Timeseries of HadCRU_MLE_v1.4 are also available as text files. These timeseries include estimates of global mean surface temperature anomalies, and estimates of the impacts of sea ice concentrations and an internal variability pattern on the global mean surface temperature anomaly. Estimated temperature anomalies include these impacts. The internal variability pattern corresponds well to the El Niño Southern Oscillation. Results of sensitivity tests using alternate sea ice source datasets from the Japanese Meteorological Agency (COBE-SST3) and the National Snow and Ice Data Center (modified G10010v2 appended with G02202v6) are also available.
Estimates are available for each month and year from 1850 to 2025. The maximum likelihood estimation approach allows for the estimated global mean surface temperature anomalies to be temporally complete for the entire time period. Other estimates of this dataset are also temporally complete.
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Cite as
[ Derived from parent entry - See data hierarchy tab ]
Calvert, Bruce (2026). Maximum Likelihood Estimates of Temperatures using Data from the Hadley Centre and the Climate Research Unit (Version 1.4). World Data Center for Climate (WDCC) at DKRZ. https://doi.org/10.26050/WDCC/HadCRU_MLE_v1.4