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| Registros recuperados: 82 | |
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| Loubersac, Lionel. |
| This text, published in the magazine “Challenge. Le magazine du Pacifique” deals with the quite unique Caledonian case as far as its maritime character is concerned and is part of a related research programme of the French Institute for the Sea (IFM) on the issue: “11.000.000 square kilometres, what for?” To better address this question, an analysis grid sets the stage with regard to six main issues: legal status; parties involved; characteristics of natural habitats; safety and hazards; patterns of development and operational procedures; protection policies and tools. We deal below with the basic elements relative to the sixth of these points: policies and tools of the environmental protection in New Caledonia. Il reminds the history gradually established... |
| Tipo: Text |
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| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00444/55567/57179.pdf |
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| Chenon, Felix; Loubersac, Lionel; Varet, Hervé. |
| Once the specific geographical context of French Polynesia and its needs about the use of results od Remote Sensing and Geographic Information have been presented and situated, the strategy used and developped both by the territory of French Polynesia and Ifremer in partnership is introduced. It comprises four parts and tries, by involving directly the end users, to make known the use of data of the high technology tools represneted bu Space Remote Sensing and Geographic Information Systems. Several types of the products are proposed and regional extrapolation plans are offered consequently. |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00143/25437/23590.pdf |
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| Durand, H.; Guillaumont, Brigitte; Loarer, Ronan; Loubersac, Lionel; Heral, Maurice; Prou, Jean. |
| The Charente Maritime coast, in central western France, is the most important area for oyster and mussel production in Europe. High density, in this restricted intertidal area, induces low growing rate and socio-economic difficulties. One of the possible solutions is to shift some oysters from intertidal area to submerged areas. Bathymetry, sedimentology, hydrodynamism, fisheries and administrative rules are some conditions which are considered to establish the better selection of potential zone. The successive steps of setting up the prototype of GIS are presented: digitized traditional data from charts, extracted data from grid models (hydrodynmaic model), merging of thematic covers, proposal of favorable areas. The results are discussed especially on... |
| Tipo: Text |
Palavras-chave: GIS; Modelisation; Bathymetry; Sedimentology; Hydrodynamism; Marennes Oleron. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00017/12784/9725.pdf |
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| Loubersac, Lionel; Viollier, Michel; Lemasson, Claire. |
| Spectral signatures of the same tropical salt marsh targets, adquired on the ground (Sept 20th 1986) and from altitude (helicopter survey sept 17th 1986) with three looking angles are compared to the SPOT HRV data of sept. 18th 1986 and correlated to some physical properties of the barren salt flats. Those observations give coherent results but, on dense vegetation the satellite response appears under estimated when, on barren flats, it appears over estimated. An atmospheric environmental effect explanation is proposed. Significant correlation between vegetation and brightness and humidity indexes and organic matter of soils are found. |
| Tipo: Text |
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| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00144/25518/23661.pdf |
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| Loubersac, Lionel. |
| This report was drafted in the context of obtaining of the engineering degree of the National Engineering School on Water and Environment of Strasbourg (ENGEES eg. ENITRTS), and during the cycle of training in photo-interpretation of the graduate school of the Oil and Engines (ENSPM), Direction of Fuels, French Petroleum by benefiting from a training grant of the CNEXO. After a reminder, in first part, of the physical bases in Photometry and generalities on Radiometry, the second part is dedicated to the aerospace vectors and to the various sensors, in particular exploited within the framework of the study: the satellite ERTS1 and the sensor RBV, the space laboratory SKYLAB and its multispectral camera, the satellite NOOA2 and its sensors VHRR, finally the... |
| Tipo: Text |
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| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00189/30013/28494.pdf |
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| Minghelli Roman, Audrey; Polidori, Laurent; Mathieu-blanc, Sandrine; Loubersac, Lionel; Cauneau, François. |
| Bathymetric estimation using remote sensing images has previously been applied to high spatial resolution imagery such as CASI, Ikonos, or SPOT but not on medium spatial resolution images (i.e., MERIS). This choice can be justified when there is a need to map the bathymetry on large areas. In this letter, we present the results of the bathymetry estimation over a large known area, the Gulf of Lion (France), expanding over 270 x 180 km. |
| Tipo: Text |
Palavras-chave: MERIS; Coastal zone; Bathymetry. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2597.pdf |
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| Loubersac, Lionel. |
| The present report synthesizes the results of the works led in collaboration between the IFREMER, the Hydrographic and Oceanographic service of the French Navy (Oceanographic Mission of the Pacific) and the Departments of the Sea and Fish farming and of the Management and Town planning of the Territory of the French Polynesia. After a reminder of the problems regarding morphological and hydrographic mapping of low islands (atolls) of the Pacific in particular in French Polynesia, a paragraph draws up the assets of the aerial and spatial images as well as the computer-assisted digital mapping. A chapter of the report is then dedicated to the data, to the digital processing methodologies and to the display of the results. The following one develops the... |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00195/30644/29099.pdf |
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| Barrtlet, Darius; Fowler, Cindy; Longhorn, Roger; Cuq, François; Loubersac, Lionel. |
| The final session of CoastGIS'99 took the form of a panel discussion, led and chaired by Darius Barrlett with contributions From Cindy Fowler, Roger Longhorn, Francois Cuq, Ron Furness ancl Lionel Loubersac. This was followed by a wider discussion of topics and issues raised, and included several interventions and commentaries from the floor. What follows is an edited transcript of the main points raised. While based on the verbal contributions from those named, editorial responsibility rests entirely with the session chair. |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00191/30235/28658.pdf |
