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Nombre de programmes trouvés : 4042
Conférences

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Séance introductive

Au coeur de multiples débats, considérées parfois comme un problème majeur des socié­tés européennes, les expériences migratoires - prendre la route, quitter sa région d’origine et ses proches, découvrir les manières d’être des sociétés rencontrées, s’établir dans un nouveau monde, soutenir des relations avec le pays d’origine - prennent aujourd’hui des formes nouvelles, tant au niveau des pratiques elles-mêmes que des représentations qui en sont produites et diffusées. Classiquement analysées pour leur impact sur les sites de départ ou d’accueil, les migrations sont envisagées ici du double point de vue de ces expériences migratoires elles-mêmes (incertitudes du parcours, épreuves de ...
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le (0s)

Atelier 4 : Altérité chez soi, altérité en soi

La migration ne peut être envisagée du seul point de vue des populations migrantes, qui sont également « tributaires » de l’accueil dans les sociétés de destination. L’expérience de l’altérité chez soi constitue donc un marqueur important pour les populations et les sociétés. Les dernières années ont vu se développer de nouvelles attitudes et pratiques institutionnelles et politiques à l’égard des étrangers, des migrants, de leur descendance. De même, les discours et les politiques publiques ont un effet certain sur les pratiques sociales, ou encore sur la déculpabilisation des discours au sujet des dangers que représente l’immigration.
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Atelier 6 : Filmer la migration. Deux expériences autour du documentaire sociologique

Au coeur de multiples débats, considérées parfois comme un problème majeur des socié­tés européennes, les expériences migratoires - prendre la route, quitter sa région d’origine et ses proches, découvrir les manières d’être des sociétés rencontrées, s’établir dans un nouveau monde, soutenir des relations avec le pays d’origine - prennent aujourd’hui des formes nouvelles, tant au niveau des pratiques elles-mêmes que des représentations qui en sont produites et diffusées. Classiquement analysées pour leur impact sur les sites de départ ou d’accueil, les migrations sont envisagées ici du double point de vue de ces expériences migratoires elles-mêmes (incertitudes du parcours, épreuves de ...
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Conférences

le (28m6s)

Global Climate Change: Past and Future

My presentation will begin with a review of the now-solid evidence for a human influence on the climate of recent decades. Such evidence includes instrumental measurements available for the past two centuries, paleoclimate observations spanning more than a millennium, and comparisons of the predictions from computer models with observed patterns of climate change. I will then address how the study of paleoclimate can inform our assessments of the potential future impacts of human-induced climate change.
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Conférences

le (31m27s)

From Climate Models to Earth System Models

Complex climate models that describe the evolution of the coupled ocean atmosphere cryosphere system are gradually extended to “non physical” components of the earth system, and account for land vegetation dynamics, ocean biology, global biogeochemistry and atmospheric chemistry. In the future, these models will have to better represent the potential feedbacks with society and therefore to couple the natural bio-physical components with the socio-economic system. The paper will review the present status of complex climate and Earth system models, report some preliminary attempts to include societal aspects, and highlight challenges for future research.
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Conférences

le (15m57s)

Cross-Disciplinary International Research on Land-Atmosphere Interactions

The presentation will focus on scientific issues of importance to global change and climate change research: interactions of reactive trace and greenhouse gases between the biosphere and atmosphere in combination with boundary layer processes, importance of land use and land cover for climate studies, and aerosol-cloud-precipitation-climate interactions. These issues are of vital importance and research is carried out under the auspices of the multi- and cross-disciplinary Integrated Land Ecosystem-Atmosphere 81 Processes Study (iLEAPS), a core project of the International Geosphere- Biosphere Programme (IGBP) in collaboration with other international research organizations. The interactions between the biosphere and the atmosphere mediated by ...
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Conférences

le (30m18s)

Borehole Climatology and Model Simulations: Steps to Integrated Assessment

Progress in understanding climate variability through the last millennium leans on simulation and reconstruction efforts. Exercises blending both approaches present a great potential for answering questions relevant both for the simulation and reconstruction of past climate, and depend on the specific peculiarities of proxies and methods involved in climate reconstructions, as well as the realism and limitations of model simulations. This talk addresses the use of millennial simulations with the ECHO-g model to explore three main issues that group most of the interaction between model and geothermal efforts: the use of models as a validation tool for borehole climate reconstructions; ...
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Conférences

le (37m35s)

Are European Ecosystems Vulnerable to Climate Change

The relatively simple question posed by this title turns out to be complicated in its implementation, for a number of reasons: First, ecosystems have changed in response to changing climate throughout history - however this has not normally been qualified as “vulnerability”. Second, most changes in 26 ecosystems have multiple forcings, climate change being only one of them. Third, whether changes in ecosystem functioning qualify as “vulnerability” depends largely on the human point of view. Resolving the issue is very urgent today, because it is indisputable that rapid changes are taking place and that some of these are considered “negative ...
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Conférences

le (22m8s)

Regional Climate Change and Extremes

Global coupled ocean-atmosphere models, driven by greenhouse gas concentrations according to several hypotheses for the next century, have been used in the last IPCC-AR4 report to depict possible future climates of the planet. It will be shown that a regional atmosphere model is able to represent with some fidelity the different climates over France, thanks to a realistic representation of the main mountains. Local extreme phenomena like intense precipitations are better taken into account. Regional models are an essential link between physical hypotheses (e.g. 2x versus 3x CO2 concentration) and needs from the impact community.
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Conférences

le (45m11s)

A Roadmap to Assess the Economic Cost of Climate Change with an Application to Hurricanes in the United States

This talk presents a methodological roadmap to assess macro-economic damages from climate change. To do so, it explores a single manifestation of climate change in a single location: an increase in hurricane intensity in the United States. The presentation starts from a global climate change, and follows the causal chain to total macro-economic losses. First, the large-scale change is downscaled to a spatial scale pertinent to investigate socio-economic impacts. Here, the Emanuel hurricane model is used to estimate present and future local landfall probabilities. Second, a statistical analysis of historical landfalls is used to translate these probability changes into direct ...
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