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Soirée de rencontre autour du livre « Tout comprendre (ou presque) sur le climat »
10/11/2023 19:00
Informer, sensibiliser, agir : les scientifiques face au changement climatique. Une soirée organisée à l’Académie du Climat, autour du livre « Tout comprendre (ou presque) sur le climat », médaille de la médiation scientifique du CNRS 2023.
Keep In Touch 2023 ! Le 2e RDV Alumni de l’IPSL-Climate Graduate School
09/11/2023 18:30
L’IPSL-Climate Graduate School organise son deuxième rendez-vous Alumni.
Festival Explor'Espace
03/11/2023 10:00
Explor’Espace est le premier festival interactif consacré à l’astronomie et à l’espace en langue française.
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ClimarisQ: un jeu vidéo pour comprendre la complexité du climat et l'urgence d'une action collective
17/06/2021 11:00
ClimarisQ est un jeu pour smartphone/web issu d’un projet de médiation scientifique qui met en évidence la complexité du système climatique et l’urgence d’une action collective pour limiter le changement climatique.
Impact de la fonte du pergélisol sur la dynamique du carbone des tourbières arctiques
15/06/2021 11:00
Aux hautes latitudes, le pergélisol, le sol restant gelé deux années consécutives, évolue rapidement sous la pression du changement climatique. Le pergélisol contient la moitié du stock de carbone organique mondial des sols. Si ce carbone, accumulé depuis des millénaires, est réémis vers l’atmosphère, cela constituerait un rétroaction positive au changement climatique.
Impacts de l’arasement d’un barrage sur la morphologie d’un cours d’eau et la remobilisation de sédiments contaminés
11/06/2021 12:00
L’impact anthropique sur les cours d’eau a significativement augmenté suite à la révolution industrielle engagée par les pays occidentaux.
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European climate change: co-development of local climate services and clustering approaches
27/09/2021 14:00
Climate change has various impacts on society, but future changes are uncertain and a wide gap remains between the scientific knowledge and societal action (mitigation, adaptation). The gap in climate adaptation was partly addressed by the recent growth of climate services, but their local usability is associated to many barriers. France is an example of lacking climate adaptation at territorial level, and this thesis focuses on the Gulf of Morbihan as a case study. My research aims first to identify the role of climate change in the territory, second to support the local development of adaptation planning, and third to explore future climate change through the angle of clustering approaches.
To identify the local role of climate change, I analyze the literature (grey and academic) and engage in field interviews with various stakeholders. Particular features of the territory emerge: the coastal-inland contrast (economy, demography), the socioeconomic life organized seasonally, and the dependence and conflict between agriculture and tourism. The local role of climate change is complex, impacting emblematic activities (oyster farming, salt production), overlapping with existing issues (socioeconomic imbalance, land-use conflict), and affecting agriculture negatively (warmer and drier summers) but tourism positively (longer summer weather). The local experiences are generallyconsistent with scientific knowledge (ongoing changes, link to climate change), although some elements are scarce in local perceptions (heatwaves).
To assist local adaptation, I participated to the experimentation of different foresight activities (scenario workshop, art-science exhibition, conference-debate) with local stakeholders, based on an assessment of climate services and on creative art-design tools (e.g. poker design cards). The main outcomes are two long-term scenarios, multiple short-term actions and several hinge points on which the scenarios depend. The two scenarios represent divergent visions of the territory: continued occupation of the coast despite coastal risks, or withdrawal from the coast and densification of urban areas inland. The scenarios depend on the issue development of urbanization and spatial planning, food and energy autonomy, and demographic balance. The theme of food and energy autonomy concentrates conflicting views between inhabitants, highlighting fears and desires about long-term territorial choice.
My investigation of the territory highlighted several climatic themes (e.g. seasonality of weather conditions) that are linked to atmospheric circulation, but future circulation changes are highly uncertain. To investigate the future seasonality of atmospheric circulation, I classify year-round patterns of geopotential height at 500 hPa (Z500) from a reanalysis and several climate models. Despite their biases, climate models reproduce similar evolution of circulation seasonality as the reanalysis. During the last decades, winter conditions have decreased while summer conditions have increased, and these changes strengthen under future climate change. Yet circulation seasonality remains similar relatively to the increase in average Z500, and the same happens for surface temperatures associated to the circulation patterns. I additionally developed the perspective of a new approach to study the local evolution of weather seasonality, based on the classification of multiple variables (temperature, precipitation, windspeed).
In addition to the effects from future climate change, the Gulf of Morbihan will probably welcome new populations, and an active collective strategy of adaptation is required. Several routes have been featured in my research to address the local needs in climate adaptation, including perspectives inspired from existing climate services in other countries. The findings from this thesis highlight the physical and social dimensions of climate change.
La soutenance de thèse aura lieu en ligne : https://bbb.lsce.ipsl.fr/b/sou-6md-694
