Arid and semi-arid lands, such as those in Arizona, occupy more than 40% of the Earth’s land surface. These landscapes contain forests, grasslands, agricultural, and built environments that may be affected by increased temperature and prolonged drought.

Our faculty are experts in:

  • arid zone hydrology 
  • dust production and human exposures
  • energy balance and soil/ecosystem response 
  • drought resiliency planning 
  • regional meteorology and climatology

Click on the profiles to learn more about who we are and what we research in climate change and drought impacts.


Paul W. Brown

Emeritus Professor

Assistant Dean, Cooperative Extension

Associate Director, Programs

Research Scientist


Karletta Chief

Associate Professor

Extension Specialist


Jon Chorover

Jon Chorover

Department Head


Arizona Lab for Emerging Contaminants (ALEC)



Raina M. Maier

Raina M. Maier


Director, UA Superfund Research Program


Monica Diane Ramirez-Andreotta

Mónica Ramírez-Andreotta

Assistant Professor

Director, Project Harvest

Director, Gardenroots



Marcel Schaap

Marcel G. Schaap


Graduate Program Head

  • I focus on regional meteorology and climatology and energy balances in our ecosystems (soil/ecosystem response) in our work on climate change and drought impacts.
  • Explore my other areas of research


James Walworth

James "Jim" Walworth


Extension Specialist

(retired) Associate Department Head