Cours #2 : Radiation • Overview Earth radiation Budget (Trenbergh et al., 1997 and 2008) • Climate forcings and feedback mechanisms • Earth Radiation Budget at regional scale (from CERES EBAF) • The GERB project (hsaf.ppt / Lille.ppt ) • Exercices : use of LibRadTran to simulate solar and thermal radiation.
GPCP 76 W m-2 2000-2005 Trenberth et al 2009
Radiative Forcing from 1750 to 2000 Anthropogenic Forcings IPCC, 2001
How does the Earth Respond? Earth System Response Forces Acting On the Earth System IMPACTS Feedback Of the total forcing of the climate system, 40% is due to the direct effect of greenhouse gases and aerosols, and 60% is from feedback effects, such as increasing concentrations of water vapor as temperature rises.