BGC-Argo float Deep Chlorophyll Maximum data combined with mesoscale eddies detection from TOEddies algorithm

Date 2020-07-26
Temporal extent 2010-05-30 -2020-07-26
Author(s) Cornec MarinORCID1, Laxenaire RémiORCID2, Speich SabrinaORCID3, Claustre HervéORCID1
Affiliation(s) 1 : Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, F-06230, Villefranche-sur-Mer, France
2 : Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee,FL 32306-2741, USA
3 : ENS, CNRS, Laboratoire de Météorologie Dynamique, LMD-IPSL, UMR 8539, Ecole Polytechnique,F-75005 Paris, France
DOI 10.17882/76733
Publisher SEANOE
Keyword(s) BioGeoChemical-Argo floats, Deep Chlorophyll Maximum, Mesoscale eddies, Global Ocean, Absolute Dynamical Topography

This dataset contains bio-optical measurements and environmental parameters associated with  Deep Chlorophyll Maxima acquired by BGC-Argo profiling floats and matched with mesoscale eddies location from the Ocean Eddy Detection and Tracking Algorithms (TOEeddies) Atlas.

For each BGC-Argo profile the data files includes the World Meteorological Organistion (WMO) and profile numbers, geographical position (LON and LAT), the date of the profile in Julian Day (JULD); the qualification of the vertical profile (CARAC_BIO) as Deep Biomass Maximum (DBM), Deep photoAcclimation Maximum (DAM), or presenting no DCM (NO); at the depth of the maximum (DCM_DEPTH), the chlorophyll a concentration (CHLA_DCM, mg chla m-3 ) and the backscattering coefficient (BBP_DCM, m-1); the Mixed Layer Depth (MLD, m), the nitracline depth (NCLINE, m), the mean daily Available PAR in the Mixed Layer Depth (MIPAR_MLD, E m -1 d -1), the daily Available PAR at the nitracline depth (IPAR_NCLINE, E m-2 d-1); the location of the profile (CARAC_EDDY) as being inside the core/periphery (IN/_EN) of a cyclonic/anticyclonic eddy (DEP_/P_), or outside eddy influence (OUT); the processing level (MODE) of the ADT maps used for the TOEddies detection, either Near Real Time (-1), or Delayed Mode (1).

The qualification and processing of the BGC-Argo profiles, as well as the DCM detection (DAM/DBM/NO) and the estimation of the environmental parameters, were applied as described from Cornec, M., Claustre, H., Mignot, A., Guidi, L., Lacour, L., Poteau, A., D’Ortenzio, F.,Gentili, B., Schmechtig, C., (to be updated.) Deep Chlorophyll Maxima in the global ocean: occurrences, drivers and characteristics. Global Biogeochemical Cycles, to be updated

Data relative to mesoscale eddies were produced by processing daily 0.25°x0.25° AVISO Absolute Dynamical Topography (maps produced by Ssalto/Duacs and distributed by Copernicus-Marine Environment Services) with the TOEddies algorithm (Laxenaire, R., Speich, S., Blanke, B., Chaigneau, A., Pegliasco, C., & Stegner, A. (2018). Anticyclonic Eddies Connecting the Western Boundaries of Indian and Atlantic Oceans. Journal of Geophysical Research: Oceans, 123(11), 7651–7677.

Licence CC-BY
Acknowledgements This study is a contribution to the following projects: remOcean (European Research Council, Grant agreement 246777); REFINE (European Research Council, Grant agreement 834177); SOCLIM (BNP Foundation); AtlantOS (European Union's Horizon 2020 research and innovation program, Grant 2014‐633211); NAOS (Agence Nationale de la Recherche, grant agreement J11R107-F); BGC-Argo-France (CNES-TOSCA). All BGC-Argo data are available at These data were collected and made freely available by the International Argo Program and the national programs that contribute to it. (, The Argo Program is part of the Global Ocean Observing System. Haili Wang is acknowledged for giving access to data from three floats in the South China Sea.The gridded altimeter products were produced by SSALTO/DUACS and distributed by the Copernicus Marine Environment Monitoring Service. The authors wish to thank the Argo Data Management team (ADMT) and the BGC-Argo Data Management team (BGC ADMT). Authors declare no conflict of interest.
Sensor metadata

The float sensors were the ECO Triplet (Three Channel Sensor; WET Labs, Inc., USA) measuring the chlorophyll-a fluorescence and the scattering of light at 700 nm and an angle of 124°).

File Size Format Processing Access
BGC_Argo_DCM_TOEddies 11 MB CSV Processed data Open access
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How to cite 

Cornec Marin, Laxenaire Rémi, Speich Sabrina, Claustre Hervé (2020). BGC-Argo float Deep Chlorophyll Maximum data combined with mesoscale eddies detection from TOEddies algorithm. SEANOE.