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.

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

Access to robust and current information is essential for ensuring evidence-based policy and practice and identifying research gaps. For these purposes, more than 90 authors from about 30 national public authorities and institutions contributed to a comprehensive synthesis of the current evidence in Germany, published as 14 articles in the Journal of Health Monitoring.

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

Over the past week, police have taken brutal steps to suppress ecological movements in Europe and the United States. In Germany, police evicted and destroyed the long-occupied village of Lützerath in a massive operation in order to expand an ecologically devastating open pit coal mine.

Germany’s Rhine, one of Europe’s key waterways, is just days away from being closed to commercial traffic because of very low levels caused by drought, authorities and industry have warned. Crucially, the impending crisis could lead energy companies to cut their output, one of the country’s biggest gas companies has said.

A coal-fired power plant that had been mothballed has become the first of its kind to be put back on to the network in Germany, as debate rages over how Europe’s largest economy will cope without Russian gas. The facility in Lower Saxony, which is owned by the Czech energy company EGH, has received emergency permission to run until April in an attempt to boost energy production.

Coal plants will be reactivated if Russian President Vladimir Putin threatens a gas cutoff, a government official said. That would trigger the second of a three-stage Germany’s gas emergency plan.

Allhoff-Cramer claims that the automaker is partly responsible for the impact of global heating on the farming industry and wants Volkswagen to stop making combustion engines by 2030. "Farmers are already being hit harder and faster by climate change than expected," says Allhoff-Cramer.

Microplastics are deposited in river floodplains and carried down to deeper levels, according to a study published in the journal Science of the Total Environment. Local topography, frequency of floods, and soil characteristics can affect the amount of plastic particles that are deposited and potentially carried into deeper soil.