seanoe:109892 data@seanoe.org 2026-05-29 ISO 19115:2003/19139 1.0 Nutrient dataset from the BioSWOT-Med cruise 2025-11 2026-05-29 Joël Aude, Andrea Doglioli, Anthony Bosse, Sandra Nunige, Léa Buniak, Riccardo Martellucci, Elena Mauri, Milena Menna, Massimo Pacciaroni, Elvira Pulido-Villena (2025). Nutrient dataset from the BioSWOT-Med cruise. SEANOE. https://doi.org/10.17882/109892 The BioSWOT-Med campaign (Doglioli et al., 2023) was conducted aboard R/V L’Atalante from April 20 to May 15, 2023 in the Northwestern Mediterranean Sea, in the region of the North Balearic Front (NBF) to study interactions between fine-scale oceanic circulation and biogeochemical processes.  Three water masses were sampled across the NBF, northern ('A'), southern ('B'), and frontal ('F'). Each Lagrangian station consisted of a 24-hour sampling period following the displacement of a water parcel (Doglioli et al., 2024). Vertical profiles down to 500 m were collected every 6 hours at 06:00 ('T1'), 12:00 ('T2'), 18:00 ('T3'), and 00:00 ('T4') UTC, for a total of 28 Lagrangian stations: first between April~24-28 (A1, F1, B1), and again between May~4-7 (B2, F2, A2), with a final station in southern waters (B3) on May~12-13. B2 and B3 stations were located inside an anticyclonic eddy. Hydrological profiles were obtained using a Sea-Bird CTD, with data averaged to a 1~m vertical resolution, they include potential temperature (°C), practical salinity, fluorescence-derived chlorophyll-a (µg/L) and oxygen (µmol/kg).  Samples for nitrate + nitrite and phosphate (µM) were collected from Niskin bottles and analyzed onboard within 2-12~hours using a segmented flow analyzer (AAIII HR Seal Analytical) following (Aminot et al., 2007). Quantification limits (QL) were 0.05 µM for nitrate and 0.02 µM for phosphate. Phosphate concentrations at a nanomolar level analyses were performed in the laboratory using a high-sensitivity method combining a 1 m Liquid Waveguide Capillary Cell (LWCC) and an auto-analyzer (Zhang et al. 2002), achieving a detection limit of 0.002µM.  A BGC-Argo float (WMO: 1902605 - Provor CTS4 SUNA) equipped with a CTD and SUNA nitrate sensor was deployed near station B2 and sampled the anticyclonic eddy. To better resolve the photic and nutricline layers, the standard sampling cycle was modified to a 6-hour frequency, reaching depths of 300-400~m. The BGC-Argo float nitrate dataset spans May~2-16 and includes 55~profiles, with a 0.5 µM limit of quantification. It passed through a nitrate calibration procedure against 8 ship-made  profiles at B2 and B3. Data export in NetCDF format - Dataset at the 7 Lagrangian stations (28 vertical profiles for each variable, 4 at each station):  ‘BioSWOT-Med_LS_Date_Time.nc’ (with day, time, longitude and latitude);  ‘BioSWOT-Med_LS_Nutrients.nc’ (with nitrate, phosphate and phosphate at nanomolar level concentrations and depths);  'BioSWOT-Med_LS_CTD.nc' (with temperature in situ, practical salinity, chlorophyll-a and oxygen concentrations, photosynthetically active radiations and depth). - Dataset of the BGC-Argo float including 55 vertical profiles recorded between May 2 and 16:  'BioSWOT-Med_BGC-Argo' (with day and time, longitude, latitude; nitrate concentrations with associated depth; temperature in situ and practical salinity associated depth; chlorophyll-a concentrations with associated predepthssure; and oxygen concentrations with associated depth). Contact list  Aude Joël (aude.joel@mio.osupytheas.fr), Sandra Nunige (sandra.nunige@mio.osupytheas.fr, for ship-made nutrient dataset), Riccardo Martellucci (rmartellucci@ogs.it, for the BGC-Argo float dataset) and Andrea Doglioli (andrea.doglioli@mio.osupytheas.fr, for the BioSWOT-Med cruise). References Aminot, A., & Kérouel, R. 2007. Dosage automatique des nutriments dans les eaux marines: méthodes en flux continu. Méthodes d’analyse en milieu