Articles | Volume 17, issue 5
Atmos. Chem. Phys., 17, 3339–3356, 2017
https://doi.org/10.5194/acp-17-3339-2017

Special issue: The Geoengineering Model Intercomparison Project (GeoMIP):...

Atmos. Chem. Phys., 17, 3339–3356, 2017
https://doi.org/10.5194/acp-17-3339-2017
Research article
08 Mar 2017
Research article | 08 Mar 2017

Shortwave radiative forcing, rapid adjustment, and feedback to the surface by sulfate geoengineering: analysis of the Geoengineering Model Intercomparison Project G4 scenario

Hiroki Kashimura et al.

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Short summary
This study analyses shortwave radiation (SW) in the G4 experiment of the Geoengineering Model Intercomparison Project. G4 involves stratospheric injection of 5 Tg yr−1 of SO2 against the RCP4.5 scenario. The global mean forcing of the sulphate geoengineering has an inter-model variablity of −3.6 to −1.6 W m−2, implying a high uncertainty in modelled processes of sulfate aerosols. Changes in water vapour and cloud amounts due to the SO2 injection weaken the forcing at the surface by around 50 %.
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