La veille

Under current emission trajectories, temporarily overshooting the Paris global warming limit of 1.5 °C is a distinct possibility. Permanently exceeding this limit would substantially increase the probability of triggering climate tipping elements. Here, we investigate the tipping risks associated with several policy-relevant future emission scenarios, using a stylised Earth system model of four interconnected climate tipping elements. We show that following current policies this century would commit to a 45% tipping risk by 2300 (median, 10–90% range: 23–71%), even if temperatures are brought back to below 1.5 °C. We find that tipping risk by 2300 increases with every additional 0.1 °C of overshoot above 1.5 °C and strongly accelerates for peak warming above 2.0 °C. Achieving and maintaining at least net zero greenhouse gas emissions by 2100 is paramount to minimise tipping risk in the long term. Our results underscore that stringent emission reductions in the current decade are critical for planetary stabili

D'autres pays l'avaient fait avant l'Allemagne. L'Allemagne autorise l'Ukraine à utiliser des armes allemandes contre des cibles militaires en Russie pour se défendre des attaques lancées par Moscou, notamment dans la région de Kharkiv, a annoncé vendredi le porte-parole du chancelier Olaf Scholz, Steffen Hebestreit.

Global projections of macroeconomic climate-change damages typically consider impacts from average annual and national temperatures over long time horizons1–6. Here we use recent empirical findings from more than 1,600 regions worldwide over the past 40 years to project sub-national damages from temperature and precipitation, including daily variability and extremes7,8. Using an empirical approach that provides a robust lower bound on the persistence of impacts on economic growth, we find that the world economy is committed to an income reduction of 19% within the next 26 years independent of future emission choices (relative to a baseline without climate impacts, likely range of 11–29% accounting for physical climate and empirical uncertainty). These damages already outweigh the mitigation costs required to limit global warming to 2 °C by sixfold over this near-term time frame and thereafter diverge strongly dependent on emission choices. Committed damages arise predominantly through changes in average tempe

Vulkan Gruppe a revendiqué ce mardi 5 mars le «sabotage» d’une infrastructure électrique qui a provoqué l’arrêt de l’entreprise géante Tesla installée en Allemagne. L’entreprise estime le préjudice à plusieurs centaines de millions d’euros.

Un centre d'accueil de réfugiés à Berlin a été mis en quarantaine lundi à la suite d'une épidémie de rougeole.

Last Generation exige de mettre fin au recours aux carburants fossiles.

Des activistes climatiques du groupe Last Generation ont à nouveau bloqué plusieurs routes à Berlin lundi, dans le cadre d'une nouvelle série de manifestations pour demander la fin des combustibles fossiles.

Nouvelle opération coup de poing. Des activistes du mouvement Dernière Génération ont aspergé dimanche 17 septembre de peinture la porte de Brandebourg, le monument le plus célèbre de Berlin, en Allemagne, pour appeler à accélérer la sortie des combustibles fossiles et mieux lutter contre le réchauffement climatique.

Simultaneous harvest failures across major crop-producing regions are a threat to global food security. Concurrent weather extremes driven by a strongly meandering jet stream could trigger such events, but so far this has not been quantified. Specifically, the ability of state-of-the art crop and climate models to adequately reproduce such high impact events is a crucial component for estimating risks to global food security. Here we find an increased likelihood of concurrent low yields during summers featuring meandering jets in observations and models. While climate models accurately simulate atmospheric patterns, associated surface weather anomalies and negative effects on crop responses are mostly underestimated in bias-adjusted simulations. Given the identified model biases, future assessments of regional and concurrent crop losses from meandering jet states remain highly uncertain. Our results suggest that model-blind spots for such high-impact but deeply-uncertain hazards have to be anticipated and acc

Les négociateurs du futur traité contre la pollution plastique pourraient être tentés de se limiter à l’approche du pollueur-payeur, comme en France où les entreprises financent la collecte de leurs déchets. Grave erreur, explique Flore Berlingen, autrice et spécialiste du sujet, dans cette tribune à Vert.