Zhang, J., Emmons, L., Orlando, J., Buchholz, R. R., Gaubert, B., Honomichl, S., et al. (2026). Development and evaluation of the simplified tropospheric chemistry mechanism T4 in the Community Earth System Model (CESM) for climate simulations. Journal of Advances in Modeling Earth Systems, 18, e2025MS005640. https://doi.org/10.1029/2025MS005640