seanoe:76696 BERTRAND Arnaud Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France Arnaud.Bertrand@ird.fr CHAIGNEAU Alexis IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France alexis.chaigneau@ird.fr ELDIN Gérard IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France gerard.eldin@ird.fr ROUBAUT Fabrice IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France fabrice.roubaut@ird.fr GRELET Jacques IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France Jacques.Grelet@ird.fr TERNON Jean-Francois Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France Jean-Francois.Ternon@ird.fr ROUDAUT Gildas IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France Gildas.Roudaut@ird.fr LEBOURGES-DHAUSSY Anne IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France Anne.Lebourges.Dhaussy@ird.fr ROUSSELOT Pierre IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France Pierre.Rousselot@ird.fr 2026-06-26 ISO 19115:2003/19139 1.0 ABRACOS 1 cruise - Physical datasets 2024-05 2026-06-26 Bertrand Arnaud, Costa Da Silva Alex, Chaigneau Alexis, Eldin Gérard, Roubaut Fabrice, Grelet Jacques, Ternon Jean-Francois, Roudaut Gildas, Lebourges-Dhaussy Anne, Rousselot Pierre (2024). ABRACOS 1 cruise - Physical datasets. SEANOE. https://doi.org/10.17882/76696 Physical data associated with the ABRACO cruise. The ABRACOS (Acoustics along the BRAzilian COaSt) cruise aims to begin an integrated approach to monitoring the tropical marine ecosystems in the Brazilian Nordeste region in order to better understand the connectivity between the sub-systems composing it. In particular, this cruise should fill this gap and improve understanding of the degree of connectivity which exists between the oceanic islands and the continental margin in the Nordeste of Brazil, as well as within the continental platform. In this context, the main objective of the ABRACOS cruise consisted in drawing up a 3D characterization of abiotic and biotic compartments and their interactions in the Brazilian Nordeste. Specific objectives: Objective 1 - Characterization of island and coastal dynamics. Measurement of hydrological characteristics and currents (rosette, CTD, ADCP) should enable the circulation and characteristics of water masses to be described. These data will be more specifically used to study the physical connections between 1) the oceanic islands and coastal ecosystems and 2) the coast along the ocean and coastal zones. The in-situ measurements obtained will also be used to validate high resolution regional hydrodynamic models (e.g. ROMS model) which will be implemented. In-situ data acquired during the ABRACOS cruise will be supplemented by satellite data for sea surface heights (e.g. AVISO), surface temperature and chlorophyll (e.g. MODIS) and wind (e.g. ASCAT). However, it should be noted that the resolution of the products usually used and land-ocean interferences on altimetry and backscatter data will not allow these products to be used at less than 30-50 km from the coast. We will be able to partially eliminate this problem by using new "alongtrack" processing of altimetric data performed by the Center for Topographic studies of the Ocean and Hydrosphere in Toulouse. These data will be used to document the geostrophic (from sea level) ageostrophic (from wind) components of surface circulation and their variability in coastal zones. Objective 2 - Ecosystem acoustics. Acoustic tools can provide the simultaneous acquisition of quantitative and qualitative data, at different spatial-temporal scales, in numerous biotic and abiotic compartments of an ecosystem. These data can be used to characterize the ecosystem in three dimensions and directly study interactions between compartments. Active acoustics have rarely been used in tropical coastal zones. The multifrequency (38, 70, 120, and 200 kHz) acoustic data acquired during the ABRACOS cruise will be used to create an initial 3D characterization of island and coastal ecosystems in the Brazilian Nordeste region, simultaneously characterizing the seabed and water column, when possible. The French team proposing this has sound experience in the field and developed the open source 'Echopen' software in Brest (www.france-nord.ird.fr/lesressources/outils-informatiques) which can separate the various sources of acoustic echoes (e.g. zooplankton, gelatinous organisms and fish) from multifrequency acoustic data. In order to calibrate the 'Echopen Brésil' version, acoustic observations from the ABRACOS cruise must be combined with sampling using micronekton, mesopelagic and bottom trawls (Leg 2 only) and sampling of zooplankton at fixed stations (bongo and WP2 