Green’s functions quantify the sensitivity of globally averaged top-of-atmosphere radiation (and its individual feedback components) to changes in the sea surface temperature of individual geographic locations. Combining them with any given pattern of surface temperature anomalies provides an estimate of the global radiative feedbacks in response to that pattern. They are particularly helpful for quantifying how feedbacks vary with surface temperature anomaly patterns. The Green’s functions provided here were constructed by performing a series of experiments with the Community Atmosphere Model version 5 (CAM5) in which individual patches of the ice-free oceans were warmed. See Zhou et al. (2017) for further details.
Zhou, C., M. D. Zelinka, and S. A. Klein, 2017: Analyzing the dependence of global cloud feedback on the spatial pattern of sea surface temperature change with a Green’s Function approach, J. Adv. Model. Earth Syst., 9, 2174–2189, doi:10.1002/2017MS001096.