Monthly Archives: February 2017

Kriging of Hadcrut4.5 data

Here  is the result of a Gaussian ‘kriging’ of  Hadcrut4.5 temperature anomalies for February 2016. This is essentially what Cowtan & Way do. This clearly shows why the global average of the kriged data gives larger values than Hadcrut4.5 when anomalies at … Continue reading

Posted in AGW, Climate Change, climate science, UK Met Office | Tagged | 13 Comments

Cowtan & Way airbrushing

The Cowtan & Way version of Hadcrut4 uses a kriging technique to extrapolate values into those parts of the world where there are no direct measurements. Originally I had assumed that this fit was guided by the use of UAH … Continue reading

Posted in AGW, Climate Change, climate science, UK Met Office | Tagged | 11 Comments

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