Suchergebnisse

Le niveau des mers et des océans monte. Or, une élévation de plusieurs dizaines de centimètres supplémentaires à l'horizon des prochaines décennies se traduira par une augmentation considérable du niveau des risques pour la plupart des littoraux du monde. Il existe des moyens d'anticiper ce défi, qui vont d'interventions menées à l'échelle planétaire via la réduction des émissions de gaz à effet de serre, aux échelons plus locaux à travers la mise en place d'actions concrètes de réduction des risques côtiers .

Ce colloque-débat avait vocation à soutenir les progrès de l'action publique française dans les domaines de la réduction des risques naturels et de l'adaptation au changement climatique sur les littoraux. Pour cela, il s'est appuyé à la fois sur des communications de chercheurs proposant un état actualisé des connaissances scientifiques au moment où le volume 2 du 5ème rapport du GIEC était rendu public, et sur des interventions d'acteurs témoignant de leur propre expérience. La confrontation des sphères de la science et de l'action, publique comme privée, nécessaire pour assurer les progrès de la recherche comme de la décision publique, a été organisée à travers des séances plénières et des tables rondes qui ont permis de mettre en débat les questions clés auxquelles est aujourd'hui confrontée notre société.

Ce colloque-débat avait vocation à soutenir les progrès de l'action publique française dans les domaines de la réduction des risques naturels et de l'adaptation au changement climatique sur les littoraux. Pour cela, il s'est appuyé à la fois sur des communications de chercheurs proposant un état actualisé des connaissances scientifiques au moment où le volume 2 du 5ème rapport du GIEC était rendu public, et sur des interventions d'acteurs témoignant de leur propre expérience. La confrontation des sphères de la science et de l'action, publique comme privée, nécessaire pour assurer les progrès de la recherche comme de la décision publique, a été organisée à travers des séances plénières et des tables rondes qui ont permis de mettre en débat les questions clés auxquelles est aujourd'hui confrontée notre société.

This symposium was intended to support the progress of French public action in the areas of reducing natural hazards and adapting to climate change on coastal areas. In doing so, it relied both on communications from researchers proposing an up-to-date state of scientific knowledge at the time when volume 2 of the 5th IPCC report was made public, and on interventions by actors demonstrating their own experience. The confrontation between the spheres of science and action, both public and private, needed to ensure the progress of research and public decision-making was organised through plenary sessions and round tables, which allowed debate on the key issues facing our society today. ; Ce colloque-débat avait vocation à soutenir les progrès de l'action publique française dans les domaines de la réduction des risques naturels et de l'adaptation au changement climatique sur les littoraux. Pour cela, il s'est appuyé à la fois sur des communications de chercheurs proposant un état actualisé des connaissances scientifiques au moment où le volume 2 du 5ème rapport du GIEC était rendu public, et sur des interventions d'acteurs témoignant de leur propre expérience. La confrontation des sphères de la science et de l'action, publique comme privée, nécessaire pour assurer les progrès de la recherche comme de la décision publique, a été organisée à travers des séances plénières et des tables rondes qui ont permis de mettre en débat les questions clés auxquelles est aujourd'hui confrontée notre société.

S'adapter au changement climatique, est-ce s'y résigner ? Longtemps soutenu, le discours ne résiste pas à l'examen. Ni à la nécessaire complémentarité des stratégies, entre adaptation et atténuation.

The Adaptation Gap Report AGR2021 builds on the framing first introduced in the 2020 edition of the report to further advance knowledge on adaptation progress around the world. It focuses on adaptation progress at the global and national scales, relying primarily on publications from national governments (for example, documents submitted under the United Nations Framework Convention on Climate Change [UNFCCC] process). It has also expanded the sources of information to include recent peer-reviewed scientific literature and reports by multilateral organizations and think tanks. This chapter frames the report both in terms of the climate risk context within which adaptation is taking place (section 2.2) and the conceptual and methodological approach used to understand adaptation progress (section 2.3).

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.

International audience ; The Paris Agreement target of limiting global surface warming to 1.5–2∘C compared to pre-industrial levels by 2100 will still heavily impact the ocean. While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services. A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions toward a sustainable outcome. We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures.