HE51A:
Dynamics on the Edge: Ice-Ocean, Fjord, Continental Shelf, and Slope Processes for the Arctic and Subpolar Oceans I


Session ID#: 11358

Session Description:
It is now beyond dispute that the Arctic is experiencing rapid climate change. There remain many open questions about the future of the Arctic and how changes occurring here will impact the lower latitudes. In the Arctic and subpolar Arctic, freshwater inputs from rivers and glaciers are dispersed across the shelves where vigorous mixing from winter convection, winds and tidal dissipation transform water masses. The mechanisms controlling export from the shelves and other cross-slope exchange processes including eddy fluxes and Arctic Ocean lateral intrusions carrying Atlantic heat, salt and biogeochemical tracers into the central Arctic basins are likely to be sensitive to changing ice and freshwater conditions but remain unresolved. Boundary current dynamics interacting with separate first-order shelf-slope exchange processes set the stratification in the Arctic and the sub-polar Arctic seas i.e. Greenland, Irminger, Norwegian, Labrador and Bering, and are likely to ultimately impact deep convection and meridional overturning.  We invite physical and biogeochemial contributions from colleagues focusing on shelf and slope processes, especially shelf-slope exchange, boundary current dynamics, freshwater dispersion and communication between the high Arctic and subpolar Arctic seas.
Primary Chair:  Yueng Djern Lenn, Bangor University, Wales, School of Ocean Sciences, Menai Bridge, United Kingdom
Chairs:  Beth Curry, University of Washington Seattle Campus, Seattle, WA, United States, Markus A Janout, AWI, Bremerhaven, Germany, Helen Johnson, University of Oxford, Oxford, United Kingdom, David Sutherland, University of Oregon, Eugene, OR, United States, Fiammetta Straneo, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Patrick Heimbach, University of Texas at Austin, Austin, TX, United States and Carlos F Moffat, University of Delaware, Newark, DE, United States
Moderators:  Beth Curry, University of Washington Seattle Campus, Seattle, WA, United States and Yueng Djern Lenn, Bangor University, School of Ocean Sciences, Menai Bridge, United Kingdom
Student Paper Review Liaison:  Beth Curry, University of Washington Seattle Campus, Seattle, WA, United States
Index Terms:

1635 Oceans [GLOBAL CHANGE]
4562 Topographic/bathymetric interactions [OCEANOGRAPHY: PHYSICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
9315 Arctic region [GEOGRAPHIC LOCATION]
Co-Sponsor(s):
  • A - Air-sea Interactions and Upper Ocean Processes
  • B - Biogeochemistry and Nutrients
  • PO - Physical Oceanography/Ocean Circulation
  • TP - Turbulent Processes

Abstracts Submitted to this Session:

Circulation and Transformation of Winter Water in the Chukchi Sea (87164)
Robert S Pickart1, Kent Moore2, Chongyuan Mao3 and Frank Bahr1, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)University of Toronto, Toronto, ON, Canada, (3)National Oceanography Centre, Southampton, United Kingdom
Quantifying Inflows and Outflows to/from Barrow Canyon using Shipboard and Glider Data (91999)
Donglai Gong, Virginia Institute of Marine Science - William & Mary, Gloucester Point, VA, United States and Robert S Pickart, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
The Circulation Structure Around Hanna Shoal on the Northeastern Chukchi Sea Shelf (88033)
Ying-Chih Fang1, Thomas Weingartner2, Rachel A Potter3, Chase Stoudt4 and Elizabeth L Dobbins4, (1)University of Alaska School of Fisheries & Ocean Science, Fairbanks, AK, United States, (2)University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States, (3)Univ of AK-Fairbanks, Fairbanks, AK, United States, (4)University of Alaska Fairbanks, Fairbanks, AK, United States
Transport and Degradation of Dissolved Organic Matter and Associated Freshwater Pathways in the Laptev Sea (Siberian Arctic) (87463)
Jens A Hoelemann1, Markus A Janout1, Boris Koch1, Dorothea Bauch2, Andrey Novikhin3, Birgit Heim4, Antje Eulenburg4, Heidemarie Kassens2 and Leonid Timokhov3, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)Arctic and Antarctic Research Institute, St.Petersburg, Russia, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany
Shelf –Basin exchange along the Laptev – East Siberian Seas (90787)
Leif G Anderson1, Sara Jutterstrom2, Tim Stoeven3, Göran M Björk4, Ola Holby5, Martin Jakobsson6, Igor Peter Semiletov7, Toste S Tanhua8 and Adam Ulfsbo4, (1)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, (2)IVL Swedish Environmental Research Institute, Gothenburg, Sweden, (3)Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)University of Gothenburg, Gothenburg, Sweden, (5)Karlstad University, Department of Environmental and Energy Systems, Karlstad, Sweden, (6)Stockholm University, Department of Geological Sciences, Stockholm, Sweden, (7)University of Alaska Fairbanks, Fairbanks, AK, United States, (8)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
The Atlantic Water boundary current north of Svalbard (87258)
M. Dolores Pérez-Hernández1, Robert S Pickart1, Vladimir Pavlov2, Randi Ingvaldsen3 and Arild Sundfjord4, (1)Woods Hole Oceanographic Institution, Physical Oceanography, Woods Hole, MA, United States, (2)Norwegian Polar Institute, The Polar Environmental Centre, Tromso, Norway, (3)Institute of Marine Research, Oceanography and Climate, Bergen, Norway, (4)Norwegian Polar Institute, Tromso, Norway
Current surges and sediment erosion near the shelf edge in the Canadian Beaufort Sea: the role of wind and ice motion stress  (93520)
Alexandre Forest, Golder Associates Ltd., Quebec City, QC, Canada, Philip D. Osborne, Golder Associates Ltd., Vancouver, BC, Canada, Gregory Curtiss, Golder Associates Inc., Redmond, WA, United States and Malcolm G. Lowings, NorQuest Systems, Lethbridge, AB, Canada