Full Title | Development of aerosol radiative forcing simulation in E3SM: improving aerosol wet removal and tunings |
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First Author |
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All Authors | Yunpeng Shan, Jiwen Fan, Kai Zhang, Jacob Shpund, Guang J. Zhang, Xiaoliang Song, Christopher Terai, Shaocheng Xie, Richard C. Easter, Hailong Wang, Xiaohong Liu |
Topic | Atmosphere |
Project | E3SM |
Abstract | Anthropogenic aerosol effective radiative forcing (ERFaer) is an important metric to quantify aerosol effects on climate in Earth system models. Department of Energy’s Energy Exascale Earth System Model (E3SM) tends to overestimate ERFaer, direct forcing (ERFari), and indirect forcing (ERFaci), and one important reason is the significantly overestimated aerosol burden and lifetime. The insufficient aerosol wet removal is attributed to the aerosol overestimation. We improved the aerosol wet removal treatments in E3SM and tuned the hygroscopicity of black carbon, leading aerosol burdens well sit within the reference value ranges. Consequently, the ERFari significantly decreases to reasonable values and ERFaci also decreases. Tuning of cloud sensitivity to aerosols and imposing cloud droplet number can further decrease ERFaci. As a result, the total aerosol forcing and its components have been well within the reference ranges. |
In-person | Yes |
Poster | Add a poster or a presentations here |
Discussion Link | Add a link to your chosen place for discussion: either slack link, public google doc link or email address |
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