Climate damages, temperature changes - IFs

Building upon global temperature change, the grid analysis of the MAGICC/SCENGEN system (version 5.3), which draws upon a great many Atmospheric-Ocean General Circulation Models (AOGSMs), was used to build computational formulations for country-specific values of temperature and precipitation change relative to the average during the 1980-1999 period.  For the agriculture model those changes in average country temperatures and precipitation in turn affect country-specific agricultural yields (considering also possible carbon fertilization impact). Drawing upon the Nordhaus quadratic formulation, the model also computes a climate impact variable (CLIMECONIMP) that represents the country-specific, economy-wide impact of temperature change on GDP.