Aagaard, K. . Univ. of Washington, aagaard@apl.washington.edu
Carmack, E. C. Institute of Ocean Sciences, CarmackE@dfo-mpo.gc.ca

 
A CHANGING ARCTIC OCEAN AND CONSEQUENCES FOR BIOLOGICAL PRODUCTION
 
The past decade has seen remarkable changes within the Arctic Ocean, including a warming of the Atlantic layer, a diminished influence of Pacific waters, a widespread decrease in the upper ocean stratification and shallowing of the halocline, and a reduction in ice extent. There have been correspondingly large changes in atmospheric forcing. Some of these changes appear to be unique within this century, and together they suggest that an Arctic Ocean substantially different from that of the immediate past is not unthinkable. We consider it likely that such an altered Arctic Ocean would exhibit a more vigorous vertical circulation, increased nutrient fluxes, and an extended growing season. This would have significant consequences not only for the overall level of biological production, but also for its geographical distribution and timing. For example, we would expect a shift away from the present throughflow-dominated production in the Bering-Chukchi and Barents seas to one of increased production on the other vast arctic shelves and within the Canadian Arctic Archipelago. It behooves us to address these issues in a timely manner.
 
Day: Tuesday, Feb. 2
Time: 02:00 - 02:30pm
Location: Eldorado Hotel
 
Code: SS15TU0200E