Comptes Rendus Geoscience最新文献

{"title":"Anticipating the evolution of territories","authors":"","doi":"10.5802/crgeos.32-en","DOIUrl":"https://doi.org/10.5802/crgeos.32-en","url":null,"abstract":"Ne pas laisser la planète se réchauffer à un niveau qui dépasse de plus de 1, 5 ∘ la valeur qui était celle de la période préindustrielle, est impératif si l’on s’en tient aux risques qui pèsent sur les territoires les plus vulnérables. Mais la possibilité d’y parvenir est considérablement plus restreinte qu’elle ne l’était il y a 30 ans, juste avant le sommet de la Terre de Rio en 1992. Les émissions de CO 2 étaient alors de 5 à 6 milliards de tonnes de carbone par an — elles ont doublé depuis cette date. De fait, nous avons déjà considérablement engagé le futur, comme en témoignent des phénomènes tels que la fonte des glaciers et de la banquise, le réchauffement en profondeur des océans, ou l’évolution des écosystèmes. La situation est plus grave encore, si l’on se réfère au futur proche : le réchauffement des quelques prochaines décennies est déjà fortement contraint par les émissions passées et le mélange rapide des gaz à effet de serre par la circulation atmosphérique en fait un problème mondial grandissant qui s’impose à tous. Nous avons de moins en moins la possibilité de modifier significativement l’évolution climatique locale au travers de nos propres actions. Il est donc nécessaire de s’adapter progressivement à des évolutions qui relèvent à la fois de la part déjà irrémédiable des changements à venir et des retards ou échecs des actions internationales. Les territoires ont, dans ce cadre, un rôle privilégié à jouer. C’est, en effet, à leur échelle que se développent les impacts majeurs des changements climatiques et que se fait une grande part des émissions de gaz à effet de serre. C’est donc à ce niveau que devront s’élaborer des stratégies de co-bénéfice entre atténuation et adaptation au changement climatique. Et c’est donc aussi là que devront se définir des arbitrages entre différents usages des sols, différentes stratégies de protection de la biodiversité, ou différentes gestions de zones vulnérables, telles les villes, les montagnes ou les littoraux. Ceci impose aussi une connaissance approfondie et pluridisciplinaire de ces territoires qui sont tous différents les uns des autres. L’exemple de la Nouvelle-Aquitaine, au sein de laquelle le projet Acclimaterra a mis en œuvre une série très large de visites régionales (http://www.acclimaterra.fr) montre qu’il est nécessaire de prendre la mesure des évolutions en cours, à la fois en écoutant l’expression des divers impératifs sociaux et en facilitant la prise de décisions de l’ensemble des acteurs régionaux par une « mise en récit » du diagnostic scientifique. Le projet Acclimaterra a aussi été matérialisé par la production de deux rapports qui ont rassemblé 400 scientifiques et ont été publiés sous la forme de livres soigneusement édités pour permettre d’atteindre le grand public. Ce travail a montré que les régions, en profitant du lien qui les unit à leur population, peuvent ainsi constituer un lien important d’innovation et de réflexion et apporter des éléments de solution impor","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135390596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO 2 Capture and Storage: the geological carbon sink","authors":"","doi":"10.5802/crgeos.20-en","DOIUrl":"https://doi.org/10.5802/crgeos.20-en","url":null,"abstract":"Le puits de carbone géologique consiste à « remettre » le carbone dans le sous-sol d’où il a été extrait, afin de réduire les émissions résiduelles incompressibles de CO2. Complémentaire aux puits de carbone terrestre (sols et forêts) et océanique, il devrait jouer un rôle clé pour atteindre la neutralité carbone. 19 opérations de captage et stockage de CO2 (technologie dite CSC, ou CCS en anglais) fonctionnent déjà dans le monde. D’importants efforts de recherche et d’innovation sont menés pour permettre un saut d’échelle et déployer cette technologie partout où ce sera nécessaire. La France, l’Europe et de nombreux pays pensent qu’elle sera incontournable pour parvenir à atteindre les objectifs de l’accord de Paris sur le climat et limiter le réchauffement climatique à +1.5 ∘ C. The geological carbon sink consists of “putting back” the carbon into the subsurface from which it was extracted, in order to reduce incompressible residual CO2 emissions. Complementary to terrestrial (soils and forests) and oceanic carbon sinks, it is expected to play a key role in achieving carbon neutrality. 