john graham-cumming analyzes climate data

Mathematician and programmer John Graham-Cumming has taken a look at the climate data compiled by the Met Office, the UK’s National Weather Service.

He has reconstructed the temperature trends since 1850, found an error in the Met Office's data, examined the "very artificial correction" to tree-ring data, mapped a grid of global temperature data, and produced an explanatory video:



All in all, it's a very thorough and informative analysis.

Here are the papers referenced in his video and blogs (PDF files):

Uncertainty estimates in regional and global observed temperature changes

Hemispheric and Large-Scale Surface Air Temperature Variations

Trees tell of past climates: but are they speaking less clearly today?