The University of Arizona

Global Change | The Global Change Graduate Interdisciplinary Program

Chad L. Yost

I am conducting a phytolith and pollen based paleoenvironmental reconstruction using 0-4 Ma paleolake records from East Africa in order to better understand the paleoenvironmental and paleoclimatic context of human evolution. Secondary research: I am developing and promoting the use of grass phytoliths as a precipitation seasonality proxy (e.g. summer, winter, monsoon) with an emphasis on southwestern North America. 

Gloria Jimenez

Gloria Jimenez is a paleoclimatologist interested in linking climate change science with decision making. A Ph.D. student in the Department of Geosciences, her research uses corals from the Galápagos Islands to characterize the behavior of the El Niño-Southern Oscillation (ENSO), with the goal of better understanding how ENSO will respond to climate change. Gloria sees science as an incredibly powerful tool with which to change the world, and hopes never to work in an ivory tower. She is a returned Peace Corps Volunteer who served in Ecuador and holds a B.A.

Paul Szejner

Paul Szejner's research interest relies on the feedbacks between vegetation and climate. He has been developing early and late wood tree ring chronologies in order to understand intra annual processes in the North American Monsoon region. By analysing the carbon and oxygen stable isotopes from tree ring cellulose from several sites in Arizona, Utah, New Mexico and Colorado, we will contribute on the understanding of the role of the temporal and spatial variability of winter and summer rainfall on this region. 

Aaron M. Lien

My research focuses on the use of ecosystem services in
large landscape conservation. I will be investigating the use of a payment
for ecosystem services program to support jaguar habitat in Southern Arizona.
I'm also interested in how climate change models and ecosystem services can
be integrated into conservation prioritization for large landscapes. 

America N. Lutz Ley

America is a Graduate Research Associate with the Udall Center for Studies in Public Policy, and a Ph.D. student in Arid Lands Resource Sciences at the University of Arizona. She has a Master degree in Social Sciences, with major in Public Affairs from El Colegio de Sonora, and a Bachelor degree in Psychology, with major in Educational Psychology from the Universidad de Sonora, both from her country, Mexico.

Kevin E. Bonine

Kevin's past reserach involved work on evolutionary physiology in lizards. Currently he is studying canyon treefrog (Hyla arenicolor) phylogeography, life history, and disease ecology. Other projects include field research on gila monsters (Heloderma suspectum), otoacoustic emissions in vertebrate ears, rattlesnake ecology, etc. His has also been involved in several local inventory and monitoring programs that shed light on changes in local abundance and distribution.

David J.P. Moore

David Moore is a broadly trained plant ecologist and ecosystem scientist. His research centers on the changing role of forests in the carbon cycle and the controls of carbon use and allocation in plants and ecosystems. His research uses a broad range of observation types from ground measurements to satellite remote sensing and focuses of time series of ecosystem processes and the timings of transitions between ecosystem states both seasonally and interannually.


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