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Nombre de programmes trouvés : 139

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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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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