Total Mercury in the Cryosphere in the Western Arctic Ocean
Ship: CCGS Amundsen CA
Principal Investigator: Feiyue Wang
Start Date: 25-12-2007
End Date: 05-07-2008
Citation: Chaulk, A., Stern, G.A., Armstrong, D., Barber, D.G., Wang, F. Mercury distribution and transport across the ocean-sea-ice-atmosphere interface in the Arctic Ocean. Env. Sci. Technol. 2011, 45, 1866-1872.
Abstract: Samples were collected over the course of the CFL excursion from Leg 5 until the complete melt during Leg 9. Surface snow samples were collected twice daily in cleaned 50mL Falcon tubes. Ice cores were collected at each station, partitioned according to microstructure, scraped clean and melted. Temperature profiles of the ice, as well as salinity and conductivity profiles, were also done. Brine drainage was sampled by drilling a series of holes (20, 40, 60, 80, 100cm) into the ice, allowing the brine to seep in, then collecting the brine twice daily for 3 days using a cleaned and tested turkey baster into 50mL falcon tubes. Salinity and conductivity of brine were also measured. Blanks were taken during every sampling. Samples were collected with the objective of elucidating the cryosphere's role in mercury (Hg) dynamics and cycling in the Arctic system as well as the role processes in the cryosphere influencing mercury entering the marine food web. The flux of mercury from the cryosphere to the aquatic system will be estimated.