Global average surface temperatures have risen by 1.2-1.3C since pre-industrial times and continue rising at 0.02-0.03C per year, according to most data-sets . This note assesses their methodologies and controversies. Uncertainty in the data is likely higher than admitted. But the strong upward warming trend is robust.
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Global average temperatures: are the data robust and reliable?
Global average surface temperatures have risen by 1.2-1.3C since pre-industrial times and continue rising at 0.02-0.03C per year, according to most data-sets . This note assesses their methodologies and controversies. Uncertainty in the data is likely higher than admitted. But the strong upward warming trend is robust.