PS34A:
Transport and Coherent Structures: New and Traditional Approaches for Studying Ocean Stirring and Mixing I Posters


Session ID#: 27979

Session Description:
Ocean flows are dominated by coherent structures, like eddies, with lifetimes longer than typical dynamical timescales. Due to their capacity to transport water and material over long distances, these features play an important role in climate, biogeochemistry, and small-scale mixing. Recently, there has been an influx of powerful techniques from the mathematical literature for identifying coherent structures in ocean flows. These include ideas focussed on Lagrangian flow maps, dynamical systems theory, and set-theoretic approaches involving transfer operators and clustering. There remain many questions about how these novel ideas are related to traditional metrics of ocean mixing. For example, how can coherent structures improve eddy parameterizations in ocean models? How do sparse sampling, noise, and smoothing impact the identification of coherent structures, which frequently requires the full flow? How can we exploit novel observational approaches such as autonomous robots, clustered drifter releases, or remote sensing? We invite contributions on transport and coherent structures, including new Eulerian and Lagrangian approaches, numerical modeling studies, observational error assessments, and applications to problems in ocean physics and biogeochemistry. Our hope is to engage a broad swath of the community to help bring these methods to bear on important contemporary problems in oceanography.
Primary Chair:  Ryan P Abernathey, Lamont -Doherty Earth Observatory of Columbia University, Palisades, NY, United States
Co-chairs:  Irina Rypina, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Jonathan M Lilly, Northwest Research Associates, Bellevue, WA, United States and Shane R Keating, University of New South Wales, Sydney, NSW, Australia
Moderators:  Irina Rypina, WHOI, Woods Hole, MA, United States, Jonathan M Lilly, Northwest Research Associates, Bellevue, WA, United States and Shane R Keating, University of New South Wales, Sydney, NSW, Australia
Student Paper Review Liaison:  Jonathan M Lilly, Northwest Research Associates, Bellevue, WA, United States
Index Terms:

4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4528 Fronts and jets [OCEANOGRAPHY: PHYSICAL]
4568 Turbulence, diffusion, and mixing processes [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • OM - Ocean Modeling
  • PL - Physical Oceanography: Mesoscale and Larger

Abstracts Submitted to this Session:

