Dataset: ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a sinusoidal projection, Version 5.0#

Dataset identifier: esacci.OC.5-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.5-0.sinusoidal
Data store: cciodp

How to open this dataset in AVL JupyterLab  

cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.OC.5-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.5-0.sinusoidal')

Bounding box map#

Bounding box map
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 1997-09-04 to 2020-12-31
Time period 5D

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]
OLCI_nobs_sum Count of the number of observations from the OLCI 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 as a blended combination of OCI, OCI2, OC2 and OCx algorithms, 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 2
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

MODISA_nobs_sum#

Field Value
coordinates lat lon
long_name Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
number_of_files_composited 2
orig_data_type float32
fill_value 0.0
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

OLCI_nobs_sum#

Field Value
number_of_files_composited 2
long_name Count of the number of observations from the OLCI sensor contributing to this bin cell
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

SeaWiFS_nobs_sum#

Field Value
number_of_files_composited 2
coordinates lat lon
long_name Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell
orig_data_type float32
fill_value 0.0
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

VIIRS_nobs_sum#

Field Value
number_of_files_composited 2
coordinates lat lon
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 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

chlor_a#

Field Value
ancillary_variables chlor_a_log10_rmsd chlor_a_log10_bias
coordinates lat lon
grid_mapping crs
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
parameter_vocab_uri http://vocab.ndg.nerc.ac.uk/term/P011/current/CHLTVOLU
standard_name mass_concentration_of_chlorophyll_a_in_sea_water
units milligram m-3
units_nonstandard mg m^-3
orig_data_type float32
fill_value 9.96921e+36
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

chlor_a_log10_bias#

Field Value
comment Uncertainty lookups derived from file: /data/datasets/CCI/v5.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_bias.dat
coordinates lat lon
grid_mapping crs
long_name Bias of log10-transformed chlorophyll-a concentration in seawater.
ref http://www.esa-oceancolour-cci.org/?q=webfm_send/581
rel uncertainty
orig_data_type float32
fill_value 9.96921e+36
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

chlor_a_log10_rmsd#

Field Value
comment Uncertainty lookups derived from file: /data/datasets/CCI/v5.0-production/stage09b-uncertainty_tables/chlor_a/cci_chla_rmsd.dat
coordinates lat lon
grid_mapping crs
long_name Root-mean-square-difference of log10-transformed chlorophyll-a concentration in seawater.
ref http://www.esa-oceancolour-cci.org/?q=webfm_send/581
rel uncertainty
orig_data_type float32
fill_value 9.96921e+36
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

crs#

Field Value
grid_mapping_name 1D binned sinusoidal
number_of_latitude_rows 4320
total_number_of_bins 23761676
orig_data_type int32
fill_value 9223372036854775807
size 1708
shape 1708
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
coordinates lat lon
number_of_files_composited 2
orig_data_type float32
fill_value 0.0
size 40584942608
shape 1708, 23761676
chunk_sizes 1, 72900
file_chunk_sizes 1, 72900
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

Full dataset metadata#

Field Value
comment See summary attribute
processing_level L3S
product_version 5-0
project Climate Change Initiative - European Space Agency
references http://www.esa-oceancolour-cci.org/
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
title ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a sinusoidal projection, Version 5.0
history Source data were: ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19970915-fv5.0.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19970916-fv5.0.nc; netcdf_compositor_cci composites Rrs_412, Rrs_443, Rrs_490, Rrs_510, Rrs_560, Rrs_665, 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_560, atot_665, aph_412, aph_443, aph_490, aph_510, aph_560, aph_665, adg_412, adg_443, adg_490, adg_510, adg_560, adg_665, bbp_412, bbp_443, bbp_490, bbp_510, bbp_560, bbp_665, chlor_a, kd_490, Rrs_412_bias, Rrs_443_bias, Rrs_490_bias, Rrs_510_bias, Rrs_560_bias, Rrs_665_bias, chlor_a_log10_bias, aph_412_bias, aph_443_bias, aph_490_bias, aph_510_bias, aph_560_bias, aph_665_bias, adg_412_bias, adg_443_bias, adg_490_bias, adg_510_bias, adg_560_bias, adg_665_bias, kd_490_bias with --mean, Rrs_412_rmsd, Rrs_443_rmsd, Rrs_490_rmsd, Rrs_510_rmsd, Rrs_560_rmsd, Rrs_665_rmsd, chlor_a_log10_rmsd, aph_412_rmsd, aph_443_rmsd, aph_490_rmsd, aph_510_rmsd, aph_560_rmsd, aph_665_rmsd, adg_412_rmsd, adg_443_rmsd, adg_490_rmsd, adg_510_rmsd, adg_560_rmsd, adg_665_rmsd, kd_490_rmsd with --root-mean-square, and SeaWiFS_nobs, MODISA_nobs, MERIS_nobs, VIIRS_nobs, OLCI_nobs, total_nobs - with --total 1604390741 Subsetted from standardised_sine/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-5D_DAILY_4km_SIN_PML_OCx_QAA-19970913-fv5.0.nc to only include variables MERIS_nobs_sum,MODISA_nobs_sum,OLCI_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
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 5.0 chlorophyll-a product (in mg/m3) on a sinusoidal projection at 4 km spatial resolution and at a number of time resolutions (daily, 5-day, 8-day and monthly composites) covering the period 1997 - 2020. Note, the chlorophyll-a data are also included in the 'All Products' dataset. This data product is on a sinusoidal equal-area grid projection, matching the NASA standard level 3 binned projection. The default number of latitude rows is 4320, which results in a vertical bin cell size of approximately 4 km. The number of longitude columns varies according to the latitude, which permits the equal area property. Unlike the NASA format, where the bin cells that do not contain any data are omitted, the CCI format retains all cells and simply marks empty cells with a NetCDF fill value. (A separate dataset is also available for data on a geographic projection.)
publication_date 2021-05-12T13:08:47
uuid 66534da90ed44abebfc1b08adca4f9c3
catalog_url https://catalogue.ceda.ac.uk/uuid/66534da90ed44abebfc1b08adca4f9c3
sensor_id multi-sensor
platform_id multi-platform
cci_project OC