This is a head shot of Paul with gray background. He is wearing an unbuttoned blue button down shirt and beige jacketPaul Hanson

Distinguished Research Professor
UW-Madison Center for Limnology
pchanson@wisc.edu

I explore how climate change, land use, and human activity affect our lakes and rivers, as well as how AI and collaborative science are transforming freshwater research worldwide. Beyond my work in science, I also study the intersection of art and research, particularly through my my passion for music.

Inland Waters


Lake Mendota from a distance showing docks and lots of people along the shore in front of Memorial UnionOur research aims to understand how lakes and reservoirs provide critical resources around the world and how they respond to the pressures of changing climate, land use, and human populations.

Water Quality


Q person is holding and looking at a piece of water sampling equipment. She's wearing sunglasses and a life vest. There's wood in the distance and other people standing near her looking at her.We study water quality at the ecosystem level, examining both individual lakes and entire regions. Our research explores key processes like nutrient cycling, anoxia, harmful algal blooms, and carbon storage and processing—all of which play a vital role in maintaining healthy aquatic environments.

Team Science


Smnall photo of large group of people clustered together all looking up at the camera. There's a lake in the backgroundDiverse, interdisciplinary, and international teams are essential for tackling environmental challenges on both regional and global scales. Collaboration is at the heart of our approach, shaping both our scientific research and training programs.

Knowledge Guided Machine Learning


Our team is leading the way in integrating AI with aquatic ecology, advancing research on AI applications in metadata and ecosystem modeling. We pioneered Ecology Knowledge-Guided Machine Learning (Eco-KGML), a rapidly growing field that is shaping ecological research in labs worldwide.

Research Projects

Collaborative project among multiple universities for combining lake models with machine learning

Eco-Knowledge Guided Machine Learning: A Macrosystems Project for Lake Water Quality

Collaborative project with Virginia Tech on regional-scale water quality modeling, using modular compositional learning

Environmental Data Initiative (EDI)

The NSF-funded data curation and archiving service for the NSF Division of Environmental Biology

Global Lake Ecological Observatory Network (GLEON)

Advancing lake ecology by building an international community to exploit innovations in sensor network technology

North Temperate Lakes Long Term Ecological Research Program (NTL LTER) 

The flagship lake research program of the Center for Limnology.

Lake Expedition 2022 

Graduate student cohort training in team science and big data