OS53D:
Beyond Constant Eddy Diffusivities: Estimation, Implementation, Impacts, and New Approaches to the Parameterization of Lateral Mixing in Ocean Models Posters


Submit an Abstract to this Session


Session ID#: 45421

Session Description:
In ocean climate models, the lateral transport of tracers due to unresolved turbulent flows must be parameterized. The most common approach mimics molecular diffusion or anisotropic diffusion, to represent stirring along isopycnals (Redi coefficient), and represents unresolved eddy-induced advection by slumping isopycnals at a rate proportional to their slopes (Gent-McWilliams coefficient). Constraining the values of these parameters has been a goal of the modeling and observational communities for decades. This session addresses (1) advances in estimation of mixing and tracer variance production by eddies from observations and high resolution models, (2) theoretical approaches to constrain the parameters, including inverse methods, (3) implementation in ocean models, (4) impacts of parameterizations on modeled tracers and/or climate variability, and (5) novel approaches. The focus of the session is on methods and quantities relevant to model parameterizations specifically, as opposed to diagnosis of turbulent structures for other reasons.
Primary Convener:  Inga Monika Koszalka, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Conveners:  K. Shafer Smith, New York University, CAOS, Courant Institute of Mathematical Sciences, New York, United States, Baylor Fox-Kemper, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Anand Gnanadesikan, Johns Hopkins University, Earth & Planetary Sciences, Baltimore, MD, United States
Primary Liaison:  Anand Gnanadesikan, Johns Hopkins University, Earth and Planetary Sciences, Baltimore, MD, United States
Chairs:  Baylor Fox-Kemper, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States and K. Shafer Smith, New York University, CAOS, Courant Institute of Mathematical Sciences, New York, United States
OSPA Liaison:  Anand Gnanadesikan, Johns Hopkins University, Earth & Planetary Sciences, Baltimore, MD, United States
Index Terms:

4255 Numerical modeling [OCEANOGRAPHY: GENERAL]
4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4568 Turbulence, diffusion, and mixing processes [OCEANOGRAPHY: PHYSICAL]

Abstracts Submitted to this Session:

Toward a parameterization of eddy mixing across continental slopes (365631)
Yan Wang, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong and Andrew Stewart, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States
Title: The Impact of Southern Ocean Eddies on the Ventilation Tracer in Changing Climate (426203)
Asher Riaz, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
Can Lagrangian tracking simulate tracer spreading in a high-resolution Ocean General Circulation Model? (372648)
Patrick Wagner, Siren Ruehs, Franziska U Schwarzkopf, Inga Monika Koszalka and Arne Biastoch, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Eddy Diffusivity Estimates from Lagrangian Trajectories Simulated with Ocean Models and Surface Drifter Data — A Case Study for the Greater Agulhas System (405690)
Siren Ruehs1, Victor Zhurbas2, Inga Monika Koszalka1, Jonathan Durgadoo1 and Arne Biastoch1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)Shirshov Institute of Oceanology, Moscow, Russia
Clustering of floating particles due to submesoscale dynamics: a simulation study for the Gulf of Finland, Baltic Sea (430735)
Germo Väli1, Victor Zhurbas2, Urmas Lips1 and Jaan Laanemets1, (1)Tallinn University of Technology, Department of Marine Systems, Tallinn, Estonia, (2)Shirshov Institute of Oceanology, Moscow, Russia
Statistical parameterization of surface lateral diffusivity from satellite data (377339)
Aleksi Nummelin, Johns Hopkins University, Department of Earth & Planetary Sciences, Baltimore, MD, United States and Thomas W N Haine, Johns Hopkins University, Department of Earth and Planetary Sciences, Baltimore, MD, United States
Dynamically-connected tracer and buoyancy mixing coefficients in eddy parameterization schemes (423451)
K. Shafer Smith, New York University, Courant Institute of Mathematical Sciences, New York, NY, United States and Dhruv Balwada, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Estimates of surface horizontal diffusivity based on submesoscale observations of surface currents and passive tracer (376881)
Sung Yong Kim, Korea Advanced Institute of Sciecne and Technology, Department of Mechanical Engineering, Daejeon, South Korea, Eun Ae Lee, Korea Advanced Institute of Science and Technology, Daejeon, South Korea and Hyoungsoo Kim, Korea Advanced Institute of Science and Technology, Deajeon, South Korea
Evolution of small-scale horizontal variability over the continental shelf (449475)
Samantha Kenah, Skidmore College, Physics, Saratoga Springs, NY, United States and Anthony Kirincich, Woods Hole Oceanographic Inst, Woods Hole, MA, United States
Freshwater Lenses in the Near-Surface Layer of the Ocean Laterally Spreading as Gravity Currents (455748)
Cayla Dean, NOAA/NOS/CO-OPS, Tuscaloosa, AL, United States and Alexander Soloviev, Nova Southeastern Univ, Dania Beach, United States
Is the Eddy-driven Velocity Different for Different Tracers? (391971)
Jin-Song von Storch and Eileen Hertwig, Max Planck Institute for Meteorology, Hamburg, Germany
Modeling the Effects of Mesoscale Eddies on Large-scale Circulation, Mixing and Tracer Distributions in a Global Ocean Circulation Model (419022)
Nadia Frances Cohen, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States and Andreas Schmittner, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
To mix, or not to mix, that is the question: analysis of heat and carbon uptake across different resolutions in GFDL’s OMIP and OMIP-BGC simulations (433189)
John P Krasting, NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, United States, Alistair Adcroft, Program for Atmospheric and Oceanic Sciences, Princeton University, Princeton, United States, John P Dunne, NOAA Geophys Fluid Dynamic, Princeton, United States, Stephen Matthew Griffies, LOCEAN Laboratory, Sorbonne Université/CNRS/IRD/MNHN, Paris, France, Jasmin G John, NOAA/GFDL, Princeton, United States and Michael Winton, NOAA Geophys Fluid Dynamic, Princeton, NJ, United States
Non-local mixing (461192)
Tyler Lutz, Yale University, New Haven, CT, United States, Andre Souza, MIT, Boston, United States, Charles Doering, University of Michigan, Ann Arbor, United States, Glenn Flierl, MIT, Cambridge, MA, United States and Gregory LeClaire Wagner, MIT, Cambridge, United States
Multiple Dynamic Zones in Mesoscale Oceanic Eddies (463573)
Changming Dong, Nanjing University of Information Science and Technology, Nanjing, China
Observed enhancement of turbulent mixing in the cyclonic eddy (350661)
Yongchui Zhang, National University of Defense Technology, Institute of Meteorology and Oceanography, Nanjing, China, Xi Chen, Brown University, Earth, Environmental and Planetary Sciences, Providence, RI, United States, Changming Dong, University of California, Department of Atmospheric and Oceanic Sciences, Los Angeles, United States and Gang Wei, National University of Defense Technology, Nanjing, China
Parameterization of Wave-induced Mixing Using Large Eddy Simulations (LES) (426080)
Haili Wang, Nanjing University of Information Science and Technology, Nanjing, China, Changming Dong, University of California, Department of Atmospheric and Oceanic Sciences, Los Angeles, United States, Xiaoqian Gao, Nanjing University of Science & Technology, Baton Rouge, LA, United States and Baylor Fox-Kemper, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States

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