Welcome to the UCI Department of Earth System Science.

Photo of ESS Department Chair, Gudrun Magnusdottir

Earth System Science (ESS) at the University of California, Irvine focuses on the science of the Earth as a system and how the atmosphere, land and oceans interact and manifest variability and change approximately over the human lifetime. 
We envision a society that understands both the impact of human activities on the global environment and the interactions within the Earth system that preserve the habitability of the planet. Our faculty, students and staff lead groundbreaking work in key areas of climate science, including biogeochemistry of the ocean and atmosphere, climate dynamics, atmospheric science, studies of Earth’s ice sheets, the global water cycle, terrestrial and marine ecosystems and human systems.
Please explore our site to learn more about who we are and what we do.


Gudrun Magnusdottir

Chair and Professor of Earth System Science