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Upcoming Events
Growth of chum salmon in relation to population abundance and climate in the eastern North Pacific Ocean and the recruitment of pollock in the eastern Bering Sea Ellen Martinson
Ecology and energetics of early life stages of walleye pollock in the eastern Bering Sea: the role of spatial variability across climatic conditions. Elizabeth Calvert Siddon
Shelf Input of Trace Metals to the Canada Basin
Wednesday, 11 April, 3:30 pmDr. Ana Aguilar-Islas, Assistant Professor
SFOS
Fairbanks—201 O'Neill • Seward—101 Rae Building • Juneau—101 Lena Point • Kodiak—225 KSMSC Owen
The distribution of trace metals in the Arctic Ocean has implications for their global cycles, yet until recently very limited trace metal data was available from this rapidly changing ocean. International Polar Year (IPY) cruises have provided the first high resolution profiles from the Eurasian basins (Nansen, Amundsen and Makarov in 2007) and from the Canada Basin (in 2009). Additionally, two JAMSTEC cruises (2008 and 2010) in the western Arctic Ocean have provided trace metal data from a region in between the waters surveyed during the IPY cruises. Here we present dissolved and particulate trace metal data from samples collected onboard the R/V Mirai during the 2010 JAMSTEC Arctic cruise. Results will be presented in context with newly published Arctic trace metal data. Shelf inputs were apparent at mid depths in the dissolved and the suspended particulate data. Suspended particles offshore had an Fe/Al ratio of 0.56 (r2 = 0.98), a value within the range of previously measured Arctic shelf sediments. This transported sediment contained a high percentage of leachable metals which could potentially contribute to the dissolved metal pools of the basin.
