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Nombre de programmes trouvés : 114
Label UNT Documentaires

le (26m3s)

Dans les profondeurs du climat (2006)

L'océan austral, qui entoure le continent Antarctique, abrite le courant marin le plus puissant de la planète : le courant circumpolaire Antarctique. Ce courant est le seul lien profond entre les trois océans, Atlantique, Indien et Pacifique. Considéré comme un élément clé du système climatique global, il joue un rôle primordial dans les échanges de propriétés entre les océans (sel, chaleur,...). En janvier 2006, une mission océanographique composée d'une équipe de 40 personnes à bord du plus grand navire de recherche du monde, le Polarstern, dépose dans le passage de Drake, entre la Terre de feu et la péninsule Antarctique, ...
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Conférences

le (28m50s)

International Negociations on Climate Change: How to Take Advantage of Risk Aversion to Improve the Conditions for the Emergence of a Consensus

Climate change is one of the best examples of global environmental problems. Countries are conscious that they have to find a solution to this global problem at the international level. Negotiations on climate change started more than 15 years ago with the signature of the United Nations Framework Convention on Climate Change. Since then, the process went through a series of conferences and protocols. Part of this process, the Kyoto protocol constitutes a major step since it designed country-specific targets defined in terms of CO2 emissions abatement. The fact is that we should not speak about an international environmental agreement ...
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Conférences

le (18m20s)

Debate

The European Science Foundation (ESF) and the French Foundation of the Maison des Sciences de l’Homme (FMSH) (within the Entre-Sciences programme) have agreed to jointly develop a new conference series in environmental sciences; an effort to actively foster exchanges between scientists working in the humanities and social sciences and their colleagues in the life and natural sciences. This interdisciplinary conference present the new advances in the modelling of the Global Change that combines Geosciences and Economics, with a perspective view from history - given the novelty of their interrelations – and from political science – given the impact of the ...
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Conférences

le (15m2s)

IPCC Working Group I

The European Science Foundation (ESF) and the French Foundation of the Maison des Sciences de l’Homme (FMSH) (within the Entre-Sciences programme) have agreed to jointly develop a new conference series in environmental sciences; an effort to actively foster exchanges between scientists working in the humanities and social sciences and their colleagues in the life and natural sciences. This interdisciplinary conference present the new advances in the modelling of the Global Change that combines Geosciences and Economics, with a perspective view from history - given the novelty of their interrelations – and from political science – given the impact of the ...
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Label UNT Documentaires

le (53m49s)

POMME, la mission

Le programme POMME (Programme océan multidisciplinaire à méso échelle) a pour principal objectif de mieux comprendre le rôle de l'océan sur le climat en tant que réservoir de carbone, de chaleur et de transformation de la matière vivante. Du 16 avril au 7 mai 2001, le navire océanographique Atalante a effectué une des quatre campagnes de mesures de ce programme de recherche dans l'Atlantique Nord-Est à mi-chemin entre le Portugal et les Açores. Les eaux océaniques de surface hivernales s'enfouissent à des profondeurs intermédiaires au début du printemps (processus de subduction). C'est à peu près durant la même période que ...
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Conférences

le (21m5s)

Conference Opening

The European Science Foundation (ESF) and the French Foundation of the Maison des Sciences de l’Homme (FMSH) (within the Entre-Sciences programme) have agreed to jointly develop a new conference series in environmental sciences; an effort to actively foster exchanges between scientists working in the humanities and social sciences and their colleagues in the life and natural sciences. This interdisciplinary conference present the new advances in the modelling of the Global Change that combines Geosciences and Economics, with a perspective view from history - given the novelty of their interrelations – and from political science – given the impact of the ...
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Conférences

le (24m59s)

The Start and the End of Our Interglacial

The previous interglacial (Marine isotope stage 5e, peaking at 125 kyr BP) is usually assumed to be a good analogue for our present-day climate. Moreover, as our present interglacial, the Holocene, is already almost 12 kyr long, paleoclimatologists were inclined to predict a quite close entrance into the next ice age. Simulations using the 2.5-D climate model of Louvain-la- Neuve show however that our interglacial will most probably last much longer than any previous one, even without human intervention (Berger and Loutre, 2002). It was suggested that this is related to the shape of the Earth’s orbit around the Sun ...
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Conférences

le (17m29s)

Long Term Climate Variability: from Past to Future and from Data to Models

Data show that climate has always changed in the past, sometimes with a larger amplitude than what we experimented for two decades. But the main signatures of the anthopogenic forcing are the speed of the change and its globality. Paleodata at different scales are used to test the realism of climate model simulations and then their ability to simulate climates very different from the present one. They are used also to test impact models for water, forest resources. This talk aims to illustrate how paleoclimatology can bring a lot to global change studies, because it privileges interdisciplinary approaches.
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Conférences

le (28m58s)

Modelling Forced and Internal Climate Variability During the Last Millennium

At hemispheric scale, the surface temperature is strongly influenced by the 28 variations of the natural (solar and volcanic) and anthropogenic (land-use, sulphate aerosols, greenhouse gas concentrations) forcings. By contrast, at regional scale, the internal variability, which is purely due to the internal dynamics of the climate system, can mask the forced response. As a consequence, before the 20th century, cold or warm periods are rarely global, homogenous phenomena. Furthermore, the response to the forcing could be associated with changes in the frequency of some modes of variability. This interplay between the response of the climate system to the various ...
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