uuid | 5400de38636d43de9808bfc0b500e863 |
| catalog_url | https://catalogue.ceda.ac.uk/uuid/5400de38636d43de9808bfc0b500e863 |
| sensor_id | multi-sensor |
| platform_id | multi-platform |
| cci_project | OC |