1. Department of Earth and Atmospheric Sciences, University of Nebraska–Lincoln, Lincoln, Nebraska
2. Department of Geosciences, Auburn University, Auburn, Alabama
3. Department of Earth and Atmospheric Sciences, University of Northern Colorado, Greeley, Colorado
4. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia
5. School of Natural Resources, University of Missouri, Columbia, Missouri
6. Department of Earth Sciences, California University of Pennsylvania, California, Pennsylvania