Abstract | Anthropogenic emissions of aerosols and precursor compounds are known to significantly affect the energy balance of the Earth-atmosphere system, alter the formation of clouds and precipitation, and have substantial impact on human health and the environment. The Emissions Model Intercomparison (Emissions-MIP) project has examined the sensitivity to a set of emission perturbations of 11 climate and chemistry models, including the atmospheric component of E3SMv1 (Ahsan et al. 2023, EGUsphere). The assumed height of SO2 injection has the largest overall impacts, particularly on global mean net radiative flux (maximum difference of -0.35 W m-2), SO2 lifetime over northern hemisphere land (maximum difference of 0.8 days), surface SO2 concentration (up to a 59% decrease), and near-surface sulfate concentration (up to a 23% increase). The results imply a need to assure that anthropogenic emission injection height is accurately and consistently represented in global models. There is a wide range of sensitivities, and this presentation will highlight the E3SMv1 results in comparison to other models. Reference: Ahsan, H., Wang, H., Wu, J., Wu, M., Smith, S. J., Bauer, S., Suchyta, H., Olivié, D., Myhre, G., Matsui, H., Bian, H., Lamarque, J.-F., Carslaw, K., Horowitz, L., Regayre, L., Chin, M., Schulz, M., Skeie, R. B., Takemura, T., and Naik, V.: The Emissions Model Intercomparison Project (Emissions-MIP): quantifying model sensitivity to emission characteristics, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-604, 2023. |
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