I'm a scientist interested in Earth's climate system. Most of my work is focussed on the oceans, their physics, biology, chemistry and variability on decadal to millennial time scales. I try to understand the causes for today's global deep overturning circulation, how and why it has changed in the past, how it may change in the future due to natural or human influences, how it impacts climate, ecosystems and biogeochemical cycles including isotopes. Click on the PROJECTS link above to find out more about current projects. I develop, improve, analyze, and use numerical (computer) models. The code I develop is available and free for everybody do download and use. Click on the MODELS link above or contact me if you're interested. Here is an interview about my life and career as part of OSU's Voices of a Warming Planet project.


I'm looking for a graduate student interested in working on modeling global ocean circulation and the cycling of Neodymium. If you have a good physical sciences and math background, if you're interested in numerical modeling, climate and paleoceanography this is the project for you. Contact me for questions and/or apply to our graduate program in Ocean, Earth, and Atmospheric Sciences.

Just Published

  • Muglia, J., and A. Schmittner (2021)
    Carbon Isotope Constraints on Glacial Atlantic Meridional Overturning: Strength vs Depth
    Quaternary Science Reviews, doi: 10.1016/j.quascirev.2021.106844
  • Cliff, E., S. Khatiwala, and A. Schmittner (2021)
    Glacial deep ocean deoxygenation driven by biologically mediated air–sea disequilibrium