HE43A:
The Changing Thermohaline Structure of the Arctic Ocean: Mechanisms and Impacts I

Session ID#: 92381

Session Description:
The thermohaline structure of the Arctic Ocean greatly impacts local and global elements of the Earth system. Observations indicate rapid changes in the Arctic heat and freshwater distributions over the past few decades, with increased heat transport from the Atlantic (“Atlantification”), increased freshwater content in the Beaufort Gyre, and reduced stratification. However, the driving mechanisms of these changes and their potential impacts are poorly understood. This session invites contributions that address the controls on the changing Arctic thermohaline structure and stratification, including multi-scale oceanic processes (e.g., general circulations, stirring and mixing, subducting eddies, enhanced small-scale upper ocean variability), surface and lateral fluxes (e.g., surface heat and freshwater fluxes, marginal inflows, transport through major straits), and atmosphere-sea ice-ocean interactions and feedbacks (e.g., climate patterns, increased open water areas, ice-albedo cycle, winds and waves). It also invites contributions that address the potential impacts of these changes on sea ice, acoustic propagation, deep water formation, and biological systems. It aims to bring together perspectives from in situ observations, remote sensing, theory, and numerical models to understand past changes, their impacts, and the implications for predictability.
Co-Sponsor(s):
  • AI - Air-Sea Interactions
  • OM - Ocean Modeling
  • PI - Physical-Biological Interactions
  • PL - Physical Oceanography: Mesoscale and Larger
  • PL - Physical Oceanography: Mesoscale and Larger
  • PS - Physical Oceanography: Mesoscale and Smaller
Index Terms:
Primary Chair:  Jiaxu Zhang, Los Alamos National Laboratory, Los Alamos, NM, United States
Co-chairs:  James M Thomson, Applied Physics Lab (UW), Seattle, WA, United States, Matthew A. Dzieciuch, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States and Verma Tarun, Los Alamos National Laboratory, Los Alamos, United States
Primary Liaison:  Jiaxu Zhang, Los Alamos National Laboratory, Los Alamos, NM, United States
Moderators:  Jiaxu Zhang, Los Alamos National Laboratory, Los Alamos, NM, United States, James M Thomson, Applied Physics Lab (UW), Seattle, WA, United States, Matthew A. Dzieciuch, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States and Verma Tarun, Los Alamos National Laboratory, Los Alamos, United States
Student Paper Review Liaisons:  Jiaxu Zhang, Los Alamos National Laboratory, Los Alamos, NM, United States and James M Thomson, Applied Physics Lab (UW), Seattle, WA, United States

Abstracts Submitted to this Session:

