The 30 year average of ERA5ERA ERA stands for 'ECMWF Re-Analysis' and refers to a series of research projects at ECMWF which produced various datasets (ERA-Interim, ERA-40, etcetera). global temperature anomalies will reach +1.5°C above the 1850-1900 pre-industrial age by the 27th of October 2029. That’s what an extrapolation forward of a linear trend for the last 30 years daily anomalies indicates. The daily series has already had values over +2.0°C in the last year, and the estimated annual mean for 2024 (as of 30 November) already stands at +1.59°C. The 30 year mean is important because 30 years is the period that the WMOWMO The World Meteorological Organisation is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics. use for climatological averages.
