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Nombre de programmes trouvés : 3903
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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Conférences

le (36m2s)

Linking Adaptation and Mitigation for Climate Risk Reduction

How people privately and collectively adapt to climate risk can affect the costs and benefits of public mitigation policy (e.g., Kyoto); an obvious point often neglected in actual policy making. Herein we use the economic theory of endogenous risk to address this optimal mix of mitigation and adaptation strategies, and examine how increased variability in climate change threats affects this mix. We stress that a better understanding of the cross-links between mitigation and adaptation would potentially make it possible to provide more risk reduction with less wealth. Policies that are formulated without considering the cross-links can unintentionally undermine the effectiveness ...
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Conférences

le (11m43s)

The Largest Lakes and reservoirs of Russia as a Priority Water Ressource for Society

Global change for the last 25 years drives to important changes in hydrometeorological regime in different regions, reflecting water resources change of the larges reservoirs and lakes of Russia and of lakes’ district with more than 460,000 small and middle size lakes (North-western part of Russia and Finland. Interdisciplinary approaches in water resources research include as methods of traditional hydrology and climatology as paleoclimatology and economy. Decrease in the water level of largest Lakes (Ladoga, Onega, Ilmen) by 35-70 cm has been registered over the 1990s, the warmest decade in the time series. At the same time inflow to the ...
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Conférences

le (10m37s)

Turning Hazards into Ressources? Climate Change, Floods and Coastal Wetlands in the Costa Brava (North-East Iberian Peninsula)

According to the IPCC Fourth Assessment, one of the most vulnerable areas in Europe are coastal zones. This is due to sea level rise combined with increased risks from storms. Coastal wetlands, in particular, are projected to be negatively affected by sea-level rise especially where they are constrained on their landward side, and lack sediment supply. Approximately 20 percent of existing coastal wetlands may disappear by 2080 because of the expansion of the sea. Mediterranean low-lying sedimentary coasts with highly diverse ecosystems appear to be the most vulnerable areas to this phenomenon. The 4th IPCC Report also warns about the ...
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Conférences

le (15m10s)

Social Impact of global Environmental Change on Farming Communities on the Ogoli River Bank in Otukpo Area of Benue State, Nigeria

One of the manifestations of the global change in this study area is a marked reduction in the duration and amount of rainfall. This adversely affects the volume of the head waters that ultimately determine the volume of the Ogoli River which is used for irrigation. Consequently, food security and livelihood of the farming communities whose mode of agricultural production is rain-fed is adversely affected. Using Participatory Learning Action (PLA) technique involving three distinct groups of adult male, adult female and youth, the study seek to evaluate the coping mechanisms of these vulnerable group to draught and reduced volume of ...
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Conférences

le (11m20s)

The Effect of Thermal Pollution on Benthic Foraminiferal Assemblages, in the Mediterranean Shore Face Adjacent to Hadera Power Plant (Israël)

Over the past several decades public and scientific awareness to global warming has increased significantly. As a result, many studies have examined the affects of global warming. However, the consequences of global warming on marine living organisms at the Levantine basin of the East Mediterranean has not yet been explored. In this study, we have used the thermal pollution of a power plant at the Mediterranean coast of Israel as an analog for the expected future trend of sea surface temperature (SST) rise. We have performed a sequence of 11 sampling campaigns at 5 stations located along a temperature gradient ...
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