Earth system models (ESMs) integrate the interactions of atmosphere, ocean, land, ice, and biosphere to estimate the state of regional and global climate under a wide variety of conditions.
Earth and Planetary Science Letters 258, 486–499 (2007). Berner, R. A. Phanerozoic atmospheric oxygen: New results using the GEOCARBSULF model. American Journal of Science 309, 603–606 (2009).