Paleoclimate and Sedimentology Research Group


The Climate Geology Research Group focuses on deciphering paleoclimates and paleoenvironments on different time scales ranging from the past centuries to the Neogene using sclerochronological, geochemical, and micropaleontological multi-proxy approaches. Our highly interdisciplinary research is conducted in close collaboration with biologists, oceanographers, climate physicists and archaeologists.

Research Themes


Geology publication: Hetzinger, S.,Halfar, J.,Zajacz, Z., Wisshak, M. (2019) Early start of 20th century Arctic sea ice decline recorded in Svalbard coralline algae, Geology, 47 (10): 963-967, 10.1130/G46507.1

Nature Communications publication: Chan, P., Halfar, J., Adey, W., Hetzinger, S., Zack, T., G.W.K. Moore, U.G. Wortmann, B. Williams, A. Hou (2017) Multicentennial record of North Atlantic primary productivity and sea-ice variability archived in coralline algal Ba/Ca, Nature Communications, 10.1038/NCOMMS15543

Science Educational Program on Arctic Research with Christian Haas and Jochen Halfar (in German) can be viewed at


53 minute Documentary (ARTE TV) on Coralline Algal Arctic Expedition

English, French and German version available upon request

Study on Algal Sea-Ice Proxy in PNAS

Read Abstract - Read Press Release

- Read Highlight in Nature - Watch TV News

Watch Global News Coverage

Watch movie by Karen Loveland and Walter Adey on our research in Labrador:

Principle Investigator

UTM Jochen Halfar

Jochen Halfar, PhD.

Professor of Geology
Dept. of Chemical & Physical Sciences,
University of Toronto at Mississauga
South Building, Room 4044
Mississauga, ON L5L 1C6

Phone: (905) 828-5419
Fax: (905) 569-4929
E-Mail: jochen.halfar at

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