Dataset: ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a sinusoidal projection, Version 3.1#

Dataset identifier: esacci.OC.mon.L3S.K_490.multi-sensor.multi-platform.MERGED.3-1.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.mon.L3S.K_490.multi-sensor.multi-platform.MERGED.3-1.sinusoidal')

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	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]
kd_490	Downwelling attenuation coefficient at 490nm, derived using Lee 2005 equation and bbw from Zhang 2009 (following the SeaDAS Kd_lee algorithm)	m-1
kd_490_bias	Bias of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009	m-1
kd_490_rmsd	Root-mean-square-difference of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009	m-1
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
coordinates	lat lon
orig_data_type	float32
fill_value	0.0
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

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
coordinates	lat lon
orig_data_type	float32
fill_value	0.0
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

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
coordinates	lat lon
orig_data_type	float32
fill_value	0.0
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

VIIRS_nobs_sum#

Field	Value
long_name	Count of the number of observations from the VIIRS sensor contributing to this bin cell
coordinates	lat lon
number_of_files_composited	30
orig_data_type	float32
fill_value	0.0
size	5512708832
shape	232, 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
total_number_of_bins	23761676
number_of_latitude_rows	4320
grid_mapping_name	1D binned sinusoidal
orig_data_type	int32
fill_value	9223372036854775807
size	232
shape	232
chunk_sizes	1
file_chunk_sizes	1
data_type	int64
dimensions	time
file_dimensions	time

kd_490#

Field	Value
ancillary_variables	kd_490_rmsd kd_490_bias
coordinates	lat lon
grid_mapping	crs
long_name	Downwelling attenuation coefficient at 490nm, derived using Lee 2005 equation and bbw from Zhang 2009 (following the SeaDAS Kd_lee algorithm)
standard_name	volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
units	m-1
units_nonstandard	m^-1
parameter_vocab_uri	http://vocab.nerc.ac.uk/collection/P04/current/
orig_data_type	float32
fill_value	9.96921e+36
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

kd_490_bias#

Field	Value
coordinates	lat lon
grid_mapping	crs
long_name	Bias of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
rel	uncertainty
units	m-1
units_nonstandard	m^-1
comment	Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-production/stage09b-uncertainty_tables/kd/cci_kd_bias.dat
ref	http://www.esa-oceancolour-cci.org/?q=webfm_send/581
orig_data_type	float32
fill_value	9.96921e+36
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

kd_490_rmsd#

Field	Value
coordinates	lat lon
grid_mapping	crs
long_name	Root-mean-square-difference of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
rel	uncertainty
units	m-1
units_nonstandard	m^-1
comment	Uncertainty lookups derived from file: /data/datasets/CCI/v3.1-production/stage09b-uncertainty_tables/kd/cci_kd_rmsd.dat
ref	http://www.esa-oceancolour-cci.org/?q=webfm_send/581
orig_data_type	float32
fill_value	9.96921e+36
size	5512708832
shape	232, 23761676
chunk_sizes	1, 1048576
file_chunk_sizes	1, 1048576
data_type	float32
dimensions	time, bin_index
file_dimensions	time, bin_index

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	30
orig_data_type	float32
fill_value	0.0
size	5512708832
shape	232, 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 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 attenuation coefficient for downwelling irradiance (Kd490) gridded on a sinusoidal projection, Version 3.1
history	Source data were: ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971101-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971102-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971103-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971104-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971105-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971106-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971107-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971108-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971109-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971110-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971111-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971112-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971113-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971114-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971115-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971116-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971117-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971118-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971119-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971120-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971121-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971122-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971123-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971124-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971125-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971126-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971127-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971128-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971129-fv3.1.nc, ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1D_DAILY_4km_SIN_PML_OCx_QAA-19971130-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 1471968879 Subsetted from standardised_sine/ESACCI-OC-L3S-OC_PRODUCTS-MERGED-1M_MONTHLY_4km_SIN_PML_OCx_QAA-199711-fv3.1.nc to only include variables MERIS_nobs_sum,MODISA_nobs_sum,SeaWiFS_nobs_sum,VIIRS_nobs_sum,crs,kd_490,kd_490_bias,kd_490_rmsd,lat,lon,time,total_nobs_sum
product_version	3-1
ecv	OC
institute	Plymouth Marine Laboratory
product_string	MERGED
data_type	K_490
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 the Version 3.1 Kd490 attenuation coefficient (m-1) for downwelling irradiance product on a sinusoidal projection at approximately 4 km spatial resolution and at a number of time resolutions (daily, 5-day, 8-day and monthly composites). It is computed from the Ocean Colour CCI Version 3.1 inherent optical properties dataset at 490 nm and the solar zenith angle. Note, these data are also contained within 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	2018-06-25T17:04:08
uuid	159649796f2943689a836999016188f0
catalog_url	https://catalogue.ceda.ac.uk/uuid/159649796f2943689a836999016188f0
sensor_id	multi-sensor
platform_id	multi-platform
cci_project	OC