evidence: Annual global mean temperature anomalies (relative to 1850–1900) from 1850 to 2023. Data are from six data sets [...] Dozens of experts and partners contribute to the report, including UN organizations, National Meteorological and Hydrological Services (NMHSs) and Global Data and Analysis Centers, as well as Regional Climate Centres, the World Climate Research Programme (WCRP), the Global Atmosphere Watch (GAW), the Global Cryosphere Watch and Copernicus Climate Change Service operated by ECMWF. [...] It is expected that warming will continue – a change which is irreversible on scales of hundreds to thousands of years.