Kriging biases in global temperature data

From Clive Best:

Kriging biases in global temperature data

Summary:  “Does kriging actually improve the accuracy of global temperatures? While it is probably correct that Hadcrut4 has a ‘coverage bias’ over polar regions, what is even clearer is that interpolation to remedy this can itself introduce a systematic warming bias dependent on method and target grid size. The other temperature series all use data infilling based on ‘kriging’ type techniques.”

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