BN21A:
Evolution of Biogeochemical Cycles in the Arctic Ocean: Predicting the Impact from and on Climate Change I


Session ID#: 37357

Session Description:
The Arctic Ocean shelves, particularly those in the Bering, Chukchi and Beaufort seas, are highly productive ecosystems that host large populations of marine mammals, seabirds and fish. Climate change is dramatically altering primary productivity and water column biogeochemistry as ongoing loss of shore-fast ice and longer ice-free seasons increase light availability, promoting phytoplankton growth. Unknown are impacts from changes in the supply and recycling of essential macro (e.g. N, P. Si) or micro (trace elements, e.g., Co, Fe, Zn) nutrients, which are likely critical for sustaining high productivity in this region. Modifications in carbon cycling and primary productivity may also influence emissions of climatically important traces gases (CO2, CH4, N2O). This session invites contributions investigating biogeochemical cycling of major nutrients and traces elements as well and emissions of greenhouse gases and their impacts on primary productivity and climate in the Arctic Ocean. Presentations based on either field experiments (using for example natural or tracer-level isotopes and molecular microbial ecology techniques), laboratory approaches, or model simulations are welcome.
Primary Chair:  Annie Bourbonnais, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; University of Massachusetts Dartmouth, New Bedford, MA, United States
Co-chairs:  Mark A Altabet, University of Massachusetts Dartmouth, New Bedford, MA, United States, Julie Granger, University of Connecticut, Department of Marine Sciences, Groton, CT, United States and Cara C Manning, University of British Columbia, Vancouver, BC, Canada
Moderators:  Annie Bourbonnais, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Julie Granger, University of Connecticut, Department of Marine Sciences, Groton, CT, United States, Mark A Altabet, University of Massachusetts Dartmouth, New Bedford, MA, United States and Cara C Manning, University of British Columbia, Vancouver, BC, Canada
Student Paper Review Liaisons:  Annie Bourbonnais, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Cara C Manning, University of British Columbia, Vancouver, BC, Canada
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]
4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • AI - Air-Sea Interactions
  • CT - Chemical Tracers, Organic Matter and Trace Elements
  • HE - High Latitude Environments
  • PC - Past, Present and Future Climate

Abstracts Submitted to this Session:

Influence of mixing dynamics on net community production and CO2 uptake in Canadian Arctic and Subarctic ocean waters (316689)
Philippe Daniel Tortell1, Robert William Izett2, Melanie Chanona2, Jacquie-Lee Thibault3 and Paul Glen Myers4, (1)University of British Columbia, Earth, Ocean and Atmospheric Science, Vancouver, BC, Canada, (2)University of British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (3)University of British Columbia, BC, Canada, (4)University of Alberta, Edmonton, AB, Canada
Spatiotemporal Variability of Nitrogen Deficits on the Eastern Bering Sea Shelf (313786)
Calvin Mordy1, Lisa B Eisner2, Albert J Hermann3, David Kimmel4, Carol A Ladd3, Michael W Lomas5, Kathryn L. Mier2,4, Peter Proctor6, Phyllis J Stabeno3,7 and Eric Wisegarver3, (1)University of Washington, Joint Institute for the Study of the Atmosphere and Ocean, Seattle, WA, United States, (2)NOAA - Alaska Fisheries Science Center, Seattle, WA, United States, (3)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (4)NOAA, Alaska Fisheries Science Center, Seattle, WA, United States, (5)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, (6)University of Washington Seattle Campus, Joint Institute for the Study of Atmosphere and Ocean, Seattle, WA, United States, (7)NOAA Pacific Marine Environmental Lab, Seattle, WA, United States
Biogeochemical and physical controls on interannual and spatial variability in CH4 and N2O distributions across the North American Arctic Ocean (305197)
Cara C Manning1, Zhiyin Zheng2, David W Capelle3, Lindsay Fenwick1, Ellem Damm4 and Philippe D. Tortell1, (1)University of British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (2)University of British Columbia, Vancouver, BC, Canada, (3)University of Manitoba, Centre for Earth Observation Science, Winnipeg, MB, Canada, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
N Cycling in the Eastern Canadian Arctic: Constraints from Dual Isotope Measurements in Nitrate and Nitrous Oxide (317505)
Nadine Lehmann1, Markus Kienast1, Julie Granger2, Annie Bourbonnais3,4, Mark A Altabet3 and Jean-Eric Tremblay5, (1)Dalhousie University, Department of Oceanography, Halifax, NS, Canada, (2)University of Connecticut, Department of Marine Sciences, Groton, CT, United States, (3)University of Massachusetts Dartmouth, New Bedford, MA, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (5)Laval University, Biologie, Quebec City, QC, Canada

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