[A-CG36] Extratropical oceans and atmosphere

[ACG36-13] Aerosol-Cloud Interactions and Earth’s Energy Imbalance: Recent Key Findings and Implications

★Invited Papers

*Takuro Michibata¹ (1.Kyushu University)

Keywords:Aerosol-Cloud Interactions, Earth Energy Imbalance, Radiative Forcing, Climate

Aerosol-cloud interactions (ACI) are among the most uncertain processes in global models and observations. The magnitude of the effective radiative forcing due to ACI (ERFaci) is assessed to be -1.0±0.7 W m^-2 in the IPCC Sixth Assessment Report. This negative aerosol forcing partly offsets the positive radiative forcing due to the anthropogenic GHGs, and therefore the wide range of the estimated ERFaci directly links to the accuracy of future climate prediction. Recent studies have shown that reductions in anthropogenic aerosol emission accelerate warming due to the removal of the negative aerosol forcing, which is consistent with the net radiative flux at the top-of-the-atmosphere, the so-called Earth’s energy imbalance (EEI). In this presentation, I would like to discuss how aerosols and clouds have contributed to the recent EEI trend during the past two decades (i.e., satellite era), from perspectives of modeling and observations.