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Nombre de programmes trouvés : 1154

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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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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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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le (21m39s)

Present-Day Geomorphological Changes in Polar Regions

The landscape uniqueness of polar zone manifests itself in morphological traces of older glaciations and marine transgressions, areas of present-day glaciations, multi-year permafrost, multi-year snow covers, deglaciation processes variable in time and space and resulting in an expansion of ice-free 94 areas, multi-directional geosuccession, and finally in the various responses of the Arctic peoples to landscape changes and the growing human impact. The abrupt landscape changes taking place over a period shorter than the life span of a single generation can be due to a wide variety of natural causes, whether endogenous or exogenous, or to the increasing, multi-directed human ...
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le (31m25s)

Post-2012 options to Reduce Greenhouse Gas Emissions

The presentation will focus on post-2012 options to reduce greenhouse gas (GHG) emissions, putting special emphasis on the need to abate world emissions. The presentation will focus on post-2012 options to reduce greenhouse 27 gas (GHG) emissions, putting special emphasis on the need to abate world emissions at least cost, which in turn requires the need to select a least-cost set of policy instruments. In particular, model simulations will be presented to discuss whether and how price instruments should be combined with technology- support policies in order to reduce overall mitigation costs. On a more speculative note, the potential implications ...
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le (21m7s)

From Biology to Biosemiotics

Kalevi KULL is one of the leading figures in Biosemiotics nowadays. He is professor in the Department of Semiotics at the famous Tartu University, Estonia. His current interests are the Theory of evolution, the Theory of plant communities and species co-existence and also Theoretical biology (and its history). If you want to know more on these research subjects, visit the web site of Kalevi Kull :
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