19 CO2 capture and storage (CCS) projects are already in operation worldwide. Major research and innovation efforts are being carried out to scale up and deploy this technology wherever it is needed. France, Europe and many countries believe that CCS will be essential to achieve the objectives of the Paris climate agreement and limit global warming to +1.5 ∘ C.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135342534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are batteries the right option for a sustainable development?","authors":"","doi":"10.5802/crgeos.27-en","DOIUrl":"https://doi.org/10.5802/crgeos.27-en","url":null,"abstract":"Les enjeux liés au stockage de l’énergie ont conduit, au cours de cette dernière décennie, à un foisonnement scientifique donnant naissance à des innovations spectaculaires dans le domaine des batteries. Ces innovations font aujourd’hui de la mobilité électrique une réalité et vont également faciliter le déploiement des énergies renouvelables. Dans le contexte du déploiement massif de batteries attendu, il est légitime de se demander quelle sera la batterie du futur et, en particulier, si cette batterie sera la bonne option pour un développement durable. Il s’agit d’un challenge énorme qui peut conduire à une myriade d’opportunités. C’est ce à quoi ce manuscrit va tenter de répondre en se penchant sur de nombreux aspects de la recherche. Nous traiterons en effet de l’amélioration des performances — en termes d’autonomie, de durabilité et de sécurité — du développement de batteries plus éco-compatibles, voire plus intelligentes, reposant sur de nouvelles chimies à base de matériaux abondants, ou encore de procédés de recyclage innovants ou d’injections de fonctionnalités de diagnostic-autoréparation. Face à ce champ des possibles, optimisme et enthousiasme doivent prévaloir sur la morosité afin d’encourager nos jeunes talents à prendre part à cette aventure passionnantes. The challenges related to energy storage have led, over the past decade, to a scientific proliferation giving birth to spectacular innovations in battery research. They have contributed in making todays electric mobility a reality, and have been key enablers in the deployment of renewable energies. However, it is legitimate to wonder what will be the battery of the future and, in particular, if this battery will be the right option for sustainable development. This is what this manuscript addresses by discussing many aspects of battery research enlisting performances improvements in terms of autonomy, durability and safety. Moreover it presents on ongoing strategies aiming towards the development of more eco-compatible and smarter batteries, based either on new chemistries enlisting abundant metals (Na-ion), on innovative recycling processes or on the injections of smart sensing and self-healing functionalities. Such a diversity of fundamental scientific challenges emerging from concrete technological bottlenecks generates a myriad of fascinating opportunities to arouse new generation of talented students to take part in this exciting adventure.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136112781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Capteurs distribués de contrainte à fibres optiques : de la longue à la courte distance","authors":"","doi":"10.5802/crgeos.129-fr","DOIUrl":"https://doi.org/10.5802/crgeos.129-fr","url":null,"abstract":"Developed for more than forty years, optical fibers have features that make them particularly attractive for making sensors. One of the strengths of these sensors is that they can measure different physical parameters in a distributed manner over a wide range of lengths (from a few cm up to tens of kilometers) with a spatial resolution ranging from millimeters to meters. In this article, we are particularly interested in distributed fiber sensors, mainly based on light scattering processes, for measuring strain variations. This review concerns both applications requiring long lengths of fiber in a geological context, as well as those using length less than one meter for the medical sector. While distributed fiber optics sensors have