1. National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory; Ann Arbor Michigan USA
2. Department of Civil and Environmental Engineering; University of Michigan; Ann Arbor Michigan USA
3. Department of Geography; University of Colorado, Boulder; Boulder Colorado USA
4. Cooperative Institute for Limnology and Ecosystems Research, University of Michigan; Ann Arbor Michigan USA
5. School of Natural Resources and Environment; University of Michigan; Ann Arbor Michigan USA