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Dataset

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

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2018-06-25
Download Stats: last 12 months

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).

Citable as:  Sathyendranath, S.; Grant, M.; Brewin, R.J.W.; Brockmann, C.; Brotas, V.; Chuprin, A.; Doerffer, R.; Dowell, M.; Farman, A.; Groom, S.; Jackson, T.; Krasemann, H.; Lavender, S.; Martinez Vicente, V.; Mazeran, C.; Mélin, F.; Moore, T.S.; Müller, D.; Platt, T.; Regner, P.; Roy, S.; Steinmetz, F.; Swinton, J.; Valente, A.; Zühlke, M.; Antoine, D.; Arnone, R.; Balch, W.M.; Barker, K.; Barlow, R.; Bélanger, S.; Berthon, J.-F.; Beşiktepe, Ş.; Brando, V.E.; Canuti, E.; Chavez, F.; Claustre, H.; Crout, R.; Feldman, G.; Franz, B.; Frouin, R.; García-Soto, C.; Gibb, S.W.; Gould, R.; Hooker, S.; Kahru, M.; Klein, H.; Kratzer, S.; Loisel, H.; McKee, D.; Mitchell, B.G.; Moisan, T.; Muller-Karger, F.; O'Dowd, L.; Ondrusek, M.; Poulton, A.J.; Repecaud, M.; Smyth, T.; Sosik, H.M.; Taberner, M.; Twardowski, M.; Voss, K.; Werdell, J.; Wernand, M.; Zibordi, G. (2018): ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global attenuation coefficient for downwelling irradiance (Kd490) gridded on a sinusoidal projection, Version 3.1. Centre for Environmental Data Analysis, date of citation. http://catalogue.ceda.ac.uk/uuid/159649796f2943689a836999016188f0
Abbreviation: Not defined
Keywords: ESA, CCI, Ocean Colour, Sinusoidal

Details

Previous Info:

2018-07-04 This dataset forms part of the v3.1 ocean colour dataset collection that can be cited with doi:10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5
(http://dx.doi.org/10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5) Show Less

Previously used record identifiers:
No releated 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: http://licences.ceda.ac.uk/image/data_access_condition/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:

This data has been 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 v3.1 ocean colour dataset collection that can be cited with doi:10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5
(http://dx.doi.org/10.5285/9c334fbe6d424a708cf3c4cf0c6a53f5)

Data Quality:
CCI data format checked
File Format:
Data are in NetCDF format

Process overview

  • 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
  • units: m-1
  • names: Bias of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
  • long_name: Count of the number of observations from the MERIS sensor contributing to this bin cell
  • var_id: MERIS_nobs
  • names: Count of the number of observations from the MERIS sensor contributing to this bin cell
  • var_id: MERIS_nobs_sum
  • long_name: Count of the number of observations from the MERIS sensor contributing to this bin cell
  • names: Count of the number of observations from the MERIS sensor contributing to this bin cell
  • var_id: MODISA_nobs
  • long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
  • names: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
  • var_id: MODISA_nobs_sum
  • long_name: Count of the number of observations from the MODIS (Aqua) sensor contributing to this bin cell
  • names: 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
  • names: Count of the number of observations from the SeaWiFS (GAC and LAC) 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
  • names: Count of the number of observations from the SeaWiFS (GAC and LAC) sensor contributing to this bin cell
  • var_id: VIIRS_nobs
  • long_name: Count of the number of observations from the VIIRS sensor contributing to this bin cell
  • names: 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 number of observations from the VIIRS sensor contributing to this bin cell
  • names: Count of the number of observations from the VIIRS sensor contributing to this bin cell
  • long_name: Count of the total number of observations contributing to this bin cell
  • var_id: total_nobs
  • names: Count of the total number of observations contributing to this bin cell
  • var_id: total_nobs_sum
  • long_name: Count of the total number of observations contributing to this bin cell
  • names: Count of the total number of observations contributing to this bin cell
  • long_name: Downwelling attenuation coefficient at 490nm, derived using Lee 2005 equation and bbw from Zhang 2009 (following the SeaDAS Kd_lee algorithm)
  • units: m-1
  • standard_name: volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
  • var_id: kd_490
  • names: Downwelling attenuation coefficient at 490nm, derived using Lee 2005 equation and bbw from Zhang 2009 (following the SeaDAS Kd_lee algorithm), volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
  • 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
  • units: m-1
  • names: Root-mean-square-difference of downwelling attenuation coefficient at 490 nm derived using Lee 2005 equation and bbw from Zhang 2009
  • var_id: crs

Co-ordinate Variables

  • standard_name: latitude
  • var_id: lat
  • units: degrees_north
  • names: latitude
  • var_id: lon
  • units: degrees_east
  • standard_name: longitude
  • names: longitude
  • standard_name: time
  • var_id: time
  • names: time
Coverage
Temporal Range
Start time:
1997-09-04T00:00:00
End time:
2016-12-31T23:59:59
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°