The Great Oxidation Event (GOE) marked the end of the Archean Eon (4-2.5 Ga) and the start of the Proterozoic Eon (2.5-0.5 Ga) 2.5 Giga years ago (Ga) with a substantial increase in the atmospheric oxygen content and the transition of the Earth surface from reducing to oxidizing conditions. I am interested in understanding the causes of this extraordinary event, which has important implications for the history of the evolution of the Earth's atmosphere and the development of life. Also, I am interested in understanding the effects of this event on climate, which could have important implications for our understanding of the evolution of the Earth and other planet's climate system.

I am interested in the mathematical modeling of atmospheric chemistry processes. The atmosphere's composition varies on short and long time scales due to meteorologic, climatologic, radiative, chemical, and biogeochemical processes. I am interested in using and developing atmospheric chemistry models to understand the variability and evolution of the Earth and other planets' atmospheric composition.

I am interested in using and developing biogeochemical models to investigate the evolution of the interactions between different Earth systems through Earth's history. In particular, I am interested in the coevolution of life and the environment.