This website uses cookies. By continuing to use this website you are agreeing to our use of cookies. 
CEDA logo

Dataset

 

ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a sinusoidal projection, Version 4.0

Update Frequency: As Needed
Latest Data Update: 2020-03-19
Status: Superseded
Online Status: ONLINE
Publication State: Published
Publication Date: 2019-11-27
Download Stats: last 12 months
Dataset Size: 10.56K Files | 1TB
This dataset has been superseded. See Latest Version here
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 4.0 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 4.0 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 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).

Please note, this dataset has been superseded. Later versions of the data are now available.

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.; Moore, T.S.; Müller, D.; Regner, P.; Steinmetz, F.; Steele, C.; Swinton, J.; Valente, A.; Zühlke, M.; Feldman, G.; Franz, B.; Frouin, R.; Werdell, J.; Platt, T. (2019): ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a sinusoidal projection, Version 4.0. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/3200894e4add4049b31f8df132c0d664/
Abbreviation: Not defined
Keywords: ESA, CCI, Ocean Colour, Sinusoidal

Details

Previous Info:

2019-11-27 This dataset forms part of the v4.0 ocean colour dataset collection that can be cited with doi:10.5285/00b5fc99f9384782976a4453… Show More 2019-11-27 This dataset forms part of the v4.0 ocean colour dataset collection that can be cited with doi:10.5285/00b5fc99f9384782976a4453b0148f49
(http://dx.doi.org/10.5285/00b5fc99f9384782976a4453b0148f49) 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 v4.0 ocean colour dataset collection that can be cited with the following DOI: 10.5285/00b5fc99f9384782976a4453b0148f49
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 in NetCDF format

Related Documents

 Lavender, S. et al, 'The Ocean Colour Climate Change Initiative',Ocean Challenge, Vol.21, No.1, 2015
 Product User Guide
 ESA Climate Change Initiative website
 ESA CCI Ocean Colour project website

Process overview

This dataset was generated by the computation detailed below.
Title

Derivation of Ocean Colour v4 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.

The v4 dataset has been created by band-shifting and bias-correcting MERIS, MODIS and VIIRS data to
match SeaWiFS data, merging the datasets and computing per-pixel uncertainty estimates.

For more information see the Ocean Colour v4 Product User Guide.
Input Description

None
Output Description

None
Software Reference

None
  • 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: SeaWiFS_nobs
  • 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
  • var_id: crs

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • standard_name: time
  • var_id: time
Coverage
Temporal Range
Start time:
1997-09-03T23:00:00
End time:
2018-12-31T23:59:59
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (30)
Publishers (1)