Stratified Ocean Dynamics of the Arctic Ocean (SODA) (641243)
Craig Lee, Applied Physics Laboratory, University of Washington, Seattle, WA, United States
Turbulence and Mixing Statistics and Dynamics in the Southeastern Beaufort Sea (649906)
Stephanie Waterman1, Jeff R Carpenter2, Benjamin Scheifele1 and Lucas Merckelbach2, (1)University of British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (2)Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Geesthacht, Germany
Observations of the heat budget at the ocean-ice interface during an anomalous Arctic winter (657194)
Carson Witte1, Christopher J Zappa1, Nathan Laxague1, Andrew R Mahoney2, Sarah Renee Betcher3, Donna Hauser4, Ajit Subramaniam1, Alex Whiting5, John Goodwin6, Cyrus Harris7, Bobby Schaeffer7 and Ross Schaeffer7, (1)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (2)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (3)Farthest North Films, Juneau, AK, United States, (4)International Arctic Research Center, Fairbanks, AK, United States, (5)Native Village of Kotzebue, Kotzebue, AK, United States, (6)Community of Kotzebue, Kotzbue, AK, United States, (7)Community of Kotzebue, Kotzebue, AK, United States
Subduction of Pacific Summer Water into sub-surface eddies; coordinated observations from late summer 2018 (656459)
Jennifer A MacKinnon1, Harper L Simmons2, John T. Hargrove3, Jim Thomson4, Thomas Peacock5, Matthew H Alford6, Marion S Alberty1, Benjamin Iolo Barton7, Samuel Brenner8, Nicole Couto9, Seth L Danielson10, Elizabeth Fine1, Hans Christian Graber3, John Guthrie11, Joanne Hopkins12, Steven R Jayne13, Thilo Klenz14, Craig Lee6, Yueng Djern Lenn15, Andrew J. Lucas16, Madison Smith17, Sinhue Torres-Valdes18, Kevin R Wood19 and John Woods20, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)University of Alaska Fairbanks, Fairbanks, AK, United States, (3)University of Miami, Center for Southeastern Tropical Advanced Remote Sensing, Miami, FL, United States, (4)University of Washington, Seattle, WA, United States, (5)Dept of Mech Eng - RM 1-310, Cambridge, MA, United States, (6)Univ Washington, Seattle, WA, United States, (7)University of Western Brittany, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Plouzané, France, (8)University of Washington Seattle Campus, Oceanography, Seattle, WA, United States, (9)Scripps Institution of Oceanography, La Jolla, United States, (10)Univ Alaska, Fairbanks, AK, United States, (11)Polar Science Center, APL-UW, Seattle, WA, United States, (12)National Oceanography Centre, Liverpool, United Kingdom, (13)WHOI, Department of Physical Oceanography, Woods Hole, MA, United States, (14)University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States, (15)Bangor University, Wales, School of Ocean Sciences, Menai Bridge, United Kingdom, (16)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (17)Applied Physics Laboratory University of Washington, Seattle, WA, United States, (18)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (19)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (20)U.S. National Ice Center, Washington D.C., DC, United States
Evolution of a Warm Water Intrusion in the Beaufort Sea from Remote Sensing and Subsurface Observations (651656)
John T. Hargrove1, Jenn McKinnon2, Harper L Simmons3, Matthew Alford4, Nicole Couto5, Bjoern Lund6 and Hans Christian Graber1, (1)University of Miami, Center for Southeastern Tropical Advanced Remote Sensing, Miami, FL, United States, (2)Scripps Institute of Oceanography, United States, (3)University of Alaska Fairbanks, Fairbanks, AK, United States, (4)Scripps Institution of Oceanography, La Jolla, CA, United States, (5)Scripps Institution of Oceanography, La Jolla, United States, (6)University of Miami, Rosenstiel School of Marine and Atmospheric Sciences, Miami, FL, United States
Understanding the variability of the Barents Sea Water: a high resolution model study (652391)
Benjamin Iolo Barton, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Plouzané, France; National Oceanography Center, Liverpool, United Kingdom, Camille Lique, IFREMER, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Plouzané, France, Claude Talandier, CNRS, Laboratoire d'océanographie physique et spatiale, Plouzane, France and Yueng Djern Lenn, Bangor University, Wales, School of Ocean Sciences, Menai Bridge, United Kingdom
Missing freshwater found below the mixed layer during the melt season in the Canada Basin of the CESM Climate Model (648911)
Erica Jamie Rosenblum1,2, Robert Andrew Fajber3, Bruno Tremblay4, Julienne Stroeve5, Sarah T Gille6, Ryan J Galley1 and Eddy Carmack7, (1)University of Manitoba, Winnipeg, MB, Canada, (2)McGill University, Montreal, Canada, (3)University of Toronto, Physics, Toronto, ON, Canada, (4)McGill University, Montreal, QC, Canada, (5)University College London, CPOM, London, United Kingdom, (6)UCSD, La Jolla, CA, United States, (7)Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada
Persistent freshening of the Arctic ocean caused by summer-enhanced sea ice decline (642153)
Hui Li, National Center for Atmospheric Research, Boulder, CO, United States and Alexey V Fedorov, Yale University, New Haven, United States