Category Archives: NOAA

Temperature data averaged 3 ways

How should you calculate annual global temperature data? We start with Hadcrut4.5 gridded monthly data defined on a 5×5 degree grid and then form the global area weighted average in 3 different ways. Integrate the annual anomaly  over month,lat & … Continue reading

Posted in AGW, Climate Change, climate science, NOAA, UK Met Office | Tagged , | 9 Comments

Land Temperature Anomalies.

This post studies the methodologies and corrections that are applied to derive global land temperature anomalies. All the major groups involved use the same core station data but apply different methodologies and corrections to the raw data. Although overall results are … Continue reading

Posted in AGW, Climate Change, NOAA, UK Met Office | 71 Comments

Climate Models compared to Hadcrut4

Estimates of future climate change are based on the mean ‘projection’ across an ensemble of models. This is based on an assumption that each model is equally likely, but is that really true?  Surely it is far more likely that just one of the models … Continue reading

Posted in AGW, Climate Change, climate science, GCM, Institiutions, IPCC, NOAA, Science | Tagged , | 23 Comments