Arctic-North Atlantic Connectivity: Variability, Changes, and Impacts of Freshwater and Heat Exchange I

Session ID#: 92297

Session Description:
A two-way connectivity between the polar and subpolar basins realizing through salt and heat exchange between the Arctic Ocean and the subpolar North Atlantic is generally accepted. It is not fully understood yet at what time scales and to what extent the Arctic Ocean impacts the subpolar North Atlantic and how changes in the North Atlantic feedback to the Arctic Ocean. This problem is particularly important considering current rapid changes in the Arctic Ocean. Observations indicate a shift in the oceanic freshwater and heat content in the Arctic Ocean likely resulting in changes in oceanic fluxes to the subpolar seas. At the same time, recently observed changes in the subpolar seas, that are not obviously related to the Arctic export variations, may impact the heat input into the Arctic. Increasing Greenland runoff complicates the matter adding surplus freshwater into the subpolar North Atlantic. The goal of this session is to analyze present and future changes in the subpolar North Atlantic and their linkage to the Arctic Ocean fluxes as well as potential impact of the subpolar region on the Arctic Ocean via oceanic variability. This session solicits papers discussing observations and simulations of salt and heat transports between the Arctic Ocean and the North Atlantic; impacts of polar-subpolar fluxes on ocean circulation, convective mixing and water mass formation; biogeochemical impacts and marine ecosystem response to changing Arctic-North Atlantic fluxes; and identification and tracking of polar water, Greenland meltwater, and Atlantic water propagating in the polar and subpolar seas.
  • IS - Ocean Observatories, Instrumentation and Sensing Technologies
  • OM - Ocean Modeling
  • PC - Past, Present and Future Climate
Index Terms:

1635 Oceans [GLOBAL CHANGE]
4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4534 Hydrodynamic modeling [OCEANOGRAPHY: PHYSICAL]
4536 Hydrography and tracers [OCEANOGRAPHY: PHYSICAL]
Primary Chair:  Dmitry S Dukhovskoy, Florida State University, Tallahassee, FL, United States
Co-chairs:  Igor Yashayaev, Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada, Laura de Steur, Norwegian Polar Institute, Tromsø, Norway and Kristina A Brown, Institute of Ocean Sciences, Sidney, Canada
Primary Liaison:  Dmitry S Dukhovskoy, Florida State University, Tallahassee, FL, United States
Moderators:  Dmitry S Dukhovskoy, Florida State University, Tallahassee, FL, United States and Laura de Steur, Royal Netherlands Institute for Sea Research, Physical Oceanography, Den Burg, Netherlands
Student Paper Review Liaison:  Dmitry S Dukhovskoy, Florida State University, Tallahassee, FL, United States

Abstracts Submitted to this Session:

A Conceptual Model of Polar Overturning Circulation (644267)
Thomas W N Haine, Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, MD, United States
Arctic Ocean Circulation and Nordic Seas Hydrography: Oceanic and Atmospheric Connections (644572)
Jessica Sarah Kenigson, Yale University, New Haven, CT, United States and Mary-Louise Timmermans, Yale University, Department of Earth & Planetary Sciences, New Haven, United States
How Atlantic heat makes Arctic sea ice retreat (646128)
Tor Eldevik1, Ingrid Husøy Onarheim1, Lars Henrik Smedsrud1, Michael Steele2, Paul Anthony Dodd3, Morven Muilwijk1 and Marius Årthun4, (1)Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway, (2)Univ Washington, Seattle, United States, (3)Norwegian Polar Institute, Tromsø, Norway, (4)Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway
Impact of the Beaufort Gyre freshwater release on deepwater formation in the North Atlantic (656421)
Jiaxu Zhang, University of Washington, CICOES, Seattle, United States, Wilbert Weijer, Los Alamos National Laboratory, Los Alamos, NM, United States, Wei Cheng, Univ of Washington, Seattle, United States, Michael Steele, Univ Washington, Seattle, United States and Tarun Verma, Texas A & M University, College Station, TX, United States
Influence of the Norwegian Sea Gyre on the heat transports to the Arctic (650493)
Hjálmar Hátún1, Leon Chafik2 and Bogi Hansen1, (1)Faroe Marine Research Institute, Tórshavn, Faroe Islands, (2)Stockholm University, Department of Meteorology, Stockholm, Sweden
Role of 'Sea Ice Conveyor' in Arctic Liquid Freshwater Changes (648185)
Sam Cornish, University of Oxford, Earth Sciences, Oxford, United Kingdom, David Philip Marshall, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom and Yavor Kostov, University of Exeter, Exeter, United Kingdom
Springtime Export of Arctic Sea Ice Shapes the Phytoplankton Production in the Greenland Sea (639629)
Nicolas Mayot1, Patricia Matrai1, Adelaida Arjona1, Simon Belanger2, Christian Marchese2, Thomas Jaegler3, Mathieu Ardyna4 and Michael Steele5, (1)Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States, (2)University of Quebec at Rimouski UQAR, Rimouski, QC, Canada, (3)Arctus, Rimouski, QC, Canada, (4)Stanford University, Stanford, CA, United States, (5)Applied Physics Laboratory University of Washington, Polar Science Center, Seattle, WA, United States
Time series of freshwater, heat, and volume fluxes through Barrow Strait in the Canadian Arctic Archipelago (657152)
Clark Richards, Bedford Institute of Oceanography, Dartmouth, NS, Canada, Shannon Hope Nudds, Department of Fisheries and Oceans Canada, Dartmouth, NS, Canada and Donglai Gong, Virginia Institute of Marine Science, Gloucester Point, VA, United States