The University of Arizona

Global Change | The Global Change Graduate Interdisciplinary Program

David J. Schmidtz

David Schmidtz specializes in moral and social philosophy. Current projects include papers on instrumental reason, justice, environmental conflict resolution, civil society and the state, and the purpose of moral theory. He is the Director of the Arizona Center for the Philosophy of Freedom.  He teaches in the Departments of Philosophy and Economics and holds a courtesy appointment in the McGuire Center for Entrepreneurship at Eller College of Management. 

Yolande L. Serra

Yolande Serra specializes in tropical ocean-atmosphere interactions and atmospheric dynamics on daily to multi-year time scales. She is currently researching tropical east Pacific synoptic waves and their relationship to the underlying ocean and larger scale atmospheric circulations. Synoptic waves are the dominant scale of variability in low-level winds, precipitation, and clouds throughout the tropical east Pacific region, and are the primary source of east Pacific hurricanes.

Thomas Sheridan

Thomas Sheridan is the curator of ethnohistory at the Arizona State Museum. His research interests include contemporary ranching and rural development and the political ecology of ranching in the Southwest. His work involves documentary history and ethnographic studies, with projects focusing on a farming community in northwestern Mexico, Arizona history, the Mexican community in Tucson, the northern and southern frontiers of the Spanish empire in the Americas, and the Seri Indians.

James Shuttleworth

Jim Shuttleworth's major research interests include physical processes in hydrology—with an emphasis on evaporation and hydrometeorology—as applied to environment change at local, regional, and global scales. This work includes effects on global climate due to Amazonian deforestation and African desertification. Present research involves the representation of heterogeneous land surfaces in global climate models, the application of remote sensing methods within hydrology, and the micrometeorology of natural semi-arid vegetation and riparian systems in the desert Southwest.

Scott Saleska

Scott Saleska’s research focuses on how climate interacts with plant physiology, demography, and ecological processes to influence or control biogeochemical cycling from local to global scales. Dr. Saleska uses multidisciplinary approaches that combine classical techniques of field ecology and forestry with advanced technological methods and modeling to integrate biogeochemical processes to ecosystem scales. Dr. Saleska also is interested in the effect of human activities on these processes and on the sustainable functioning of the biosphere in general.

Jeffrey C. Silvertooth

As Associate Dean and Director, Extension & Economic Development, Jeffrey Silvertooth provides overall administrative leadership to University of Arizona Cooperative Extension. Specifically, he provides overall program leadership and administrative and personnel management for Arizona Cooperative Extension. The Director is also responsible for the development of an effective Extension education program and all related translational and applied research programs that are dedicated to extending knowledge resources to the people of the state.

Joellen L. Russell

Joellen Russell uses the GFDL global climate model and observational records to study the impact of climate change on interannual variability in the carbon cycle on a variety of timescales. Her research focuses on quantifying the impact of changes in the physical climate system on the fluxes between reservoirs of carbon. One example is her recent work on the shift in the Westerly Winds, which have moved poleward and increased over the last 30 years in both hemispheres, possibly as the first and most ferocious of the impacts of global warming. In the ocean, Dr.

Armin Sorooshian

Armin Sorooshian received his BS from the University of Arizona (Chemical and Environmental Engineering, 2003) and PhD from the California Institute of Technology (Chemical Engineering, 2008). His research focus is on the effect of aerosol particles on environmental and climate change, public health, and renewable energy applications. Of specific focus are the interactions between aerosols, clouds, and precipitation.

Shirley A. Papuga

Shirley Papuga is an interdisciplinary surface water hydrologist. She specializes in fluid dynamics as it relates to eco-hydrological and land-atmosphere interactions. Eddy covariance and Bowen-ratio techniques are key components of her field research. Her primary interest is focused on understanding how vegetation controls energy, water, and carbon cycling in water-limited ecosystems.

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