PNNL

Abstract

Climate models have changed the world. Starting out as simple globally averaged representations of vertical energy exchanges in the atmosphere in the 1950s, today’s climate models are highly complex numerical representations of the Earth System based on the fundamental laws of physics. Their development has largely been driven by scientific curiosity with the many approximate numerical Earths available today enabling the interrogation of the past and present climate system and the development of an understanding of the influence of human activity on its future. It is this understanding that underpins the climate mitigation targets enshrined in the Paris agreement to limit global mean temperature rises (https://unfccc.int/process-and-meetings/the-paris-agreement).