plankton nets and phytoplankton nets). To validate the 'Echopen substrat' tool we will use sampling done with bottom trawl, substrate grab and video camera observations. Objective 3 - Biodiversity and trophic structure. As indicated, acoustic observations will be complemented by in-situ sampling of planktonic, pelagic (mid-water trawls) and demersal-benthic (bottom trawl) organisms. This will involve establishing how hydrological conditions determine the vertical distribution of organisms and therefore interactions. One part of the sampled organisms will be conserved in formaldehyde then identified by taxonomists at the Federal university of Rio de Janeiro (UFRJ) to be added to Brazilian collections. The remainder of the samples will be used to obtain biological information. Along with the classic biological measurements (size, weight, sex, maturity, etc.) specimens of entire organisms (plankton) and soft tissues (muscles) will be taken in order to titrate various trophic tracers: stable isotopes of carbon, nitrogen and insofar as possible mercury. In addition, particulate organic matter (POM) will be collected by filtration (samples taken by rosette) to titrate the amounts of stable isotopes. Spatial variations in these tracers will make it possible to highlight the relative positions of these organisms in the food web and variations in food sources through the local POM signatures. Measurements of methylmercury (MeHg), a neurotoxin which accumulates in the food chain, will also be performed on part of the samples used for stable isotopes. The related projects are ABRACOS and Action Incitative IRD "DANOB". BERTRAND Arnaud Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France Arnaud.Bertrand@ird.fr COSTA DA SILVA Alex Federal University of Pernambuco, Brazil CHAIGNEAU Alexis IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France alexis.chaigneau@ird.fr ELDIN Gérard IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France gerard.eldin@ird.fr ROUBAUT Fabrice IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France fabrice.roubaut@ird.fr GRELET Jacques IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France Jacques.Grelet@ird.fr TERNON Jean-Francois Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France Jean-Francois.Ternon@ird.fr ROUDAUT Gildas IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France Gildas.Roudaut@ird.fr LEBOURGES-DHAUSSY Anne IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France Anne.Lebourges.Dhaussy@ird.fr ROUSSELOT Pierre IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France Pierre.Rousselot@ird.fr SEANOE https://www.seanoe.org/data/00655/76696/illustration.gif CTD-O2 SADCP TSG Physical oceanography Ocean Acoustics Currents Fish Fluorescence Sea surface height Sea temperature Wind Zooplankton ODATIS aggregation parameters and Essential Variable names 2025-07-29 geonetwork.thesaurus.external.theme.NVS.OD1 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 (Creative Commons - Attribution) Nutrient availability regulates the microbial biomass structure in marine oligotrophic waters 2023 Springer BITTENCOURT FARIAS GABRIEL MENDES DE CASTRO MELO PEDRO AUGUSTO LÓPEZ‑ABBATE MARIA CELESTE BERTRAND ARNAUD CARRE CLAIRE BEC BEATRICE MOLINERO JUAN-CARLOS 10.1007/s10750-023-05427-9 Surface Circulation and Vertical Structure of Upper Ocean Variability Around Fernando de Noronha Archipelago and Rocas Atoll During Spring 2015 and Fall 2017 2021 Frontiers Media SA COSTA DA SILVA ALEX CHAIGNEAU ALEXIS DOSSA ALINA N. ELDIN GERARD ARAUJO MOACYR BERTRAND ARNAUD 10.3389/fmars.2021.598101 Phytoplankton pigment data collected during the ABRACOS 1 and 2 surveys performed along the northeast Brazilian continental shelf, slope and open ocean 2026 SEANOE Farias Gabriel Bittencourt Ternon  Jean-François Hillion Sandrine Melo Pedro Augusto Mendes De Castro Carré Claire Molinero Juan-Carlos Baurand François Grelet Jacques Chaigneau  Alexis Costa Da Silva  Alex Devasa Jeremy Roubaud Fabrice Bertrand Arnaud 10.17882/95171 Nutrient data collected during the ABRACOS 1 and 2 surveys performed along the northeast Brazilian continental shelf, slope and open ocean 2026 SEANOE Farias Gabriel Bittencourt Ternon  Jean-François Hillion Sandrine Melo Pedro Augusto Mendes De Castro Carré Claire Molinero Juan-Carlos Baurand François Grelet Jacques Chaigneau  Alexis Costa Da Silva  Alex Devasa Jeremy Roubaud Fabrice Bertrand Arnaud 10.17882/95172 Abundance and biovolume of Zooplankton collected during the ABRACOS expeditions in the Tropical Western Atlantic 2026 SEANOE Melo Pedro Augusto Mendes De Castro Carré Claire Lira Simone Maria De Albuquerque Figueiredo Gabriela Guerra