Slightly more thoughts on this at RealClimate: www.realclimate.org/index.php/ar...

Phantastic Job!

A truly impressive paper was published this week with a new reconstruction of global temperatures over the last ~500 million years. There is something tremendously satisfying about seeing a proj...

Cool! Thanks. Tomkins et al let a meteor break up 466Ma, its debris forms a ring around Earth like Saturn's, and cools °C. Judd's new temperature paper www.science.org/doi/10.1126/... doesn't have a °C valley at 466Ma, tho a long one from 450Ma. Maybe the many ring rocks caused many Chicxulubs-eq?

Evidence suggesting that earth had a ring in the Ordovician

All large planets in our Solar System have rings, and it has been suggested that Mars may have had a ring in the past. This raises the question of whe…

Perhaps silly, but land ice cover seems to change fast, could that affect the climate sensitivity, and make it variable even over shorter periods of time?