Assessment on the efficacy of Solar Radiation Management bears the policy relevance in this Chapter 7. As stated in the Executive Summary :

 

"Theory, model studies and observations suggest that some Solar Radiation Management (SRM) methods, if practicable, could substantially offset a global temperature rise and partially offset some other impacts of global warming, but the compensation for the climate change caused by GHGs would be imprecise (high confidence)"

 

    This chapter doesn’t appear to be instantly appealing to the policymakers due to its technical nature. Other than the SRM strategies, the policymakers should find interest in section 7.5 “Radiative Forcing and Effective Radiative Forcing by Anthropogenic Aerosols”. However, they should realize that the uncertainties in clouds/aerosols radiative forcing assessment have a direct impact on the future climate change projections, both short term and long term.

 

From my personal point of view, since the poor representation of cloud fields and aerosol-cloud interactions in climate models has

i). significantly limited the current climate models’ accuracy in evaluating on Earth’s energy budget;

ii). impacted on correct assessment of anthropogenic radiative forcing;

iii). impacted on correct projection of future changes in hydrological cycle and precip. pattern/intensity;

 

So, hopefully, this assessment on clouds and aerosol studies in climate research can draw some attention from policymakers to invest more on process studies and field observations.