A5035463354- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Marine and fisheries research
- Aquatic Ecosystems and Biodiversity
- Atmospheric aerosols and clouds
- Marine Biology and Ecology Research
- Climate variability and models
- Coastal and Marine Management
- Underwater Acoustics Research
- Atmospheric chemistry and aerosols
- Marine Bivalve and Aquaculture Studies
- Aeolian processes and effects
- Marine and Offshore Engineering Studies
- Ocean Acidification Effects and Responses
- Geology and Paleoclimatology Research
- Coral and Marine Ecosystems Studies
- Ocean Waves and Remote Sensing
- Fish Ecology and Management Studies
- Underwater Vehicles and Communication Systems
- Meteorological Phenomena and Simulations
- Geological formations and processes
- Advanced Computational Techniques and Applications
- Marine animal studies overview
- Coastal wetland ecosystem dynamics
- Geological and Geophysical Studies
Laboratory for Ocean Physics and Satellite Remote Sensing
2015-2024
Laboratoire d’Études en Géophysique et Océanographie Spatiales
1999-2024
Université de Bretagne Occidentale
2012-2024
Institut de Recherche pour le Développement
2015-2024
Centre National de la Recherche Scientifique
2013-2024
Ifremer
2013-2023
Institut Universitaire Européen de la Mer
2017-2023
Cheikh Anta Diop University
2016-2023
Laboratoire de Physico-Chimie de l'Atmosphère
2016-2018
Institut Océanographique
2008-2015
Abstract Ocean warming can modify the ecophysiology and distribution of marine organisms, relationships between species, with nonlinear interactions ecosystem components potentially resulting in trophic amplification. Trophic amplification (or attenuation) describe propagation a hydroclimatic signal up food web, causing magnification depression) biomass values along one or more pathways. We have employed 3‐D coupled physical‐biogeochemical models to explore responses climate change focus on...
Abstract It is common in meteorological applications of variational assimilation to specify the error covariances model background state implicitly via a transformation from space where variables are highly correlated control can be considered approximately uncorrelated. An important part this balance operator which effectively establishes multivariate component covariances. The use technique ocean data less common. This paper describes that used variable for oceanographic three‐ and...
Abstract. The Eastern Boundary Upwelling Systems (EBUS) contribute to one fifth of the global catches in ocean. Often associated with Oxygen Minimum Zones (OMZs), EBUS represent key regions for oceanic nitrogen (N) cycle. Important bioavailable N loss due denitrification and anammox processes as well greenhouse gas emissions (e.g, N2O) occur also these EBUS. However, their dynamics are currently crudely represented models. In climate change context, improving our capability properly areas is...
Small pelagic fish (SPF) species are heavily exploited in eastern boundary upwelling systems (EBUS) as their transformation products increasingly used the world's food chain. Management relies on regular monitoring, but there is a lack of robust theories for emergence populations' traits and evolution highly variable environments. This work aims to address existing knowledge gaps by combining physical biogeochemical modelling with an individual life-cycle based model applied round sardinella...
Abstract Senegal is the southern tip of Canary upwelling system. Its coastal ocean hosts an center which shapes sea surface temperatures between latitudes 12° and 15°N. Near this latter latitude, Cape Verde headland a sudden change in shelf cross‐shore profile are major sources heterogeneity sector (SSUS). SSUS dynamics investigated by means Regional Ocean Modeling System simulations. Configuration realism resolution (Δ x ≈ 2 km) sufficient to reproduce frontal Our main focus on 3‐D...
In West Africa, as in many other estuaries, enormous volumes of marine water are entering the continent. Fresh discharge is very low, and it commonly strongly linked to rainfall level. Some these estuaries inverse estuaries. During Great Sahelian Drought (1968–1993), their hyperhaline feature was exacerbated. This paper aims describe evolution two main African those Saloum River Casamance River, since end drought. Water salinity measurements were carried out over three five years according...
