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| Registros recuperados: 82 | |
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| Loubersac, Lionel; Dahl, Arthur; Collote, Pascal; Lemaire, Olivier; D'Ozouville, Laurent. |
| Damage from tropical cyclones can have major consequences for coral reef structure and ecology, as well as for human communities and human uses of coral reef resources. Remote sensing with high resolution multispectral satellite images can be used to asses large scale cyclone damages on coral reef areas. SPOT images of the almost atoll of AITUTAKI (Cook Islands) taken in june 1986 and february 1987 after the passage of Cyclone Sally near the island in january, were transformed and subjected to a textural analysis, and then compared to asses damage on the reefs and lagoon.New shallow sand and rubble deposits showed increased reflectance, while lower reflectance seemed associated with damage to reef structure, scouring in the lagoon, deposits of terrestrial... |
| Tipo: Text |
Palavras-chave: ICRS 6; Remote sensing; Reflectance; Stresses; Cyclones; Extreme events; Coral reef; Lagoon; Natural System; External Threats & Opportunities. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00143/25380/23518.pdf |
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| Aucan, Jérôme; Rolin, Jean-francois; Loubersac, Lionel. |
| This text calls back all the questions asked by the digital connections by submarine cables and the main stakes which emerge in the South Pacific. It develops the challenges put by the cybersecurity questions before opening the perspectives offered by the double use of these maritime connections for purposes of knowledge but also alert, monitoring as security. The text develops then the solutions which these connections authorize under two ways. First is the potential regarding "Smart Cables" authorizing the operational monitoring of long term environmental parameters in depths, as the early warnings relative to natural hazards (earthquakes, tsunamis...). Second, from now on operation, relates on the connection of seafloor and water column cabled submarine... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00384/49566/50057.pdf |
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| Loubersac, Lionel; Maraux, Sébastien; Lemsanni, Abdellah; Fiandrino, Annie; Jouan, Mathieu; Tellier, Denis; Denis, Jacques. |
| NAMIBIE (a French acronym for Integrated Multimedia Navigator Within Coastal Environment Data Bases) is a specific tool which first concept has been established by Ifremer and has been developed by an association between research in the field of coastal environment, innovation in the field of new information and communication technologies and services in the field of coastal integrated management and impact studies. The objectives of this tool is to facilitate research, direct access and display of relevant multimedia coastal integrated data and information according to an interactive, widely opened and play-full interface. The principles are based upon the fact that sustainable decision making needs an optimised understanding of coastal processes and... |
| Tipo: Text |
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| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00188/29963/28416.pdf |
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| Loubersac, Lionel. |
| This text is an abstract of the oral presentation performed on May 31st, 2018 during the annual evening of the Representative Counci of the French Overseas people (CREFOM), in the City Hall of Paris and in the invitation of the President of this Council. It approaches 5 big subjects: i) the sea: our spring, our future, ii) for a global vision and the anticipation, iii) for a big ambition, iiii) the importance of our youth, iiiii) sharing the sea. |
| Tipo: Text |
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| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00450/56146/57689.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 text, published in the work “101 words to understand Australia” (https://archimer.ifremer.fr/doc/00439/55095/) has been updated for this new edition. It describes the geography of the Coral Sea and develops the specific marine characteristics of the biodiversity and geodiversity of this semi-closed sea Considering its history, this text calls back the various migrations which authorized the installation of man in Australia and in the archipelagoes that border this sea, the main European explorations of the XVII, XVIII and XIX th centuries as well as the fact that it was the theater of a series of major air-sea battles between USA and Japan during the Second World War. A conclusion summarizes the stakes carried out by this region of the world, in... |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80262/83352.pdf |
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| Loubersac, Lionel. |
| This text, published in the 4th quarter 2020 issue of Marine and Oceans, provides an overview of the wealth of maritime spaces in New Caledonia. It addresses both the geological and mineral heritage and the renewable energy and biological resources. The text underlines the importance of exploring the deep sea, which is an essential foundation for knowledge and decision-making. It also examines the importance of promoting the maritime spaces of New Caledonia as a laboratory for maritime sustainable development based on non-intrusive and eco-responsible technological innovations. |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00667/77878/80025.pdf |
