Atlantic Arctic ocean-ice-atmosphere system; Arctic sea ice; late Holocene climate and environmental change; Greenland and the Nordic Seas; contemporary changes and Arctic sustainability.
PhD: University of Colorado Boulder, 1993
MA: San Diego State University, 1989
BA: University of California Berkeley, 1983
Research interests include Arctic sea ice and its role in the climate system; polar climate change and its impact on boreal marine and terrestrial environments; decadal studies using satellite remote-sensing data; century- and millennial-scale studies using historical and paleoceanography proxy records; quantitative data synthesis using time-series analysis; and contemporary changes in Arctic environments and sustainability, including cruise tourism.