Cryo-reactions and Arctic Marine Cryospheric Chemistry

a presentation by Dr. Feiyue (Fei) Wang, Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada

2017.12.19 | Peter Schmidt Mikkelsen

Date Thu 01 Feb
Time 14:00 15:00
Location ARC, Ny Munkegade 114, Building 1540, meeting room 1540-020

Cryo-reactions and Arctic Marine Cryospheric Chemistry

Most chemical reactions in aqueous solution slow down as temperature decreases. In frozen media, however, certain reactions are known to proceed very differently from their aqueous counterparts, some being accelerated in rate while others yielding unexpected products. Although the mechanisms of most of these "cryo-reactions" remain poorly known, their importance in many stratospheric and tropospheric processes has been long recognised. Evidence is mounting that the Arctic marine cryosphere (i.e., the dynamic sea ice environment that includes sea ice, the overlying snow and their adjacent boundary layers in the troposphere and in the ocean) is also much more chemically and biogeochemically active than previously thought. In this talk, I will provide a synopsis of the current understanding of major types of cryo-reactions and their implications for the cycling of CO2, mercury, and oil-related contaminants in the Arctic marine cryosphere in a changing climate. I will also introduce two major Canadian research initiatives that will greatly facilitate such studies: the Churchill Marine Observatory (CMO) and the Oil-Spills-in-Ice-Covered-Arctic-waters (OSICA) Research Network.


Bio: Dr. Fei Wang is Professor of Environmental Chemistry and Biogeochemistry at the University of Manitoba, Winnipeg, Canada. He holds a Canada Research Chair (Tier 1) in Arctic Environmental Chemistry. Dr. Wang's research interests are in molecular-level processes governing the transport and transformation of chemical contaminants across environmental and bio-interfaces, and in global-scale interplay between chemical contamination and climate change. His most recent research has focussed on mercury biogeochemistry in the Arctic marine ecosystems, and on environmental chemistry of the rapidly changing Arctic sea ice environment. He has authored and co-authored more than 120 scientific papers in peer-reviewed journals and books. Dr. Wang directs the Ultra-Clean Trace Elements Laboratory (UCTEL) for the study of mercury and trace elements in the environment. He is Chief Scientist of the Sea-ice Environmental Research Facility (SERF), the first experimental sea ice facility in Canada, and the Oil-in-Sea-Ice Mesocosm (OSIM) of the soon-to-be-operational Churchill Marine Observatory (CMO). Dr. Wang is Past Chair of the Environment Division of the Chemical Institute of Canada. He is also a member of the United Nations Environment’s Project Coordination Group for the Global Mercury Assessment.

Arctic Research Centre