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Discussion papers | Copyright
https://doi.org/10.5194/os-2018-73
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Jul 2018

Research article | 11 Jul 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Ocean Science (OS).

The Mediterranean Ocean Colour Level 3 Operational Multi-Sensor Processing

Gianluca Volpe1, Simone Colella1, Vittorio Brando1, Vega Forneris1, Flavio La Padula1, Annalisa Di Cicco1, Michela Sammartino1, Marco Bracaglia1,2, Florinda Artuso3, and Rosalia Santoleri1 Gianluca Volpe et al.
  • 1Istituto di Scienze dell'Atmosfera e del Clima, Via Fosso del Cavaliere 100, 00133, Roma, Italy
  • 2Universit√† degli Studi di Napoli Parthenope,Via Amm. F. Acton 38, 80133, Naples, Italy
  • 3Ente per le Nuove tecnologie l'Energia e l'Ambiente, D ipartimento Ambiente, Centro Ricerche Frascati, Frascati, Italy

Abstract. This work describes the main processing steps operationally performed to enable single ocean colour sensors to enter the multi-sensor chain for the Mediterranean Sea of Ocean Colour Thematic Assembling Centre. Here, the multi-sensor chain takes care of reducing the inter-sensor bias before data from different sensors are merged together. The basin-scale in situ bio-optical dataset is used both to fine-tuning the algorithms for the retrieval of phytoplankton chlorophyll and attenuation coefficient of light, Kd, and to assess the uncertainty associated with them. The satellite multi-sensor remote sensing Reflectance spectra better agree with the in situ observations than that of the single sensors, and are comparable with the ESA-OC-CCI multi-sensor product, highlighting the importance of reducing the inter-sensor bias. The Mediterranean near-real-time multi-sensor processing chain has been set up and is operational in the framework of the Copernicus Marine Environment Monitoring Service.

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This work fully describes all the technical steps that are currently put in place in the context of the European Copernicus Marine Environment and Monitoring Service to make Ocean Colour data freely available to the general public. These data are useful for mapping the phytoplankton dynamics on daily and basin scale. The multi-sensor output well compares with data collected during dedicated field cruises proving that the operational product can be successfully used for environmental monitoring.
This work fully describes all the technical steps that are currently put in place in the context...
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