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Matthew L. Allen, PhD
Ecohydrology | Past and Present Climate | Isotope Geochemistry

WELCOME
I'm an ecohydrologist and isotope geochemist who studies how water moves through landscapes and how life depends on it. Calling an environment "wet" or "dry" can mean many different things, so I use stable isotopes to trace where water actually goes and what it does along the way, from plants to whole landscapes and from a single growing season to millions of years.
I'm especially interested in how global warmth reorganizes water across Earth's continents, which remains one of the least certain parts of climate projection. My goal is to provide quantitative benchmarks that improve how Earth system models simulate regional continental hydroclimate under warming. To do this, I reconstruct how water moved through landscapes in the North American interior during past greenhouse climates, from the mid-Cretaceous hothouse to the Paleocene–Eocene Thermal Maximum, and what those changes meant for carbon and life. I also measure the same processes today, such as separating evaporation from plant transpiration in coastal salt marshes at the Plum Island Ecosystems LTER in the Great Marsh of Massachusetts. Together, these geological and modern approaches show how ecosystems respond to environmental change and why that matters for water resources today.
I'm a Postdoctoral Associate in Environmental Sciences at the University of Toledo, working on the CMarsh project with Dr. Inke Forbrich. Before that, I was an NSF EAR Postdoctoral Fellow at the University of Michigan. I believe Earth science belongs at the forefront of building a sustainable future.
This site shares highlights of my research, teaching, and outreach. I hope you'll explore, reach out, and join the conversation.
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