already shown their great potential for long-range applications, short-range applications are a niche sector emerging in the last few years. Développées depuis plus de quarante ans, les fibres optiques présentent des caractéristiques qui les rendent particulièrement attractives pour la réalisation de capteurs. L’un des points forts de ces capteurs est qu’ils peuvent mesurer différents paramètres physiques de manière distribuée sur une large gamme de longueurs (de quelques cm à des dizaines de kilomètres) avec une résolution spatiale allant du millimètre au mètre. Dans cet article, nous nous intéressons particulièrement aux capteurs à fibre distribuée, principalement basés sur des procédés de diffusion de la lumière, pour mesurer les variations de déformation. Cette revue concerne à la fois les applications nécessitant de grandes longueurs de fibre dans un contexte géologique, ainsi que celles utilisant des longueurs inférieures à un mètre pour le secteur médical. Alors que les capteurs à fibre optique distribués ont déjà montré leur grand potentiel pour les applications à longue portée, les applications à courte portée sont un secteur de niche émergeant ces dernières années.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular fossils of Aptian–Albian blue marls of the Vocontian Basin (France), depositional conditions and connections to the Tethys Ocean","authors":"Armelle Riboulleau, Melesio Quijada, Alexis Caillaud, François Baudin, Jean-Noël Ferry, Nicolas Tribovillard","doi":"10.5802/crgeos.233","DOIUrl":"https://doi.org/10.5802/crgeos.233","url":null,"abstract":"The Mesozoic witnessed some episodes of marked accumulation and burial of organic matter (OM) in the Tethys Ocean and satellite basins, such as the Vocontian Basin (SE-France). These famous episodes, termed Oceanic Anoxic Events (OAEs), resulted from various factors, acting in complex synergies; the consensus about the key factors has not been reached yet. The Aptian–Albian Blue Marls Formation (Fm.) of the Vocontian Basin recorded the various substages of OAE1, plus additional organic-rich levels of regional extension. The semi-pelagic marlstones of the Blue Marls Fm. allow to carry out a detailed examination of the molecular fossils, to assess the respective weights of the factors involved in the OM storage process. In this work, we examined the lipid biomarkers of six organic-rich levels ranging from the Goguel Level to the Paquier Level in stratigraphic order. Biomarkers reputed to be characteristic of some OAEs are observed here: 2-methylhopanoids in the Goguel Level (OAE1a) and archaeal lipids in the Jacob, Kilian and Paquier Levels (OAE1b). This study shows that, in the Vocontian Basin, OM deposition resulted mostly from local factors and that each level has its own peculiarities; however, overarching connections with the Tethys Ocean were critical for the recording of global anoxic events. Supplementary Materials: Supplementary materials for this article are supplied as separate files: crgeos-233-suppl.pdf Table-S1.xlsx Le Mésozoïque a connu des épisodes d’accumulation et d’enfouissement marqués de matière organique (MO) dans la Téthys et les bassins satellites, comme le bassin vocontien (SE-France). Ces fameux épisodes, appelés Oceanic Anoxic Events (OAE), résultent de différents facteurs, agissant en synergies complexes ; le consensus sur les facteurs clés n’a pas encore été atteint. La formation des Marnes Bleues Aptiennes–Albiennes du bassin vocontien a enregistré les différentes sous-étapes de l’OAE1, ainsi que des niveaux riches en MO supplémentaires d’extension régionale. Ces marnes hémipélagiques se prêtent à un examen détaillé des fossiles moléculaires, afin d’évaluer les poids respectifs des facteurs impliqués dans le processus de stockage de la MO. Dans ce travail, nous avons examiné les biomarqueurs lipidiques de six niveaux riches en MO allant du niveau Goguel au niveau Paquier par ordre stratigraphique. Des biomarqueurs réputés caractéristiques de certains OAE sont observés ici : 2-méthylhopanoïdes dans le niveau Goguel (OAE1a) et lipides d’archées dans les niveaux Jacob, Kilian et Paquier (OAE1b). Cette étude montre que, dans le bassin vocontien, le dépôt de MO résulte principalement de facteurs locaux et que chaque niveau a ses propres déterminismes ; cependant, les connexions du bassin avec la Téthys ont été