in a warming world due to increasing CO2 there will be a statistical increase in “unusually warm” years. But assuming the warming is entirely due to steadily increasing CO2 causing a slight (currently ~1%) energy imbalance in the climate system, then the warming that results is about ~0.02 deg. C per year.

Anything different from that small 0.02 deg. C per year warming is due to natural climate variability. 

An unusually warm year or two cannot be blamed on climate change « Roy Spencer, PhD (drroyspencer.com)

via climate science

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September 17, 2024 at 06:07AM