Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 13, issue 2
Articles | Volume 13, issue 2
https://doi.org/10.5194/essd-13-481-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-13-481-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 2
Data description paper
 | 
16 Feb 2021
Data description paper |  | 16 Feb 2021

Global maps of Forel–Ule index, hue angle and Secchi disk depth derived from 21 years of monthly ESA Ocean Colour Climate Change Initiative data

Jaime Pitarch, Marco Bellacicco, Salvatore Marullo, and Hendrik J. van der Woerd

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Short summary
Ocean monitoring is crucial to understand the regular seasonality and the drift induced by climate change. Satellites offer a possibility to monitor the complete surface of the Earth within a few days with a harmonized methodology, reaching resolutions of few kilometres. We revisit traditional ship survey optical parameters such as the Secchi disk depth and the Forel–Ule index and derive them from satellite observations. Our time series is 21 years long and has global coverage.
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