Francis Gohin

Towards a better assessment of the ecological status of coastal waters using satellite-derived chlorophyll-a concentrations (2008)

GOHIN, Francis, SAULQUIN, Bertrand, OGER-JEANNERET, Helene, LOZAC' H, L, LAMPERT, Luis, LEFEBVRE, Alain, ...

The application of the new Water Framework Directive (WFD) of the European Union will require a dense and frequent monitoring of chlorophyll-a near the coast. Not counting the transitional water...

Seasonal variation of riverine nutrient inputs in the northern Bay of Biscay (France), and patterns of marine phytoplankton response (2008)

GUILLAUD, Jean-Francois, AMINOT, Alain, DELMAS, Daniel, GOHIN, Francis, LUNVEN, Michel, LABRY, Claire, ...

Seasonal variations in nutrient inputs are described for the main rivers (Loire and Vilaine) flowing into the northern Bay of Biscay. The river plumes are high in N/P ratio in late winter and spring,...

MARCOAST: The Water quality services two years of experiences and achievements (2008)

Viel, Monique, Garnesson, Philippe, Gohin, Francis, Hesselmans, Gerard, Krawczyk, Harald, Lange, Uwe, ...

MarCoast (Marine und Coastal Environmental Information Services)is the GMES Service Element Project (2005-2008) addressing the marine environment and is funded by the European Space Agency. MarCoast...

Satellite in support of shellfish culture (2008)

LE MOINE, Olivier, GOHIN, Francis

La surveillance de la qualité des eaux littorales assurée par l'IFREMER s'est enrichie de données satellitaires. L'IFREMER a développé un algorithme de traitement de ces données permettant...

Modelling the Karenia mikimotoi bloom that occurred in the western English Channel during summer 2003 (2008)

VANHOUTTE BRUNIER, Alice, FERNAND, L, MENESGUEN, Alain, LYONS, S, GOHIN, Francis, CUGIER, Philippe

Observations from space and in situ from the R.V Corystes 8/03 Cruise show that a massive Karenia mikimotoi bloom occured during summer 2003 in the western English Channel. Due to exceptional...

THE OCEAN AND SEA ICE SATELLITE APPLICATION FACILITY WIND PRODUCT ABSTRACT (2007)

Tilly Driesenaar, Ad Stoffelen, Siebren De Haan, John De Vries, Francis Gohin, Yves Quilfen

The ERS-1 and ERS-2 play an essential role in the development of the Ocean and Sea Ice Satellite Application Facility (OSI SAF), to become an integral part of the satellite ground segment. During the...

Typology of environmental conditions at the onset of winter phytoplankton blooms in a shallow macrotidal coastal ecosystem, Arcachon Bay (France) (2007)

Glé, Corine, Del Amo, Yolanda, Bec, Béatrice, Sautour, Benoît, Froidefond, Jean-Marie, Gohin, Francis, ...

Phytoplankton dynamics were assessed in the macrotidal ecosystem of Arcachon Bay through high-frequency surveys over a 5-year period in order to characterize typology of environmental conditions at...

Typology of environmental conditions at the onset of winter phytoplankton blooms in a shallow macrotidal coastal ecosystem, Arcachon Bay (France) (2007)

GLE, C, DEL AMO, Y, BEC, B, SAUTOUR, B, FROIDEFOND, J, GOHIN, Francis, ...

Phytoplankton dynamics were assessed in the macrotidal ecosystem of Arcachon Bay through high-frequency surveys over a 5-year period in order to characterize typology of environmental conditions at...

Use of SeaWiFS data for light availability and parameter estimation of a phytoplankton production model of the Bay of Biscay (2007)

HURET, Martin, GOHIN, Francis, DELMAS, Daniel, LUNVEN, Michel, GARCON, Véronique

Processing SeaWiFS (Sea-viewing Wide Field-of-view Sensor) data provides useful information for the observation and modelling of the phytoplankton production of the Bay of Biscay. Empirical...

Two- or three-layered box-models versus fine 3D models for coastal ecological modelling? A comparative study in the English Channel (Western Europe) (2007)

MENESGUEN, Alain, CUGIER, Philippe, LOYER, Sophie, VANHOUTTE BRUNIER, Alice, HOCH, Thierry, GUILLAUD, Jean-Francois, ...

The general trend in ecosystem modelling is to improve the spatial resolution by shifting from rough box-models to fine 3D models. Despite the continuous speeding-up of computing, 3D models involving...

Observation and modelling of natural retention structures in the English Channel (2006)

MENESGUEN, Alain, GOHIN, Francis

Accumulation of heat, or dissolved substances (nutrients, pollutants, etc.), or fine suspended particles in a water body is a key process in the functioning of aquatic ecosystems and their resistance...

Possibilities to prevent Crassostrea gigas oyster summer mortality in France (2006)

SAMAIN, Jean-Francois, ROPERT, Michel, BEDIER, Edouard, SOLETCHNIK, Patrick, MAZURIE, Joseph, LE COZ, Florence, ...

Summer mortality has been reported in the Pacific oyster, Crassostrea gigas, for many years in Japan, US and Europe. It affects both adults and juveniles and the causes of this phenomenon are...

Scaling of coastal phytoplankton features by optical remote sensors: comparison with a regional ecosystem model (2005)

DRUON, Jean-Noel, LOYER, S, GOHIN, Francis

Different scales of hydrological and biological patterns of the Bay of Biscay are assessed using space-borne and airborne optical remote sensing data, field measurements and a 3-dimensional...

Satellite-derived parameters for biological modelling in coastal waters: Illustration over the eastern continental shelf of the Bay of Biscay (2005)

GOHIN, Francis, LOYER, S, LUNVEN, Michel, LABRY, Claire, FROIDEFOND, J, DELMAS, Daniel, ...

In biological modelling of the coastal phytoplankton dynamics, the light attenuation coefficient is often expressed as a function of the concentrations of chlorophyll and mineral suspended...

Satellite and in situ observations of a late winter phytoplankton bloom, in the northern Bay of Biscay (2003)

GOHIN, Francis, LAMPERT, Luis, GUILLAUD, Jean-Francois, HERBLAND, Alain, NEZAN, Elisabeth

A phytoplankton bloom was observed in late winter 2000, on the continental shelf offshore of southern Brittany, in northwestern Bay of Biscay. This bloom appeared initially along the 120-m isobath,...

Estimation of a natural stock of scallop Pecten maximus by a method combining dredging and diving. Processing of the results by a geostatistical method (1985)

BUESTEL, Dominique, DAO, Jean-Claude, GOHIN, Francis

L'efficacité des dragues de pêche de la baie de Saint Brieuc en Bretagne a été déterminée grâce à la plongée dans les traces laissées sur le fond. Les résultats qui concernent...