1. Cary Institute of Ecosystem Studies, Millbrook, NY 12545
2. IBM Research - Thomas J. Watson Research Center, Yorktown Heights, NY 10598
3. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964
4. U.S. Geological Survey, Water Resources Mission Area, Integrated Information Dissemination Division, San Francisco, CA 94116