Dataset: ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a geographic projection, Version 3.1#

Dataset identifier: esacci.OC.8-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.3-1.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.8-days.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.3-1.geographic')

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 1997-09-03 to 2016-12-31
Time period 8D

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 6
orig_data_type float32
fill_value 0.0
size 33219072000
shape 890, 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 6
orig_data_type float32
fill_value 0.0
size 33219072000
shape 890, 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 6
orig_data_type float32
fill_value 0.0
size 33219072000
shape 890, 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 6
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 33219072000
shape 890, 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
standard_name mass_concentration_of_chlorophyll_a_in_sea_water
units_nonstandard mg m^-3
parameter_vocab_uri http://vocab.nerc.ac.uk/collection/P04/current/
orig_data_type float32
fill_value 9.96921e+36
size 33219072000
shape 890, 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
grid_mapping crs
comment Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-production/stage09b-uncertainty_tables/chlor_a/cci_chla_bias.dat
rel uncertainty
long_name Bias of log10-transformed chlorophyll-a concentration in seawater.
orig_data_type float32
fill_value 9.96921e+36
size 33219072000
shape 890, 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
comment Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-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.
rel uncertainty
grid_mapping crs
orig_data_type float32
fill_value 9.96921e+36
size 33219072000
shape 890, 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 890
shape 890
chunk_sizes 1
file_chunk_sizes 1
data_type int64
dimensions time
file_dimensions time

total_nobs_sum#

Field Value
number_of_files_composited 6
long_name Count of the total number of observations contributing to this bin cell
orig_data_type float32
fill_value 0.0
size 33219072000
shape 890, 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 R2014.0 LAC and GAC, MODIS-Aqua L1A, MERIS L1B 3rd reprocessing inc OCL corrections, NASA VIIRS L2 R2014.0.1 (data identical to R2014.0.2)
title ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a geographic projection, Version 3.1
history Source data were: ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970915-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970916-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970918-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970919-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970920-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_GEO_PML_OCx_QAA-19970921-fv3.1.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, chlor_a_log10_bias, Rrs_412_bias, Rrs_443_bias, Rrs_490_bias, Rrs_510_bias, Rrs_555_bias, Rrs_670_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, chlor_a_log10_rmsd, Rrs_412_rmsd, Rrs_443_rmsd, Rrs_490_rmsd, Rrs_510_rmsd, Rrs_555_rmsd, Rrs_670_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 1471894430 Subsetted from standardised_geo/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-8D_DAILY_4km_GEO_PML_OCx_QAA-19970914-fv3.1.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 3-1
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 3.1 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 2018-06-25T17:42:09
uuid 12d6f4bdabe144d7836b0807e65aa0e2
catalog_url https://catalogue.ceda.ac.uk/uuid/12d6f4bdabe144d7836b0807e65aa0e2
sensor_id multi-sensor
platform_id multi-platform
cci_project OC