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Dataset

 

ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a geographic projection at 4km resolution, Version 6.0

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2023-08-01
Download Stats: last 12 months
Dataset Size: 12.57K Files | 1TB
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 6.0 Kd490 attenuation coefficient (m-1) for downwelling irradiance product on a geographic projection at approximately 4 km spatial resolution and at a number of time resolutions (daily, 5-day, 8-day, monthly and yearly composites) covering the period 1997 - 2022. It is computed from the Ocean Colour CCI Version 6.0 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 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).

Citable as:  Sathyendranath, S.; Jackson, T.; Brockmann, C.; Brotas, V.; Calton, B.; Chuprin, A.; Clements, O.; Cipollini, P.; Danne, O.; Dingle, J.; Donlon, C.; Grant, M.; Groom, S.; Krasemann, H.; Lavender, S.; Mazeran, C.; Mélin, F.; Müller, D.; Steinmetz, F.; Valente, A.; Zühlke, M.; Feldman, G.; Franz, B.; Frouin, R.; Werdell, J.; Platt, T. (2023): ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a geographic projection at 4km resolution, Version 6.0. NERC EDS Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/8ecae26f390b4938b67a97cbce3ecd8b/
Abbreviation: Not defined
Keywords: ESA, CCI, Ocean Colour, Geographic

Details

Previous Info:

2023-08-08 This dataset forms part of the v6.0, 4km resolution ocean colour dataset collection that can be cited with the following DOI: 1… Show More 2023-08-08 This dataset forms part of the v6.0, 4km resolution ocean colour dataset collection that can be cited with the following DOI: 10.5285/5011d22aae5a4671b0cbc7d05c56c4f0 Show Less

Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence(s):
https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_oc_terms_and_conditions.pdf
When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

These data were produced by the ESA Ocean Colour CCI project and provided to CEDA in the context of the ESA CCI Open Data Portal project.
This dataset forms part of the v6.0, 4km resolution ocean colour dataset collection that can be cited with the following DOI: 10.5285/5011d22aae5a4671b0cbc7d05c56c4f0
Data Quality:
Data are as provided by the Ocean Colour CCI team. For details of validation see the linked Product User Guide and documentation on the Ocean Colour CCI website (https://climate.esa.int/en/projects/ocean-colour/)
File Format:
Data are NetCDF formatted.

Related Documents

 ESA CCI Ocean Colour project website
 ESA Climate Change Initiative website
 Product User Guide

Process overview

This dataset was generated by the computation detailed below.
Title

Derivation of Ocean Colour v6 data from the ESA Climate Change Initiative Ocean Colour project (Ocean_Colour_cci)
Abstract

The ocean colour CCI has calculated ocean colour Essential Climate Variable data, using input data from various satellite instruments, as part of the ESA Climate Change Initiative program.

For more information see the Ocean Colour v6 Product User Guide.
Input Description

None
Output Description

None
Software Reference

None
  • units: m-1
  • long_name: Bias of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
  • var_id: kd_490_bias
  • long_name: Count of the number of observations from the MERIS sensor contributing to this bin cell
  • var_id: MERIS_nobs_sum
  • var_id: MODISA_nobs_sum
  • long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
  • var_id: OLCI-A_nobs_sum
  • long_name: Count of the number of observations from the OLCI (Sentinel-3a) sensor contributing to this bin cell
  • var_id: OLCI-B_nobs_sum
  • long_name: Count of the number of observations from the OLCI (Sentinel-3b) sensor contributing to this bin cell
  • var_id: SeaWiFS_nobs_sum
  • long_name: Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell
  • long_name: Count of the number of observations from the VIIRS sensor contributing to this bin cell
  • var_id: VIIRS_nobs_sum
  • long_name: Count of the total number of observations contributing to this bin cell
  • var_id: total_nobs_sum
  • units: m-1
  • long_name: Root-mean-square-difference of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
  • var_id: kd_490_rmsd
  • var_id: crs

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • var_id: lat
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • var_id: lon
  • standard_name: time
  • var_id: time
  • units: days
Coverage
Temporal Range
Start time:
1997-09-04T00:00:00
End time:
2022-12-31T23:59:59
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (26)
Publishers (1)