A three‐dimensional primitive equation model, the Regional Ocean Modeling Systems (ROMS), coupled to two biogeochemical configurations (NPZD and N 2 P Z D ) was used study dynamics of first trophic levels pelagic food web in southern Benguela upwelling system. The domain extends from Agulhas Bank bordered by Current 27°S on west coast South Africa. circulation is driven monthly climatologies atmospheric forcing fields. NPZD ecosystem model consists four state variables: nutrient (nitrate),...
Abstract. Eastern boundary upwelling systems (EBUS) are regions of high primary production often associated with oxygen minimum zones (OMZs). They represent key for the oceanic nitrogen (N) cycle. By exporting organic matter (OM) and nutrients produced in coastal region to open ocean, EBUS can play an important role sustaining subtropical gyres. However, losses fixed inorganic N through denitrification anammox processes take place depleted environments such as EBUS, potentially mitigate...
Abstract Upwelling off southern Senegal and Gambia takes place over a wide shelf with large area where depths are shallower than 20 m. This results in typical upwelling patterns that distinct (e.g., more persistent time aligned alongshore) from those of other better known systems, including Oregon Peru inner shelves comparatively narrow. Synoptic to superinertial variability this center is captured through 4-week intensive field campaign, representing the most comprehensive measurements...
Abstract. A comparative box analysis based on a multi-decadal physical–biogeochemical hindcast simulation (1980–2009) was conducted to characterize the drivers of spatial distribution phytoplankton biomass and production in north-west (NW) African upwelling system. Alongshore geostrophic flow related large-scale circulation patterns associated with influence coastal topography is suggested modulate divergence, then response nutrient wind forcing. In our simulation, this translates into...
Abstract Sardinella aurit a is the most abundant small pelagic fish in Senegalese–Mauritanian region. The success of its reproduction crucially depends on local circulation as this determines whether larvae reach coastal nursery areas favorable to their survival or are dispersed into open ocean. As first step towards evaluating sardinella vulnerability climate‐driven hydrodynamical changes, study aims at underpinning how transport pathways drive optimal spatial and seasonal patterns for...
Subseasonal variability of Sea Surface Temperature (SST) in the central Benguela upwelling system is investigated using TMI satellite‐derived data over period 1999–2009. Spatial patterns and time‐frequency characteristics subseasonal are documented based on Empirical Orthogonal Functions (EOF) decomposition wavelet analysis. Despite land contamination satellite within approximately 100 km off coast first EOF SST anomalies allows characterizing coastal at scale. Two regimes evidenced: a...
Abstract. The impact of desert aerosols on climate, atmospheric processes, and the environment is still debated in scientific community. extent their influence remains to be determined particularly requires a better understanding variability distribution. In this work, we studied these western Africa using different types satellite observations. SeaWiFS (Sea-Viewing Wide Field-of-View Sensor) OMI (Ozone Monitoring Instrument) data have been used characterize spatial distribution mineral from...
The scientific partnership between Senegal and France on Climate issues entered a new phase in the early 2010s, largely supported by French national research institute sustainable development (IRD). This collaboration has given rise to joint international laboratory (ECLAIRS: Études intégrées du climat et de l'océan en Afrique l’ouest réponses aux changements globaux au Sénégal), which aims foster support West African climate ocean. Research capacity building are at heart of this...
Small pelagic fish (SPF) largely dominate landings in the eastern boundary upwelling ecosystems (EBUEs). Like other major EBUEs, Canary system, which governs habitat of sardinella, dominant species off Mauritania and Senegal, is a particularly dynamic productive system. What sets it apart from EBUEs food security provides throughout sub-region, with sardinella being consumed well beyond coastal regions. However, this threatened both by accelerating global changes recent value chain. Although...
Addressing hydrological, biogeochemical and biological variability in marine systems at different scales is essential for understanding their functioning fate the context of global change increasing anthropogenic pressure. Sub-mesoscale features processes are particularly relevant coastal, marginal shelf seas, frontal (such as Regions Of Freshwater Influence, tidal fronts, upwelling eddies), being sensitive to extreme events influencing human health, economy, well-being. Phytoplankton...