The ERA5 Reanalysis dataset's period of record was extended to 1940 today (previously 1950). I'm still evaluating the pre-1950 data, but here's a map using the new data showing the rank from warmest to coldest that Dec-Feb 2022-23 was compared to all Dec-Feb periods since 1940-41 pic.twitter.com/TkUIWYDAXM

— Brian Brettschneider (@Climatologist49) March 8, 2023