Evolution of Climate Models

This lecture covers the evolution of climate models, from the early general circulation models to the latest assessment reports. It discusses the estimation of climate sensitivity, the impact of greenhouse gases, and the role of emergent constraints in climate projections. The instructor explains the concept of equilibrium climate sensitivity and the methods used to derive it, such as the Gregory method. The lecture also delves into the challenges of constraining climate sensitivity from observations and the importance of paleoclimate records. It concludes with an overview of the IPCC reports, including the latest AR6 findings on climate change scenarios and their implications for the future.