People A to Z

Aviva Rahmani

  • INSTAAR Affiliate
  • Ecological Artist


Aviva Rahmani is an ecological artist who works with scientists to design solutions for degraded environments.

Jorge Ivan Ramírez

  • INSTAAR Affiliate
  • Instructor, University of Colorado Denver


Intersections of urban health, climate change and community capacity building.

Richard Reynolds

  • INSTAAR Affiliate
  • Research Geologist, USGS


Development of dry landscapes and ecosystems through understanding interactions among geologic, ecologic, and climatic processes; geologic, biologic, and human controls on dust generation; Quaternary climate and evolution of landscapes in response to climatic change; environmental magnetism; chemical and magnetic records of pollution in sediments and mineral dust.

Dirk Richter

  • Research Associate


Technology and instrument design & development, Optical engineering and development, Airborne atmospheric research, High-precision trace gas sensing

Karl Rittger

  • Research Associate
  • Executive Committee, International Snow Working Group
  • Member, Snow Albedo Working Group, NASA Hydrology
  • Science Board Advisor, National Center Ecological Analysis
  • Member, American Geophysical Union (AGU)
  • Member, European Geophysical Union (EGU)


Snow hydrology, remote sensing of ice and snow, earth surface energy and water balance, and large-scale data modeling.

Brigitta Rongstad

  • PhD student


Using individual foraminifera analysis to understand the effects of dissolution on the Mg/Ca temperature proxy and to reconstruct ENSO variance in the eastern tropical Pacific.

Garrett Rue

  • PhD 2019
  • PhD Candidate, Environmental Studies
  • Graduate Research Assistant, McMurdo Dry Valleys LTER
  • Teaching Assistant, Dept of Environmental Engineering
  • Graduate Research Assistant, Boulder Creek Critical Zone Observatory
  • Teaching Assistant, Dept of Atmospheric and Oceanographic Sciences
  • Teaching Assistant, Dept of Ecology and Evolutionary Biology
  • Teaching Assistant, Dept of Environmental Studies


field sampling, physical hydrology, aqueous and analytical chemistry, dissolved organic matter isolation/characterization/measurement, chromatography, spectroscopy, spectrophotometry, spectrometry

Joseph Ryan

  • INSTAAR Affiliate
  • Professor of Environmental Engineering, Department of Civil, Environmental, and Architectural Engineering
  • Sustainability Research Network Faculty Director