Globally averaged surface air temperature anomalies relative to 1991–2020 for each September from 1940 to 2023. Data: ERA5. Credit: C3S/ECMWF. The Copernicus Climate Change Service (C3S), implemented by the European Centre for Medium-Range Weather Forecasts on behalf of the European Commission with funding from the EU, routinely publishes monthly climate bulletins reporting on the changes […]