Araújo Abrantes Diaz Xiomara Franchesca Garcia Figueiredo Lucas Guedes Pereira Giachini Tosetto Everton Lins-Silva Nathalia Marcolin Catarina Da Rocha de Melo Junior Mauro Neumann-Leitao Sigrid Oliveira Matheus Schwamborn Ralf Simier Monique Bertrand Arnaud 10.17882/109464 Data on marine microbiome diversity collected during the ABRACOS 1 expedition in the Tropical Western Atlantic Ocean along the Northeast Brazil continental shelf, slope and open ocean 2025 SEANOE Auguet Jean-Christophe Carré Claire Costa Da Silva Alex Restrepo-Ortiz Claudia Ximena Simier Monique Ternon Jean-François Bertrand Arnaud 10.17882/109069 Dataset of demersal and deep-pelagic macroalgae, invertebrates and fishes collected during the ABRACOS expeditions in the Tropical Western Atlantic 2025 SEANOE Eduardo Leandro Nole Mincarone Michael Maia Afonso Gabriel Vinicius Felix Cocentino Adilma De Lourdes Montenegro Frédou Thierry Garcia Diaz Xiomara Lima Rayssa Siqueira Lira Alex Souza Lucena-Frédou Flávia Martins Júlia Rodrigues Melo Catarina Pinheiro Ulisses Santana Julianna De Lemos Simier Monique Soares Andrey Souza Filho Jesser Fidelis Vaske-Jr. Teodoro Villarins Bárbara Teixeira Bertrand Arnaud 10.17882/107231 Isotopic analyses realized on samples of Particular Organic Matter, Zooplankton, and demersal and deep-pelagic invertebrates and fishes collected during the ABRACOS expeditions in the Tropical Western Atlantic 2025 SEANOE Figueiredo Gabriela Guerra Araújo Abrantes Eduardo Leandro Nole Frédou Thierry Gonzalez Júlio Guazzelli Le Loc'h François Lira Alex Souza Lucena-Frédou Flávia Martins Júlia Rodrigues Melo Catarina Mincarone Michael Maia Munaron Jean-Marie Pelage Latifa Santana Julianna De Lemos Schwamborn Ralf Simier Monique Soares Andrey Souza Filho Jesser Fidelis Villarins Bárbara Teixeira Bertrand Arnaud 10.17882/108735 Nano- and Microphytoplankton diversity data collected during the ABRACOS 1 and 2 surveys performed along the Northeast Brazil continental shelf, slope and open ocean 2024 SEANOE Carré Claire Melo Pedro Augusto Mendes De Castro Cabanez Léandro Ferreira Cordeiro Isis Amália Jales Marina Cavalcanti Lacerda Sírleis Rodrigues Lira Simone Maria De Albuquerque Silva-Cunha Maria Da Glória Gonçalves Ternon Jean-Francois Simier Monique Bertrand Arnaud 10.17882/98867 ABRACOS 2 cruise. Acoustic data 2017 SEANOE Bertrand Arnaud Roudaut Gildas Lebourges-Dhaussy Anne Vargas Gary Grelet Jacques 10.17882/91135 ABRACOS 2 cruise - Physical datasets 2017 SEANOE Bertrand Arnaud Alory Gael Chaigneau Alexis Eldin Gérard Grelet Jacques Devesa Jeremy Bonnet Delphine Carre Claire Lira Alex Souza Garcia Xiomara Melo Pedro Nole Leandro Padovani Beatrice Roudaut Gildas Travassos Paulo Vargas Gary Souza Dos Santos Arthur Rousselot Pierre 10.17882/76352 Picoplankton and nanophytoplankton cytometry data collected during the ABRACOS 2 survey performed along the northeast Brazilian continental shelf, slope and open ocean 2017 SEANOE Farias Gabriel Bittencourt Ternon  Jean-François Hillion Sandrine Melo Pedro Augusto Mendes De Castro Carré Claire Molinero Juan-Carlos Baurand François Grelet Jacques Chaigneau  Alexis Costa Da Silva  Alex Devasa Jeremy Béc Beatrice Roubaud Fabrice Bertrand Arnaud 10.17882/95241 ABRACOS 1 cruise. Acoustic data 2015 SEANOE Bertrand Arnaud Roudaut Gildas Lebourges-Dhaussy Anne Vargas Gary Roubaud Fabrice 10.17882/77035 10.17600/15005600 oceans -36.0 -31.0 -9.0 -3.0 2015-09-29 2015-10-21 NC, NETCDF CSV https://www.seanoe.org/data/00655/76696/data/77842.nc WWW:DOWNLOAD-1.0-link--download Quality controlled data CTD-O2 dataset - 2 MB https://www.seanoe.org/data/00655/76696/data/77843.nc WWW:DOWNLOAD-1.0-link--download Processed data SADCP dataset - 7 MB https://www.seanoe.org/data/00655/76696/data/110613.zip WWW:DOWNLOAD-1.0-link--download Quality controlled data Meteo dataset - 487 KB https://www.seanoe.org/data/00655/76696/data/131125.nc WWW:DOWNLOAD-1.0-link--download Quality controlled data TSG dataset - 1 MB https://www.seanoe.org/data/00655/76696/data/131980.zip WWW:DOWNLOAD-1.0-link--download Quality controlled data Oxygen dataset - 6 KB https://www.seanoe.org/data/00655/76696/data/131981.zip WWW:DOWNLOAD-1.0-link--download Quality controlled data Salinity dataset - 4 KB https://cdi.seadatanet.org/search/welcome.php?query=2373&query_code={042845C5-FBE3-46E1-A93A-40AE8EC1A5B2} WWW:LINK CTD data from SeaDataNet (standardized MedAtlas, ODV and netCDF formats) https://doi.org/10.17882/76696 DOI DOI of the product https://www.seanoe.org/data/00655/76696/ rel-canonical Seanoe CTD-O2 profiles (with fluorescence, transmission and irradiance measurements), Thermosalinograph, Ship mounted ADCP OS75kHz