Dataset: ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a sinusoidal projection, Version 4.2#

Dataset identifier: esacci.OC.day.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.4-2.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.day.L3S.CHLOR_A.multi-sensor.multi-platform.MERGED.4-2.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 1997-09-03 to 2019-12-31
Time period 1D

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 Count of the number of observations from the MERIS sensor contributing to this bin cell [none]
MODISA_nobs Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell [none]
SeaWiFS_nobs Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell [none]
VIIRS_nobs 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 Count of the total number of observations contributing to this bin cell [none]

Full variable metadata#

MERIS_nobs#

Field Value
coordinates lat lon
long_name Count of the number of observations from the MERIS sensor contributing to this bin cell
orig_data_type float32
fill_value 0.0
size 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

MODISA_nobs#

Field Value
long_name Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

SeaWiFS_nobs#

Field Value
long_name Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

VIIRS_nobs#

Field Value
long_name Count of the number of observations from the VIIRS sensor contributing to this bin cell
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
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 SeaDAS using a blended combination of OCI (OC4v6 + Hu's CI), OC3 and OC5, 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 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
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/v4.0-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 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
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/v4.0-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 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

crs#

Field Value
number_of_latitude_rows 4320
total_number_of_bins 23761676
grid_mapping_name 1D binned sinusoidal
orig_data_type int32
fill_value 9223372036854775807
size 8128
shape 8128
chunk_sizes 1
file_chunk_sizes 1
data_type int64
dimensions time
file_dimensions time

total_nobs#

Field Value
long_name Count of the total number of observations contributing to this bin cell
coordinates lat lon
orig_data_type float32
fill_value 0.0
size 193134902528
shape 8128, 23761676
chunk_sizes 1, 1048576
file_chunk_sizes 1, 1048576
data_type float32
dimensions time, bin_index
file_dimensions time, bin_index

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 sinusoidal projection, Version 4.2
history Source data were: NASA OBPG SeaWiFS level2 R2018.0 LAC and GAC [A/C via l2gen], NASA OBPG VIIRS L2 R2018.0 [A/C via l2gen], NASA OBPG MODIS Aqua L2 R2018.0 and ESA MERIS L1B (3rd reprocessing inc OCL correction) [Polymer v4.8]; Derived products were mainly produced with functions validated from the current NASA SeaDAS release and some custom implementations. Uncertainty generation determined by the fuzzy classifier scheme of Tim Moore (2009). 1579281050 Subsetted from standardised_sine/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19970909-fv4.1.nc to only include variables MERIS_nobs,MODISA_nobs,SeaWiFS_nobs,VIIRS_nobs,chlor_a,chlor_a_log10_bias,chlor_a_log10_rmsd,crs,lat,lon,time,total_nobs
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 sinusoidal projection at 4 km spatial resolution and at a number of time resolutions (daily, 5-day, 8-day and monthly composites). 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 2020-07-01T10:10:44
uuid 99348189bd33459cbd597a58c30d8d10
catalog_url https://catalogue.ceda.ac.uk/uuid/99348189bd33459cbd597a58c30d8d10
sensor_id multi-sensor
platform_id multi-platform
cci_project OC