NASA Goddard Space Flight Center (GSFC), AGU_Fellow, AMS_Fellow

Department of Geographical Sciences, University of Maryland at College Park

Department of Chemistry, University of Montana

Klima- og miljøinstituttet NILU

Emeritus Professor, School of Earth, Atmosphere and Environment, Monash University

Department of Geography, King's College London

Research Physical Scientist, USDA Forest Service

Physical Scientist, NOAA

Environmental Protection Agency

University of Southampton