Climate change poses a substantial challenge to ski tourism due to the strong reductions in snow cover in many mountain regions. Here, the authors assess the risks to ski resorts in 28 European countries and the potential water demand and emissions associated with snowmaking.

The release of the IPCC Synthesis Report concludes the sixth assessment cycle (AR6). Nature Climate Change speaks to outgoing IPCC Chair Hoesung Lee about the reports, and the lessons that may inform the seventh assessment cycle.

Climate change research and assessments, including the most recent IPCC report, paint an increasingly dire picture of the future. However, the assumption that the future will be worse than the present may be wrong for many aspects of human well-being.

Planning for climate change means accounting for melting ice and sea-level rise; exactly how much is shaped by many factors, each carrying its own uncertainties. Scientists are grappling with this uncertainty to better understand the fate of ice sheets and coastlines.

Fire impacts soil organic carbon stocks, in addition to aboveground biomass, yet changes are not well constrained. This study shows that more soil carbon is lost from drier ecosystems than humid ones and that the carbon sink is increasing in savannah–grassland regions with declining burned area.

To test the reproducibility of ocean acidification research, the authors conducted a meta-analysis of 373 studies on calcification of marine calcifiers across 24 years. While the size of negative effects declined over time, the results remained reproducible and their limitations were then explored.

Changes in air temperature are usually considered for quantifying changes in temperature extremes such as heatwaves. This study shows that the incidence of heat extremes in soils is increasing faster than air temperature in some regions, with implications for hydrological and biogeochemical processes.

The decarbonization of the global iron and steel industry is important for energy systems mitigation. Using a facility-level database, this Article presents cost-effective, region-specific strategies targeting plants with a large age-to-capacity ratio and/or high emissions intensity.

Recent decades have seen the increasing frequency of multiyear La Niña events. Here the authors find that there are two different types of multiyear La Niña that are each linked to different mechanisms related to warming in the western equatorial Pacific.

The authors estimate the intensity, duration and number of global marine heatwaves from 1993 to 2019, from the surface to 2,000 m. They show generally higher intensity of marine heatwaves at 50–200 m, but increased duration with depth, and predict ocean regions of higher biodiversity exposure.

The global stocktake (GST) could both enable and hamper the inclusion of equity. This Comment outlines why equity is central to the GST and the challenges faced in addressing it, as well as the utility of needs-based assessments for advancing equity within the GST and the climate action generally.

Ice melt processes that take place at the ice–ocean boundary of Greenland and Antarctic glaciers play a pivotal role in their evolution and contribution to sea-level rise, but widespread observations in these regions are lacking. A major observational initiative will be necessary to drastically reduce uncertainties in projections and better prepare society for sea-level rise.

Better integration of climate action and sustainable development can help enhance the ambition of the next nationally determined contributions, as well as implementation of the Sustainable Development Goals. Governments should use this year as an opportunity to emphasize the links between climate and sustainable development.

Non-state actors play an essential role in the fabric of global climate governance. Here we propose four tailored strategies that non-state actors can mobilize to advance climate action among states and harness the potential of the global stocktake.

The global stocktake seeks to enhance climate ambition through assessment and review of collective efforts every five years. A recent breakthrough in finance for addressing loss and damage is an opportunity to strengthen the finance agenda and rebuild much needed trust in the multilateral system.