SAREDA MODIS-derived daily gridded Sargassum area coverage over the Atlantic

Daily gridded Sargassum area coverage derived from MODIS Terra and Aqua observations over the Atlantic, produced with the AFAI (Alternative Floating Algae Index)-based SAREDA (SArgassum Evolving Distribution in the Atlantic) algorithm.

Citation proposal
Jacques Descloitres Jacques Descloitres (AERIS/ICARE AERIS/ICARE ) - Léo Berline Léo Berline (MIO MIO ) - Jacques Descloitres Jacques Descloitres (AERIS/ICARE AERIS/ICARE ) (2021) . SAREDA MODIS-derived daily gridded Sargassum area coverage over the Atlantic. AERIS/ICARE - CNES/TOSCA AERIS/ICARE - CNES/TOSCA https://services.mspdata.eu:/geonetwork/srv/api/records/8fe1cdcb-f4ea-4c81-8543-50f0b39b4eca

Date ( Publication ): 2021-09-15

Date

Identifier: DOI:10.12770/8fe1cdcb-f4ea-4c81-8543-50f0b39b4eca

Credit: AERIS/ICARE - CNES/TOSCA

Custodian

AERIS/ICARE - Jacques Descloitres Jacques Descloitres

Principal investigator

MIO - Léo Berline Léo Berline

Author

MIO - Léo Berline Léo Berline

Author

AERIS/ICARE - Jacques Descloitres Jacques Descloitres

Publisher

AERIS/ICARE - CNES/TOSCA -

GeoID-Ocean - GeoID-Ocean GeoID-Ocean

Centre de données ODATIS Centre de données ODATIS ( Theme )

Others

Variables ODATIS Variables ODATIS ( Theme )

Keywords

Sargassum, seaweed, macroalgae

Type de jeux de donnée ODATIS Type de jeux de donnée ODATIS ( Theme )

/Remote sensing
,
/Processed data/Composite products

Thèmatiques ODATIS Thèmatiques ODATIS ( Theme )

Added-value products

Processing level Processing level ( processing-level )

Agreed Parameter Groups (P03) Agreed Parameter Groups (P03) ( parameter )

Use limitation

Access constraints: Restricted

Use constraints: Other restrictions

Other constraints

Access to the dataset is available upon registration:

https://www.icare.univ-lille.fr/register/

The conditions of use are specified on the page :

https://www.icare.univ-lille.fr/data-policy/?policy=sareda

Spatial representation type: Grid

Metadata language: French

Character set: UTF8

Topic category

Oceans

Geometric object type: Complex

Distribution format

NetCDF
(
CF
)

-

OnLine resource

DOI of the dataset Sargassum

Hierarchy level: Dataset

Statement

The SAREDA (SArgassum Evolving Distribution in the Atlantic) algorithm performs a contextual detection of Sargassum using the Alternative Floating Algae Index (AFAI) (Wang and Hu, 2016). The AFAI deviation with respect to the local background is used to retrieve the Sargassum area coverage, i.e. the fraction of MODIS pixels covered with Sargassum. Daily gridded 1km and 5km composites are derived from MODIS-Terra and MODIS-Aqua instantaneous retrievals.

Within the framework of the SAREDA project, supported by TOSCA-CNES and IRD, the MIO has partnered with the AERIS cluster and its ICARE data and services centre specialised in the massive exploitation of Earth observation spatial data, for the processing of data. GeoID-OCEAN contributed to the implementation of the prototype processing chain.

References :

- Minghelli et al. (2021). Estimation of Sargassum fractional coverage from MODIS and Sentinel-2 MSI satellite sensors. Submitted

- Podlejski et al. (2021). Sargassum observations from MODIS: a new method for false detection filtering. Submitted