Service The Copernicus Climate Change Service (C3S), implemented by the European Center for Medium-Range Weather Forecasts on behalf of the European Commission with EU funding, regularly publishes monthly climate bulletins reporting changes observed in global surface air temperature and sea ice. coverage and hydrological variables. All of the findings are based on computer-generated analyzes using billions of measurements from satellites, ships, aircraft and weather stations around the world. As part of its monitoring role, C3S also closely monitors changes in ocean temperatures associated with the development of El Niño and exceptionally high temperatures in the North Atlantic Ocean. During May 2023, sea surface temperatures were higher globally than in any previous May, a trend that continued into June, with the world's oceans recording sea surface temperatures higher than in any previous June.