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 project start, and then many years later see the results actually emerge and done better than you could have imagined. Especially one as challenging...

This month’s open thread on climate topics. Try to be constructive! The post Unforced Variations: Sep 2024 first appeared on RealClimate.

A recent paper suggested that ‘climate sensitivity’ derived from a new paleo-CO2 record is around 7.2ºC (for equilibrium climate sensitivity ECS) and ~13.9ºC (Earth System Sensitivity – ESS) for a doubling of CO2. Some press has suggested that this means that “Earth’s Temperature Could Increase by 25 Degrees” (F). Huge if true! Fortunately these...

How should we allocate resources for climate modelling if the goal is to improve climate-related decisions? Higher resolution, machine learning and/or storylines? A call for a deeper discussion on how we should develop the climate modelling toolbox. Guest post by Marina Baldissera Pacchetti, Julie Jebeile and Erica Thompson ...

This month’s open thread on climate topics. The post Unforced variations: Aug 2024 first appeared on RealClimate.

This month’s open thread on climate science topics. The post Unforced variations: July 2024 first appeared on RealClimate.