Royal Society University Research Fellow Andy Ridgwell models the atmosphere and seas with computers to help us understand the dynamics of our changing climate. “We do not have spare copies of our planet on which to experiment and test ideas about the causes of global change and how atmospheric CO2 is regulated,” Ridgewell said, which is why models of physical, chemical, biological, and human processes are essential. At the University of Bristol (UK) he and a team are designing the Grid ENabled Integrated Earth system model.