Flux continu

The Ocean is essential to life on Earth, regulates the climate, supports rich biodiversity, sustains livelihoods, and inspires cultures and societies. However, unregulated human impacts are putting the Ocean and its ability to contribute to humanity at risk. The Starfish Barometer is a new initiative launched on World Ocean Day (8 June 2025) to provide a concise, science-based annual overview of the multiple dimensions of the Ocean through the lens of its interdependence with humanity. Each year, the Starfish Barometer will present a carefully curated selection of Ocean-related developments, chosen for their global significance and grounded in the most up-to-date scientific evidence, intended for a broad non-specialist audience. Rather than offering an exhaustive review, it will spotlight key aspects, robust, evidence-based, and reflective of major developments of the year. The Starfish Barometer emphasizes the two-way relationship between humanity and the Ocean: we impact its future, and it shapes ours. Its

Pour la quatrième année consécutive, un consortium international de 73 chercheurs, impliquant en France des scientifiques de Météo-France, du CEA, du CNRS et de Mercator Ocean International, a actualisé les indicateurs clés du changement climatique et de l’influence humaine, à l'échelle planétaire. Leurs résultats, publiés dans la revue scientifique Earth System Science Data, indiquent que la planète accumule de la chaleur à un rythme qui accélère, et que le niveau de réchauffement planétaire dû aux activités humaines atteint désormais 1,37°C. L’étude inclut cette année un nouvel indicateur sur les vagues de chaleur marine.

C’est un indicateur climatique peu connu, et il part en vrille. Son nom : le déséquilibre énergétique de la Terre. Sa conséquence : il pourrait accélérer le réchauffement climatique bien au-delà de nos prévisions.

L’actualisation par plusieurs dizaines de scientifiques du monde entier d’indicateurs clés sur le changement climatique en 2025 contient des résultats inquiétants. Un budget carbone épuisé sous trois ans, des températures toujours plus proches du point de non-retour… Voici ce qu’il faut retenir de ce travail, publié ce jeudi dans la revue scientifique Earth system science data.

A five-year study found that warming oceans are causing Maine’s underwater kelp forests to disappear and be replaced by turf algae.

Scenarios serve as a critical tool in climate change analysis, enabling the exploration of future evolution of the climate system, climate impacts, and the human system (including mitigation and adaptation actions). This paper describes the scenario framework for ScenarioMIP as part of CMIP7. The design process has involved various rounds of interaction with the research community and user groups at large. The proposal covers a set of scenarios exploring high levels of climate change (to explore high-end climate risks), medium levels of climate change (anchored to current policy), and low levels of climate change (aligned with current international agreements). These scenarios follow very different trajectories in terms of emissions, with some likely to experience peaks and subsequent declines in greenhouse gas concentrations in this century. An important innovation is that most scenarios are intended to be run, if possible, in emission-driven mode, providing a better representation of the Earth system uncert

When James Prescott Joule lent his name to a unit of energy, he could not have foreseen today’s alarming calculations

La planète se mobilise pour le Earth Hour. Pendant une heure, des millions de personnes et des monuments emblématiques seront plongés dans le noir… Pour attirer l’attention sur l’urgence climatique. À Bruxelles, l’Atomium ou encore la Grand-Place participeront à cette action lancée par le WWF, qui fête cette année sa 20e édition.

Paul R. Ehrlich will be remembered as a scientist whose books about population and threats to the environment shaped the idea of limited growth in the modern era.

Most research on “forever chemicals” focuses on how best to remove them from the environment. But solutions to tricky problems often emerge from the most unexpected of places—as demonstrated by a new study that instead redirects the pollutants into becoming tools for extracting precious lithium. In a recent Nature Water study, a team led by Rice University researchers describes a novel way to use spent perfluoroalkyl and polyfluoroalkyl substances, or PFAS, to recover lithium from high-salinity brine pools. The team tapped into the fluorine content inside PFAS leftovers, using it to attract lithium from briny water. Remarkably, the team was able to collect lithium fluoride at 99% purity and confirmed that the sample was pure enough to boost the stability and performance of lithium-ion batteries.