The hydrological impact of enhancing Earth's albedo by solar radiation management is
investigated using simulations from 12 Earth System models contributing to the
Geoengineering Model Intercomparison Project (GeoMIP). We contrast an idealized
experiment, G1, where the global mean radiative forcing is kept at preindustrial conditions
by reducing insolation while the CO2 concentration is quadrupled to a 4× CO2 experiment.
The reduction of evapotranspiration over land with instantaneously increasing CO2 …

The hydrological impact of enhancing Earth's albedo by solar ra-24 diation management is
investigated using simulations from 12 models contribut-25 ing to the Geoengineering
Model Intercomparison Project (GeoMIP). We con-26 trast an idealized experiment, G1,
where the global mean radiative forcing is kept 27 at pre-industrial conditions by reducing
insolation while the CO2 concentration 28 is quadrupled, to a 4xCO2 experiment. Global
average temperature in G1 is pre-29 served at its pre-industrial value, but precipitation is …