Articles | Volume 13, issue 2
Earth Syst. Sci. Data, 13, 481–490, 2021
https://doi.org/10.5194/essd-13-481-2021
Earth Syst. Sci. Data, 13, 481–490, 2021
https://doi.org/10.5194/essd-13-481-2021

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 et al.

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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.