“Carbon dioxide’s logarithmic heating effect is weak at 100 ppm, tuckered out well and truly at 200 ppm and beyond 300 ppm – well never mind. We are now above 400 ppm from which it is a monotonic 0.1°C for each 100 ppm increase. That doesn’t explain anything and in turn leaves the Sun as the only possible causative agent for the Modern Warm Period.”
Reblogged this on Climate Collections.