cruciales pour l’enregistrement des événements anoxiques globaux. Compléments : Des compléments sont fournis pour cet article dans les fichiers suivants : crgeos-233-suppl.pdf Table-S1.xlsx","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135695804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First evidence of sinter and travertine in Cameroon: fault reactivation and geothermal implications","authors":"Milan Stafford Tchouatcha, Arnaud Patrice Kouske, Primus Azinwi Tamfuh, Alain Préat, René Toyama, Roger Feumba, Vannelle Tiokeng Ngounfack, Vivant Madjingain, Yaya Berinyuy Konglim, Rigobert Tchameni","doi":"10.5802/crgeos.230","DOIUrl":"https://doi.org/10.5802/crgeos.230","url":null,"abstract":"The Laopanga hot spring deposits along the “Cameroon Volcanic Line” (CVL) are distinctive in being both siliceous sinter and travertine, made up of immature amorphous silica and mainly calcite, and associated with detrital deposits such as claystone, sandstone and conglomerate. Their age range from Plio-Pleistocene to Actual. Sr concentrations (17 to 2304 ppm) suggest an enrichment by epithermal outflows. δ 13 C and δ 18 O values, ranging respectively from 1.5‰ to 2.9‰ V-PDB and -10.1‰ to -6‰ V-PDB, reflect a high temperature of the parent solution (40 °C) related to an elevated geothermal gradient. The europium anomalies values (Eu/Eu*: 0.54–1.78) indicate the temperature variation of precipitated deposits related to distance of the deep hot water flow. The chemical compositions of the lithofacies show the diversity of the spring deposits related to complex phenomena of internal migration of mineralized hot water and the tectonic controls during the Precambrian fault reactivations.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Provence Coalfield: trajectory, assessment and prospective","authors":"Sylvie Daviet, Alexandra Schleyer-Lindenmann, Jean-Claude Raynal, Pierre Batteau, Yves Noack","doi":"10.5802/crgeos.223","DOIUrl":"https://doi.org/10.5802/crgeos.223","url":null,"abstract":"The trajectory taken by the Provence Coalfield (or Bassin Minier de Provence), located between Aix-en-Provence and Marseille, is explained by its long mining history, disrupted by the closure of the mine in 2003. We approach this space from a global perspective, considering the social, economic and environmental dimensions of the socio-ecosystem. The conclusion puts forward scenarios for the evolution of the territory and the perspectives for research, underlining the growing role of the energy transition, especially in the context of the closure of the coal-fired power plant. La trajectoire du Bassin Minier de Provence (BMP), localisé entre Aix-en-Provence et Marseille, s’explique par une longue histoire minière, interrompue par l’arrêt de la mine en 2003. Nous abordons cet espace dans une perspective globale, en considérant les dimensions sociales, économiques et environnementales du socio-écosystème. La conclusion propose des scenarii d’évolution du territoire et des perspectives de recherche, soulignant le rôle ascendant de la transition énergétique, notamment dans le contexte de la fermeture de la centrale à charbon.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135537595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen and hydrogen sulphide in volcanic gases: abundance, processes, and atmospheric fluxes","authors":"Alessandro Aiuppa, Yves Moussallam","doi":"10.5802/crgeos.235","DOIUrl":"https://doi.org/10.5802/crgeos.235","url":null,"abstract":"Hydrogen (H 2 ) and hydrogen sulphide (H 2 S) are typically present at only minor to trace levels in volcanic gas emissions, and yet they occupy a key role in volcanic degassing research in view of the control they exert on volcanic gas reducing capacity (e.g., their ability to remove atmospheric O 2 ). In combination with other major compounds, H 2 and H 2 S are also key to extracting information on source magma conditions (temperature and redox) from observed magmatic gas compositions. Here, we use a catalogue, compiled by extracting from the geological literature a selection of representative analyses of magmatic to mixed (magmatic–hydrothermal) gases, to review the processes that control H 2 and H 2 S abundance in volcanic gases. We show that H 2 concentrations and H 2 /H 2 O ratios in volcanic gases both exhibit strong positive temperature