Justice & Paix

Terrestrial ecosystems have taken up about 32% of the total anthropogenic CO2 emissions in the past six decades1. Large uncertainties in terrestrial carbon–climate feedbacks, however, make it difficult to predict how the land carbon sink will respond to future climate change2. Interannual variations in the atmospheric CO2 growth rate (CGR) are dominated by land–atmosphere carbon fluxes in the tropics, providing an opportunity to explore land carbon–climate interactions3–6. It is thought that variations in CGR are largely controlled by temperature7–10 but there is also evidence for a tight coupling between water availability and CGR11. Here, we use a record of global atmospheric CO2, terrestrial water storage and precipitation data to investigate changes in the interannual relationship between tropical land climate conditions and CGR under a changing climate. We find that the interannual relationship between tropical water availability and CGR became increasingly negative during 1989–2018 compared to 1960–1989

L'association des Shifters suisses (http://TheShifters.ch), vous propose de prendre un moment avec Vincent Mignerot au sujet de nos illusions, et des mythes ...

Les activistes de Renovate Switzerland exigent que 4 milliards de francs soient débloqués par le Conseil fédéral afin de rénover un maximum de bâtiments et d’ainsi soutenir plus de 100’000 emplois dans le secteur [1]. Cette demande très précise, détonne dans les milieux associatifs de protection pour le climat. En effet, il n’est pas question de décroissance ou d’économie alternative, demandes qui bien souvent n’engagent pas de mesures concrètes et précises....

Six militants de Renovate Switzerland ont bloqué le pont du Mont-Blanc ce samedi entre 14 heures et 15 heures, dont quatre se sont collé les mains au bitume, comme le mouvement en a l’habitude, afin de retarder leur évacuation. Il s’agissait de la huitième opération de ce type au mois d’octobre, trois ayant déjà eu lieu à Lausanne, trois à Zurich et une à Berne

Residents of an Indonesian island threatened by rising sea levels have begun legal action against the cement producer Holcim. The claim for compensation, filed in Switzerland by three men and one woman, is understood to be the first major climate damages lawsuit against a cement company.

An extensive new multi-proxy database of paleo-temperature time series (Temperature 12k) enables a more robust analysis of global mean surface temperature (GMST) and associated uncertainties than was previously available. We applied five different statistical methods to reconstruct the GMST of the past 12,000 years (Holocene). Each method used different approaches to averaging the globally distributed time series and to characterizing various sources of uncertainty, including proxy temperature, chronology and methodological choices. The results were aggregated to generate a multi-method ensemble of plausible GMST and latitudinal-zone temperature reconstructions with a realistic range of uncertainties. The warmest 200-year-long interval took place around 6500 years ago when GMST was 0.7 °C (0.3, 1.8) warmer than the 19th Century (median, 5th, 95th percentiles). Following the Holocene global thermal maximum, GMST cooled at an average rate −0.08 °C per 1000 years (−0.24, −0.05). The multi-method ensembles and th