marin. Ifremer. Doglioli, A.M., & Gregori, G. 2023. BioSWOT-Med cruise, RV L’Atalante. doi:10.17600/18002392. Doglioli, A., Grégori, G., D’Ovidio, F., Bosse, P. E., A., Carlotti, F., Lescot, M.,. . . Waggonet, E. (2024). Bioswot med. biological applicati.ons of the satellite surface water and ocean topography in the mediterranean. ref. rapport de campagne. université aix-marseille. (doi:10.13155/100060) Zhang, J.Z., & Chi, J. 2002. Automated analysis of nanomolar concentrations of phosphate in natural waters with liquid waveguide. Environ Sci Technol., 1;36(5), 1048–53. doi: 10.1021/es011094v.   The authors thank the TOSCA program of the CNES (French Spatial Agency) which funds the BIOSWOT-AdAC project and the ANR – FRANCE (French National Research Agency) for its financial support to the BIOSWOT ANR-23-CE01-0027 project. The FOF (French Oceanographic Fleet) and, in particular, the captain Gilles Ferrand and the crew of the R/V L’Atalante are acknowledged for their precious support during the BioSWOT-Med cruise. Joël Aude Aix Marseille University, Toulon University, CNRS, IRD, Mediterranean Institute of Oceanography MIO UM110, Marseille, France. Andrea Doglioli Aix Marseille University, Toulon University, CNRS, IRD, Mediterranean Institute of Oceanography MIO UM110, Marseille, France. Anthony Bosse Aix Marseille University, Toulon University, CNRS, IRD, Mediterranean Institute of Oceanography MIO UM110, Marseille, France. Sandra Nunige Aix Marseille University, Toulon University, CNRS, IRD, Mediterranean Institute of Oceanography MIO UM110, Marseille, France. Léa Buniak Aix Marseille University, Toulon University, CNRS, IRD, Mediterranean Institute of Oceanography MIO UM110, Marseille, France. Riccardo Martellucci National Institute of Oceanography and Applied Geophysics – OGS, Sgonico (TS) Elena Mauri National Institute of Oceanography and Applied Geophysics – OGS, Sgonico (TS) Milena Menna National Institute of Oceanography and Applied Geophysics – OGS, Sgonico (TS) Massimo Pacciaroni National Institute of Oceanography and Applied Geophysics – OGS, Sgonico (TS) Elvira Pulido-Villena SEANOE https://www.seanoe.org/data/00987/109892/illustration.jpg Oligotrophic oceans nutrients nutricline fine-scale circulation ocean dynamics SWOT satellite biogeochemical processes Mediterranean Sea North Balearic Front Chemical oceanography Physical oceanography Nutrients ODATIS aggregation parameters and Essential Variable names 2025-07-29 geonetwork.thesaurus.external.theme.NVS.OD1 Chemical oceanography Physical oceanography SeaDataNet Parameter Disciplines 2025-07-29 geonetwork.thesaurus.external.parameter.NVS.P08 /Observational data/in-situ Type de jeux de donnée ODATIS 2025-12-09 geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-SA (Creative Commons - Attribution, Sharing under the same conditions) 10.1029/2025GL120726 10.13155/100060 Flow cytometry dataset from the BioSWOT-Med cruise 2026 SEANOE Oms Laurina Messié Monique Doglioli Andrea Aude Joel Karine Leblanc Maristella Berta Ludivine Grand Elvira Pulido-Villena Grégori Gérald 10.17882/111629 10.17600/18002392 oceans -3.302568 16.765137 35.38905 45.490946 2023-04-24 2023-05-16 GRD (GMT NETCDF) https://www.seanoe.org/data/00987/109892/data/123689.nc WWW:DOWNLOAD-1.0-link--download Processed data BioSWOT-Med_LS_CTD - 670 KB https://www.seanoe.org/data/00987/109892/data/123690.nc WWW:DOWNLOAD-1.0-link--download Processed data BioSWOT-Med_BGC-Argo - 221 MB https://www.seanoe.org/data/00987/109892/data/123691.nc WWW:DOWNLOAD-1.0-link--download Processed data BioSWOT-Med_LS_Nutrients - 31 KB https://www.seanoe.org/data/00987/109892/data/123692.nc WWW:DOWNLOAD-1.0-link--download Processed data BioSWOT-Med_LS_Date_Time - 10 KB https://doi.org/10.17882/109892 WWW:LINK-1.0-http--metadata-URL DOI of the product https://www.seanoe.org/data/00987/109892/ rel-canonical Seanoe