The University of Arizona

Global Change | The Global Change Graduate Interdisciplinary Program

Xubin Zeng

Xubin Zeng's major research interests include land-atmosphere interaction, ocean-atmosphere interaction, and the seasonal to interannual variability of the climate system based on in situ and remote sensing data analysis as well as large-eddy, mesoscale, and global modeling.

Diana Liverman

Diana Liverman is a Regents' Professor in the School of Geography and Development. Her research has focused on the human dimensions of global environmental change and her main research interests include climate impacts, vulnerability and adaptation, and climate policy and mitigation especially in the developing world. She also works on the political economy and political ecology of environmental management in the Americas, especially in Mexico.

Steven Leavitt

Steven Leavitt applies stable isotope methods toward resolution of questions related to global and regional change. Isotope dendrochronology provides a novel instrument for reconstructing past environments.  Current tree-ring research is aimed at monsoon moisture in the U.S. Southwest from carbon and oxygen isotopes in ponderosa pine and Douglas-fir, drought from carbon isotopes in western tree rings, cool-season temperature from oxygen isotopes in western tree rings, and high-resolution environment in the Great Lakes area from 6000 to 14,000 years ago using tree rings.

Dennis L. Larson

Dennis Larson's research involves use of electrokinetics to manage chemicals in soils, energy use management, equipment repair and maintenance policies, and optimal allocation of resources.

A.J. Timothy Jull


Timothy Jull is a senior research scientist with the Department of Geosciences at the University of Arizona. He also is director of the UA's Accelerator Mass Spectrometer Laboratory, addressing a variety of problems in geochemistry, geophysics, andarchaeology. He has been involved in studies of radiocarbon in extraterrestrial materials, such as meteorites and lunar samples.

John Paul Jones

John Paul Jones III is Dean of the College of Social and Behavioral Sciences and a  professor in the Department of Geography and Regional Development. Most of his research has addressed theories of social space, with particular attention to theoretical and methodological issues, such as the place of objectivity in social analysis, technical aspects of spatial modeling, and the geographic study of organizations, representations, identity, and resistance. He is the past editor of the Annals of the Association of American Geographers.

Charles F. Hutchinson

Chuck Hutchinson (now retired) is a geographer with specializations in arid lands and remote sensing. His research focused on (1) developing inventory and monitoring techniques for agriculture and natural resources using satellite, air-borne and ground-based observing systems, and (2) advancing policies that promote the use of satellite data.

Malcolm Hughes

Malcolm K. Hughes studies how and why climate varies on interannual to century time scales. Specific areas of interest include past climate in Europe, Asia, and the Sierra Nevada, as indicated by tree rings; fine detail of wood structure revealed bymicrodensitometry; and the potential of 3,000-year-old and older giant sequoia as proxy climate records. He is also a collaborator in an effort to improve knowledge of the Earth's climate since AD 1000 from tree rings, ice cores, laminated sediments, and historical records.

Lon L. Hood

Lon Hood's research currently focuses on gas-grain interactions in the early solar nebula, geophysical studies of the Moon and Mars, and satellite data studies of the Earth's stratosphere. The stratospheric work consists of analysis and interpretation of satellite remote sensing data relevant to long-term variability. The relative importance of dynamics and chemistry in producing observed ozone trends at northern midlatitudes is a major topic of current research.


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