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| Loubersac, Lionel; Lazure, Pascal; Dumas, Franck; Le Roux, Jean-francois; Riou, Philippe; Foucher, Eric; Guillaumont, Brigitte. |
| On the morning of the 31th October 2000, the Italian chemical tanker “Ievoli Sun” sank in the central Channel. Her cargo presented a risk of contamination for the marine environment and nearby coastal environment. From the moment the sinking was announced, Ifremer decided to implement, in almost real time, tools to produce and communicate environmental data. This paper presents the solutions chosen to develop: - a Geographic Information System to prepare maps, - a series of simulations for dispersion at sea of dissolved products - a general information web site structure (see http://www.ifremer.fr/envlit/surveillance/ievoli.htm). This paper will go beyond technical presentations of methods, tools and results obtained to take a critical look at the site’s... |
| Tipo: Text |
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| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00089/20054/17695.pdf |
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| Loubersac, Lionel. |
| This paper calls back the needs of cartography of the interface between lands and sea and assesses the characteristics of this interface in terms of knowledge as spatial and temporal constraints. After a brief typology of the different thematic cartographies of coasts and their applications we develop the contribution of the digital high resolution satellite image and we lean on an example (inventory of aquaculture sites in inter-tropical zone) which meets the three basic needs of localization, quantification and economic planning. |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00189/29991/28439.pdf |
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| Loubersac, Lionel; Lacroix, Denis; Henocque, Yves. |
| This article calls back first of all a set of facts relative to the main stakes considering sea and ocean so much on the economic point of view, in the scientific technological and innovative fields, in the governance aspects as also in the culture and international prestige ones. Then the article synthesizes several of the elements of the European study on the blue growth, the established priorities, the results of the study and its recommendations. The case of New Caledonia is then analyzed which shows that considering the 11 economic priorities identified by the European Union, 10 interest or may interest this ultra-marine country. A focus is proposed on a second European study which concerns the implementation of a Blue Society (Sea for Society... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00174/28505/26854.pdf |
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| Beliaeff, Benoit; Chim, Liet; Della Patrona, Luc; Goyard, Emmanuel; Herlin, Jose; Labreuche, Yannick; Walling, Emilie; Ansquer, Dominique; Brun, Pierre; Castex, Mathieu; Coatanea, Denis; Courties, Claude; De Lorgeril, Julien; Dufour, Robert; Frappier, Julie; Goarant, Cyrille; Huber, Matthias; Lemaire, Pierrette; Lemonnier, Hugues; Loubersac, Lionel; Le Roux, Frederique; Lucas, Ronan; Patrois, Jacques; Peignon, Jean-marie; Pham, Dominique; Ramage, Yannick; Soulard, Benoit; Vic, Marlene; Vourey, Elodie; Wabete, Nelly. |
| New Caledonian shrimp farming feasibility studies started in the mid-seventies. Today ca. 2000 tons of Litopenaeus stylirostris, introduced in 1978, are semi-intensively produced each year. Since fifteen years, production has been impacted by two seasonal vibriosis, the “Summer” syndrome caused by Vibrio nigripulchritudo in relation to pond bottom and water column quality, and the “Winter Syndrome” caused by Vibrio penaeicida in relation to drastic temperature drops . With the ambition of elucidating processes possibly leading to mortality outbreaks in ponds, Ifremer has been conducting a research program since 2003 under the DESANS project (2003-2006) and the present DEDUCTION project, equally funded by the South and North Provinces and by the Government... |
| Tipo: Text |
Palavras-chave: Shrimp farming; Technical and scientific support; Vibriosis; Water quality; Pathology; Ecophysiology; Genetics; Zoosanitary monitoring and procedures; Multifactorial and multidisciplinary approach. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00143/25438/23591.pdf |
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| Allain, Serge; Guillaumont, Brigitte; Le Visage, Christophe; Loubersac, Lionel; Populus, Jacques. |
| Devant la demande croissante des aménageurs du territoire, des scientifiques ou des usagers travaillant en milieu littoral, le SHOM et l'IFREMER ont mis en commun au sein d'un groupe de travail les moyens qu'ils consacrent à l'identification et la définition des « données géographiques de référence » en domaine littoral. Ce travail d'analyse est conduit à travers une démarche pragmatique croisée entre une approche par thème et une approche par application. Une grille de lecture a été construite, prenant en compte un certain nombre de paramètres tels que vocabulaire, données existantes, intérêt applicatif, cohérence et forme des produits. Une liste des données de référence issue de ces analyses a été établie. Ces données sont hiérarchisées selon deux... |
| Tipo: Text |
Palavras-chave: Données de référence numériques; Base de données; Domaine littoral; Applications; SIG. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00423/53406/54282.pdf |
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| Delmas, François; Heral, Maurice; Laplana, Ramon; Loubersac, Lionel; Prou, Jean. |
| Parmi les régions Ouest Européennes, la région Poitou Charentes se caractérise dans sa dimension économique par la présence d'activités où les cultures marines, l'agriculture et le tourisme occupent une place prédominante. Cette identité, partagée par d' autres régions, notamment atlantiques, s'appuie sur l'exploitation de la ressource hydrique et implique de plus en plus des critères de haute qualité tant vis à vis des produits finis agricoles, conchylicoles, touristiques que vis à vis de l'environnement, des paysages et des eaux. Sur cet ensemble de points la Région est dotée d'atouts indiscutables. Cependant les contraintes liées à la disponibilité de la ressource hydrique continentale comme marine et à son maintien à un bon niveau de qualité, font... |
| Tipo: Text |
Palavras-chave: Conchyliculture; Agriculture; Charente; Marennes Oléron; Transfert eau; Modèle trophique; Gestion eau. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00018/12933/9898.pdf |
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| Registros recuperados: 82 | |
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