About the Authors

Sergei Katsev

skatsev@d.umn.edu.

Affiliations Large Lakes Observatory, University of Minnesota Duluth, Duluth, Minnesota, United States of America, Department of Physics, University of Minnesota Duluth, Duluth, Minnesota, United States of America

Arthur A. Aaberg

Affiliation Department of Physics, University of Minnesota Duluth, Duluth, Minnesota, United States of America

Sean A. Crowe

Affiliation Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada

Robert E. Hecky

Affiliations Large Lakes Observatory, University of Minnesota Duluth, Duluth, Minnesota, United States of America, Department of Biology, University of Minnesota Duluth, Duluth, Minnesota, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SK. Performed the experiments: SK AAA SAC REH. Analyzed the data: SK AAA. Contributed reagents/materials/analysis tools: SK SAC REH. Wrote the paper: SK SAC REH.