dependences, while H 2 S concentrations and H 2 S/SO 2 ratios are temperature insensitive overall. The high H 2 concentrations (and low H 2 S/SO 2 compositions, of ∼0.1 on average) in high-temperature (>1000 °C) magmatic gases are overall consistent with those predicted thermodynamically assuming external redox buffering operated by the coexisting silicate melt, at oxygen fugacities ranging from ΔFMQ -1 to 0 (non-arc volcanoes) to ΔFMQ 0 to +2 (arc volcanoes) (where ΔFMQ is oxygen fugacity expresses as a log unit difference relative to the Fayalite–Magnetite–Quartz oxygen fugacity buffer). Lower temperature (<1000 °C) volcanic gases exhibit more oxidizing redox conditions (typically above the Nickel–Nickel Oxide buffer) that are caused by a combination of (i) gas re-equilibration during closed-system (gas-phase only) adiabatic cooling in a gas-buffered system, and (ii) heterogenous (gas–mineral) reactions. We show, in particular, that gas-phase equilibrium in the H 2 –H 2 S–H 2 O–SO 2 system is overall maintained upon cooling down to ∼600 °C, while quenching of higher temperature equilibria (at which Apparent Equilibrium Temperatures, AETs, largely exceed measured discharge temperatures) is more frequently observed for higher extents of cooling (e.g., at T<600 °C). In such lower temperature volcanic environments, gas–mineral reactions also become increasingly important, scavenging magmatic SO 2 and converting it into H 2 S and hydrothermal minerals (sulphates and sulphides). These heterogeneous reactions, when occurring, can also control the temperature dependence of the volcanic gas H 2 /H 2 O ratios. Finally, by using our volcanic gas dataset in tandem with recently published global volcanic SO 2 and CO 2 budgets, we provide refined estimates for total H 2 S (median, 1.4 Tg/yr; range, 0.9–8.8 Tg/yr) and H 2 (median, 0.23 Tg/yr; range, 0.06–1 Tg/yr) fluxes from global subaerial volcanism.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134958127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analogue model of rift linkage and inversion with application to the Western Alps","authors":"Nicolas Dall’Asta, Yoann Denèle, Vincent Regard, Anne Frayssignes, Guilhem Hoareau, Sylvie Leroy, Thibaut Pires","doi":"10.5802/crgeos.231","DOIUrl":"https://doi.org/10.5802/crgeos.231","url":null,"abstract":"Along-strike segmentation of orogens raises questions because its causes may predate orogeny in relation to structural inheritance. Here we focus on rift/margin linkage domains and their inversion by using analogue models with image analysis to extract the 3D strain field. Extensional models document, depending on the strike-perpendicular offset and the brittle-crust thickness, three types of rift linkage modes: (1) oblique linkage with early T-fault, (2) strongly-oblique linkage with R-fault network and, (3) transfer-linkage with late Y-strike-slip fault. Analogue model of inverted rift basins is used to analyse the misunderstood tectonic evolution of transition zones in the segmented Western Alpine belt.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136308434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predictability of water resources with global climate models. Case of Northern Tunisia","authors":"Mustapha Besbes, Jamel Chahed","doi":"10.5802/crgeos.219","DOIUrl":"https://doi.org/10.5802/crgeos.219","url":null,"abstract":"The objective of the research is to explore the predictability of water resources directly with GCMs by analysing long-term effects of climate change on Northern Tunisia’s blue and green water. Hydrologic impacts rely on a rainfall-runoff lumped model using outputs of CMIP6 GCMs within the framework of the ssp2-45 scenario. Among the 30 CMIP6 models, the composite cnrm-esm2-1 and fgoals-g3 best restore observed runoff from 1995 to 2014 and give the best GCM. Hydrologic projections 2015–2100 show significant drops in rainfall (9%), runoff (21%), groundwater recharge (15%), as well as for green water (6%). The results show that the use of raw GCMs predictions on large basins is possible and provides precisions comparable to what is produced when using Regional Climate Models in medium size basins.","PeriodicalId":50651,"journal":{"name":"Comptes Rendus Geoscience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136310421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}