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John, congratulations for the friendly email! (wondering actually who you emailing next:) Glad to see a .pl making headlines! You obviously spent some time wit
by yannis 17y ago
John, congratulations for the friendly email! (wondering actually who you emailing next:) Glad to see a .pl making headlines! You obviously spent some time with the data and I would appreciate it, if you can shed some light on the 'average'. Does the average really represent a fair average over the earth's surface? How is it exactly calculated? Are the met files raw data or is it data that has gone through some homogeneity tests?
- jgrahamc 17y agoI don't think I can really do your questions justice. I would suggest as a first port of call the paper that describes how the Met Office generates CRUTEM and HADCRUT. Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850 P. Brohan, J. J. Kennedy, I. Harris, S. F. B. Tett & P. D. Jones http://hadobs.metoffice.com/crutem3/HadCRUT3_accepted.pdf http://hadobs.metoffice.com/crutem3/HadCRUT3_accepted.pdf That paper is long and covers how the Met Office generates the trend data you see, how the data is modified and gridded, how error estimates are generated, etc.
- yannis 17y agoThanks