About the Authors

Fred D. Tillman

Roles Conceptualization, Formal analysis, Investigation, Writing – original draft, Writing – review & editing

ftillman@usgs.gov

Affiliation U.S. Geological Survey, Arizona Water Science Center, Tucson, Arizona, United States of America

Jessica R. Anderson

Contributed equally to this work with: Jessica R. Anderson, Joel A. Unema, Thomas P. Chapin

Roles Investigation, Writing – original draft, Writing – review & editing

Affiliation U.S. Geological Survey, Arizona Water Science Center, Flagstaff, Arizona, United States of America

Joel A. Unema

Contributed equally to this work with: Jessica R. Anderson, Joel A. Unema, Thomas P. Chapin

Roles Investigation, Writing – original draft, Writing – review & editing

Affiliation U.S. Geological Survey, Arizona Water Science Center, Flagstaff, Arizona, United States of America

Thomas P. Chapin

Contributed equally to this work with: Jessica R. Anderson, Joel A. Unema, Thomas P. Chapin

Roles Investigation, Writing – original draft, Writing – review & editing

Affiliation U.S. Geological Survey, Geology, Geophysics and Geochemistry Science Center, Denver, Colorado, United States of America

Competing Interests

The authors have declared that no competing interests exist.