No abstract available

[en] This project first aimed at the development of a modelling, at a scale consistent with an economic decision, the relationship between inputs such as nitrogen or mineral supplies and crop efficiencies, and secondly at studying impacts of climate change on the European agriculture sector. More precisely, the agronomic objective was to generate curves of responses of efficiency to nitrogen fertilisation (these curves depend on soil conditions, climate and technical aspects). As far as economy is concerned, the objective was to develop an automatic method and to use it within the context of the economic database for some typical regions and typical farms, and then to develop a coupling with the AROPAj model.

[en] This document gathers the transparencies of the available presentations given at this colloquium on the impacts of climate change on economy, society, ecosystems and public health: 1 - images of climate changes in France in the 21. century according to CNRM and IPSL scenarios (M. Deque); 2 - climatic risks and public policy (P. Ambrosi); 3 - climatic policy and carbon sequestration by forests and agricultural practices (D. Arrouays); 4 - towards new inventories of net greenhouse gas (direct or indirect) and aerosol emissions (P. Ciais); 5 - impact on hydro-systems (P. Chevallier); 6 - impacts on health (J.P. Lacaux); 6 - climate and health (Y. Le Maho); 7 - synthesis of the colloquium (J.C. Andre). (J.S.)

[en] This research aimed at determining whether forest ecosystems could store more carbon, which forestry can promote such a storage dynamics, and whether storage effects are sustainable. This lead to the development of a carbon model to assess the evolution of carbon storages under human and climatic constraints, and thus to model the building up of the organic storage. The authors report the study of the stand age effect, of the amendment/fertility effect, and of the effect of the silviculture process on carbon and soil nitrogen stock variations. Another report, related to the programme on the management and impacts of climate change, addresses the effects of forestry on the carbon storage in forest soils, and more particularly the validation of the parameters of the carbon stock evolution model. It provides data on the impact of silviculture management changes to support the validation of the model, and thus proposes an alternative presentation of issues addressed in the first report.