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| De Roeck, Yann-herve; Loubersac, Lionel. |
| This text presents a review of the various technologies for exploitation of renewable marine energy resources. Il exposes the solutions offered by tide and currents, swell and waves, the marine wind energy, the Ocean Thermal Energy, the osmotic energy and specifies the various degrees of technological maturity for each solution. This new economic activity on the littoral and coastal areas also contains indirect effects in terms of management which are called back. The inter-tropical islands benefit from a very vast potential for the insertion of these renewable sources of energy in their mix of energy production. Although the exploitation of these energies is not still the object of a programming in New Caledonia, an overview of the specificities of the... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00174/28504/26853.pdf |
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| Pelletier, Dominique; Mallet, Delphine; Roman, William; Loubersac, Lionel. |
| This article first draws up a balance sheet of all various implemented techniques to observe and monitor the shallow marine biodiversity. Then the article focuses on the techniques of the rotating high resolution submarine video and their implementation in New Caledonia on various sites and habitats under various management / protection policies such as Marines Protected Areas, strict marine reserves, registered sites on UNESCO world heritage or free access zones. An evaluation of these techniques and of their contributions is proposed in terms of transfer to other geographical zones, of practical feasibility in the technical, logistic and cost point of view as also are analyzed the perspectives offered by those technologies in terms of innovation, of... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00174/28506/26855.pdf |
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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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| Loubersac, Lionel. |
| This article, which is one of the components of the dedicated water file of the RJPENC number 37, deals with seawater. After an introduction it consists of 7 chapters. The first deals with its surface and its volume. The second deals with its possible origins. Chapter 3 discusses its circulation and dynamics. Chapter 4 explains why it is salty. The fifth recalls that this seawater does not contain only salt and is at the origin of different mineral formations of the seabed. The 6th deals with the energies from which it is the source and the seventh deals with the fact that it is the origin of life. A conclusion recalls some characteristics of this seawater in legal, political and economic terms |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80355/83456.pdf |
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| Populus, Jacques; Loubersac, Lionel; Prou, Jean; Kerdreux, Michel; Le Moine, Olivier. |
| The coastal zone of Charente-Maritime in France has a leading position in oyster culture production. Yet it is being jeopardized by a number of problems such as overstocking, inadequate distribution of culture types, wild stock in excess, and strong siltation processes. Some of these problems result from a lack of communication and realization within the professional community, others due to obsolete management tools. The introduction of geomatics is believed to help provide some answers, besides alleviating the classical task of lease management. This chapter shows how the system was built, the spatial data geo-referenced and linked to administrative data. Examples of queries on the spatial data base reveal some otherwise invisible facts and allow... |
| Tipo: Text |
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| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00172/28313/26594.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; Manaud, Francois; Loarer, Ronan; Kerdreux, Michel; Durand, Christophe. |
| This paper describes a method that refers to the integration of analogic data of an Atlantic salt marsh atlas into a GIS. So the steps of the method are developed after a description of the original data sources in the form of analogic thematic cartography and associated text. They include digitalization, geometric corrections, topology and attributes definition, hotlinks setting up between graphics, texts and images, information layers crossing and spatial analyses. Four main results are presented and discussed: (a) the atlas digital form presentation, (b) objects selection and theme surface computation in the case of salt exploitation, (c) salt marsh identification versus inland fresh water marshes, (d) intersection between digital atlas objects and... |
| Tipo: Text |
Palavras-chave: Salt marsh; Digital cartography; GIS; Spatial analysis.. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00191/30215/28613.pdf |
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| Loubersac, Lionel. |
| This text is the black and white version (dated version 2003) of training notes delivered to the pupils of the Master's degree SILAT, which synthesizes the training courses given every year in Paris Grignon, thanks to a session of this Master's degree dedicated to the coastal environment and uses questions. |
| Tipo: Text |
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| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00191/30236/28659.pdf |
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| Registros recuperados: 82 | |
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