Dr. Bales received his B.S. from Purdue University in 1974, an M.S. from the UC, Berkeley in 1975, and his Ph.D. from the California Institute of Technology in 1985. He worked as a consulting engineer from 1975 to 1980, and was professor of hydrology and water resources at the University of Arizona from 1984-2003. He has published extensively in diverse fields of research including snow hydrology, alpine hydrology and biogeochemistry, polar snow and ice, contaminant hydrology, and water quality. At the University of Arizona Dr. Bales served as director of the NASA-supported Regional Earth Science Applications Center (RESAC), deputy director of the NSF-supported Science and Technology Center on Sustainability of Semi-Arid Hydrology and Riparian Areas (SAHRA), and principal investigator on the NOAA-supported Climate Assessment for the Southwest Project (CLIMAS). He is actively involved in research in the southwestern United States, Greenland, and Antarctica. Dr. Bales is a Fellow of the American Association for the Advancement of Science (AAAS), of the American Geophysical Union (AGU), and the American Meteorological Society (AMS). He serves on a number of advisory committees and professional society boards.

LAWRENCE E. BAND is chair and Voit Gilmore Distinguished Professor of Geography at the University of North Carolina. He received a B.A. in geography from the State University of New York at Buffalo, summa cum laude, in 1977, and an M.S. and Ph.D. in geography from the University of California, Los Angeles, the latter in 1983. His research interests are watershed hydrology, ecology, geomorphology, geographic information systems (GIS), remote sensing, structure, function, and dynamics of watershed systems. Dr. Band combines field measurement and observation of hydrological and ecological variables with development and application of distributed simulation models, GIS, and remote sensing techniques. His projects are particularly concerned with the integration and coupling between water, carbon, and nutrient cycling and transport with watersheds, and the interactions of human behavior as part of watershed ecosystems. He is chair of the Consortium of Universities for the Advancement of Hydrologic Science Committee on Hydrologic Observatories.

ELFATIH A. B. ELTAHIR is a professor in the Department of Civil and Environmental Engineering at the Massachusetts Institute of Technology (MIT). Dr. Eltahir received the Presidential Early Career Award for Science and Engineering. He was nominated by the National Aeronautics and Space Administration for the honor based on his work in hydroclimatology. The award cites Professor Eltahir’s “outstanding accomplishment in hydrology and hydroclimatology by combining theory and remote sensing observations to better understand the links between the biosphere and the atmosphere and their implications for regional water resources in the tropics.” He is a past member of the executive committee of the hydrology section of the American Geophysical Union (AGU). He was also editor of Geophysical Research Letters from 1998 to 2001. Dr. Eltahir re-

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