The University of Arizona

Global Change | The Global Change Graduate Interdisciplinary Program

Thomas Swetnam

Thomas Swetnam's primary interests are the applications and teaching of dendrochronology in environmental sciences. He is also keenly interested in the applications of forest and disturbance ecology to land management. He conducts research in forest disturbance history and forest ecology, using tree rings to reconstruct histories of forest fires, insect outbreaks, forest age structures, and climatic variations.  He is the Director of the Laboratory of Tree-Ring Research.

Jonathan T. Overpeck

Jonathan Overpeck is co-director of the Instittue of the Environment (with Diana Liverman) and has active research programs in North America, South America, Africa monsoon Asia, and Australia - most commonly focused on providing paleoenvironmental and climate modeling insights on how key aspects of the Earth’s climate system may change in the future. Although much of Peck's work focuses on terrestrial system, he has also participated research cruises to the Arabian Sea, and tropical Atlantic.

Mary Kay O'Rourke

Mary Kay O'Rourke's research involves environmental exposure assessment, including human exposure to metals, pesticides, volatile organic compounds (VOCs), polycyclicaromatic hydrocarbons (PAHs), bioaerosols, pollen, and mold. Her research interests also include air quality, allergens, asthma, and exposure of children to pesticides. Her expertise is in environmental health, epidemiology, immune diseases, and maternal and child health.

John W. Olsen

John Olsen's research involves cultural ecology and environmental archaeology. He has studied Eastern hemisphere prehistory with a temporal and geographical focus on the Paleolithic archaeology of Central and East Asia, and the impact of environmental degradation on prehistoric societies in arid zones. His work also involves spatial analysis in archaeology, including applications of remote sensing and geographic information systems.

Valerie M Trouet

Valerie Trouet's research  involes (1) decreasing uncertainty in large-scale temperature and regional hydroclimate reconstructions, (2) developing more high-resolution climate reconstructions for the Southern Hemisphere and for tropical regions, and (3) reconstructing dynamical climate patterns and their interaction with ecosystems. She has collaborated in various projects that have focused on the first aspect, but her personal research interests have mainly focused on the latter two topics.

Jay F. Nunamaker

Dr. Jay Nunamaker is Regents and Soldwedel Professor of MIS, Computer Science and Communication.  He is Director of the Center for the Management of Information and the National Center for Border Security and Immigration (BORDERS) at the University of Arizona.

Juan B. Valdes

Juan Valdes' research interests include stochastic and deterministic hydrology, flood forecasting, mathematical models of natural resources systems, modeling of space-time precipitation, environmental risk assessment, and stochastic modeling of environmental processes.

Katherine G. Morrissey

Katherine Morrissey’s research on the North American West focuses on the region’s environmental, social, cultural, and intellectual history. She is currently writing a book on environmental mining conflicts in the early twentieth century, examining the legal, scientific, and political struggles over mining debris and smelter smoke pollution.

Robert Varady

Robert Varady has examined environmental and water-management policy in arid regions—with a transboundary emphasis—especially in the U.S.-Mexico border area.  He has studied transboundary aquifer governance and is a consultant to UNESCO and FAO the GEF-FAO global groundwater governance project.  Varady has more than 100 publications on environmental history and policy and is past president of the International Water History Association (IWHA).

Marc L. Miller

Marc Miller’s environmental work highlights topics at the intersection of law and biology, with special attention to the concepts of conservation and sustainability, and to the relationship between science and environmental policymaking and environmental decisions.

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