1. Department of Geological Sciences; University of Florida; Gainesville Florida USA
2. School of Environmental and Forest Sciences and Civil and Environmental Engineering; University of Washington; Seattle Washington USA
3. School of Forestry and Environmental Studies; Yale University; New Haven Connecticut USA
4. Marine Sciences Laboratory; Pacific Northwest National Laboratory; Sequim Washington USA
5. Department of Geosciences; University of Arizona; Tucson Arizona USA
6. Departamento de Hidrologica; Universidad Autónoma de Baja California; Mexicali Mexico