1. Department of Earth, Atmospheric, and Planetary Sciences Purdue University West Lafayette IN USA
2. Department of Agronomy Purdue University West Lafayette IN USA
3. LERMA/Observatoire de Paris, UPMC, CNRS Paris France
4. Columbia Water Center Columbia University NY New York USA
5. Estellus Paris France
6. Department of Earth and Environmental Sciences Lehigh University Bethlehem PA USA
7. Institute for Mire and Peat Research, School of Geographical Sciences Northeast Normal University Changchun China
8. Schmid College of Science and Technology Chapman College Orange CA USA
9. Institute of Ecology & Evolution University of Oregon Eugene OR USA