Catalogue PIGMA
ABRACOS 1 cruise - Physical datasets
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".
Simple
- Date (Publication)
- 2024-05
- Date (Revision)
- 2026-06-26
- Other citation details
- 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
Author
IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France
-
LEBOURGES-DHAUSSY Anne
- Theme
-
- CTD-O2
- SADCP
- TSG
- Physical oceanography
- Use limitation
- CC-BY (Creative Commons - Attribution)
- Use constraints
- Other restrictions
- Date (Publication)
- 2023
- Unique resource identifier
- 10.1007/s10750-023-05427-9
- Association Type
- Cross reference
- Initiative Type
- Study
- Date (Publication)
- 2021
- Unique resource identifier
- 10.3389/fmars.2021.598101
- Association Type
- Cross reference
- Initiative Type
- Study
- Date (Publication)
- 2026
- Unique resource identifier
- 10.17882/95171
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2026
- Unique resource identifier
- 10.17882/95172
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2026
- Unique resource identifier
- 10.17882/109464
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2025
- Unique resource identifier
- 10.17882/109069
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2025
- Unique resource identifier
- 10.17882/107231
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2025
- Unique resource identifier
- 10.17882/108735
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2024
- Unique resource identifier
- 10.17882/98867
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2017
- Unique resource identifier
- 10.17882/91135
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2017
- Unique resource identifier
- 10.17882/76352
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2017
- Unique resource identifier
- 10.17882/95241
- Association Type
- Cross reference
- Initiative Type
- dataset
- Date (Publication)
- 2015
- Unique resource identifier
- 10.17882/77035
- Association Type
- Cross reference
- Initiative Type
- dataset
- Unique resource identifier
- 10.17600/15005600
- Association Type
- Cross reference
- Initiative Type
- Platform
- Metadata language
- English
- Topic category
-
- Oceans
N
S
E
W
))
- Begin date
- 2015-09-29
- End date
- 2015-10-21
- Distribution format
-
-
NC, NETCDF
(
)
-
CSV
(
)
-
NC, NETCDF
(
)
- OnLine resource
-
Quality controlled data
(
WWW:DOWNLOAD-1.0-link--download
)
CTD-O2 dataset - 2 MB
- OnLine resource
-
Processed data
(
WWW:DOWNLOAD-1.0-link--download
)
SADCP dataset - 7 MB
- OnLine resource
-
Quality controlled data
(
WWW:DOWNLOAD-1.0-link--download
)
Meteo dataset - 487 KB
- OnLine resource
-
Quality controlled data
(
WWW:DOWNLOAD-1.0-link--download
)
TSG dataset - 1 MB
- OnLine resource
-
Quality controlled data
(
WWW:DOWNLOAD-1.0-link--download
)
Oxygen dataset - 6 KB
- OnLine resource
-
Quality controlled data
(
WWW:DOWNLOAD-1.0-link--download
)
Salinity dataset - 4 KB
- OnLine resource
- CTD data from SeaDataNet (standardized MedAtlas, ODV and netCDF formats) ( WWW:LINK )
- OnLine resource
- DOI of the product ( DOI )
- OnLine resource
- Seanoe ( rel-canonical )
- Hierarchy level
- Dataset
- Statement
- CTD-O2 profiles (with fluorescence, transmission and irradiance measurements), Thermosalinograph, Ship mounted ADCP OS75kHz
- File identifier
- seanoe:76696 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2026-06-26
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Point of contact
Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
-
BERTRAND Arnaud
Point of contact
IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France
-
CHAIGNEAU Alexis
Point of contact
IRD, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Brest, France
-
ELDIN Gérard
Point of contact
IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France
-
ROUBAUT Fabrice
Point of contact
IRD, Unité de service Instrumentation, Moyens, Analytiques, Observatoires en Géophysique et Océanographie (IMAGO), Brest, France
-
GRELET Jacques
Point of contact
Institut de Recherche pour le Développement (IRD), MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
-
TERNON Jean-Francois
Point of contact
IRD, UMR LEMAR, BP70 29280 Plouzané, FRANCE : University of Brest, France
-
ROUDAUT Gildas
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available