University of Colorado

State Key Laboratory of Cryospheric Sciences, Chinese Academy of Sciences

Distinguished Professor Emeritus, Univ of Colorado

National Snow and Ice Data Center

Professor of Climate and Space Sciences and Engineering, University of Michigan

University of Geneva

Graz University of Technology; University of St Andrews

Professor of Earth System science, University of California Irvine and NASA's Jet Propulsion

Earth Sciences, University of Ottawa

NOAA Chemical Sciences Laboratory