|Tim Osborn: HadCRUT4 temperature 12-month running means|
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Visualisations of the full timeseries of global and hemispheric temperature anomalies, using 12-month running means.
The temperature dataset is our HadCRUT4 data.
12-month running mean values
These graphs show the 12-month running-mean temperature anomalies (blue line). Their estimated uncertainties (pale blue shading) are assumed to be equal to the uncertainties of annual means.
Using 12-month running means avoids the abritrary division into calendar years for annual averages, and so it can better capture short-lived anomalies (e.g. those associated with ENSO events) that do not necessarily align with calendar years. It also allows the most recent data to be included (indicated by a red circle and label) and compared with earlier values on a like-for-like basis (avoiding comparing a partially-complete current year with complete previous years).
|Page last rebuilt: 21 Jan 2021|