A Global Atlas of Coherent Lagrangian Vortices from Satellite Altimetry (320231)
Ryan P Abernathey, Lamont -Doherty Earth Observatory of Columbia University, Palisades, NY, United States, Ci Zhang, Lamont Doherty Earth Observatory, New York, NY, United States and Nathaniel Eli Tarshish, Princeton University, Princeton, NJ, United States
Global Census of Coherent Lagrangian Vortices In A Mesoscale-Permitting Ocean Model (321716)
Nathaniel Eli Tarshish, Princeton University, Princeton, NJ, United States, Ryan Abernathey, Columbia University of New York, Palisades, NY, United States, Carolina O. Dufour, McGill University, Department of Atmospheric and Oceanic Sciences, Montreal, QC, Canada, Ivy Frenger, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Stephen Matthew Griffies, NOAA/GFDL, NJ, United States and Ci Zhang, Lamont Doherty Earth Observatory, New York, NY, United States
Interannual Variability of Mixing in the Gulf Stream (308341)
Thomas Bolton, University of Oxford, Department of Physics, Oxford, United Kingdom, Ryan Abernathey, Columbia University of New York, Palisades, NY, United States and Laure Zanna, University of Oxford, Dept. of Physics, Oxford, United Kingdom
Quantifying Residual, Eddy, and Mean Flow Effects on Mixing in an Idealized Circumpolar Current (322946)
Phillip J. Wolfram Jr and Todd Ringler, Los Alamos National Laboratory, Los Alamos, NM, United States
Understanding Mixing in an Idealized Circumpolar Current using a Generalized Lagrangian Mean-based Decomposition (323515)
Rachel Robey, Los Alamos National Laboratory, Los Alamos, NM, United States and Phillip J. Wolfram Jr, LANL, LOS Alamos, NM, United States
The dynamics of buoyant particles in the Ocean Surface Mixed Layer under free-convection (319015)
Tomas Chor, University of California Los Angeles, Los Angeles, CA, United States, Di Yang, University of Houston, Department of Mechanical Engineering, Houston, TX, United States, Charles Vivant Meneveau, Johns Hopkins Univ, Baltimore, MD, United States and Marcelo Chamecki, University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
Reduced-Order Quasilinear Dynamics of Ocean Surface Boundary-Layer Flows (320709)
Joseph Skitka1, Brad Marston2 and Baylor Fox-Kemper2, (1)Brown University, Physics, Providence, RI, United States, (2)Brown University, Providence, RI, United States
Nonlocal Fluxes and Surface Coherent Structures in Modeling Langmuir Turbulence (323416)
Ramsey R Harcourt, Applied Physics Laboratory University of Washington, Seattle, WA, United States
Layering and mixing in pancake vortices (305152)
Georgi Sutyrin, Univ Rhode Island, Narragansett, RI, United States and Timour Radko, NPS, Monterey, CA, United States
A Statistical Model for Lagrangian Surface Drifters Near the Equator (321421)
Arthur P. Guillaumin1, Adam M Sykulski2, Sofia C Olhede1, Jeffrey J Early3 and Jonathan M Lilly3, (1)University College London, London, United Kingdom, (2)Lancaster University, Lancaster, United Kingdom, (3)NorthWest Research Associates, Redmond, WA, United States
Revealing coherent material transport through fuzzy C-means clustering (317659)
Michael Allshouse, Northeastern University, Department of Mechanical and Industrial Engineering, Boston, MA, United States
Scalable Methods for Graph-Based Analysis of Lagrangian Particles in Geophysical Flows (314728)
Aaron Coutino1, Kristopher Rowe2 and Marek Stastna1, (1)University of Waterloo, Waterloo, ON, Canada, (2)Cornell University, NY, United States
Impact of Interpolation and Numerical Integration Schemes on Identification of Transport Barriers (323248)
Tor Nordam, SINTEF Ocean, Environmental Technology, Trondheim, Norway
Time–Dependent Quasi–Rigid Sets in Oceanic Flows Through Flow Map Composition (326321)
Chinmay Kulkarni and Pierre F J Lermusiaux, Massachusetts Institute of Technology, Cambridge, MA, United States
An Online Gateway for Lagrangian Analysis of Ocean Surface Transport (326627)
Siavash Ameli, University of California, Berkeley, CA, United States and Shawn Shadden, University of California, Berkeley, Berkeley, CA, United States
Meso- and submesoscale features of upwelling filaments off Namibia (310415)
Kerstin Jochumsen, University of Hamburg, Institute of Experimental Oceanography, Hamburg, Germany, Alexa Griesel, University of Hamburg, Institute of Oceanography, Germany and Julia Draeger-Dietel, University of Hamburg, Experimental Oceanography, Hamburg, Germany
Mixing in the North Atlantic Oxygen Minimum Zone Revealed by Isopycnal RAFOS Floats (312200)
Donald W Rudnickas Jr, University of Rhode Island Narragansett Bay - Graduate School of Oceanography, Narragansett, RI, United States, Jaime B Palter, University of Rhode Island, Kingston, RI, United States, Dave Hebert, Fisheries and Oceans Canada Dartmouth, Dartmouth, NS, Canada and H. Thomas Rossby, Univ Rhode Island, Narragansett, RI, United States
Effect of small scale transport processes on phytoplankton distribution in coastal seas (319925)
Alejandro Orfila, IMEDEA (Mediterranean Institute for Advanced Studies), Esporles-Mallorca, Spain, Ismael Hernández-Carrasco, SOCIB, Esporles, Spain, Vincent Rossi, CNRS-MIO, Mediterranean Institute of Oceanography, Marseille, France, Veronique Garcon, CNRS-LEGOS, Toulouse, France and Anna Rubio, AZTI-Tecnalia, Marine Research Division, Pasaia, Spain
Effects of Physical Inertia on Sargassum Distribution and Growth (322874)
Anastasia Wright, Maine Maritime Academy, Castine, ME, United States, Victoria Coles, University of Maryland Center for Environmental Science, Horn Point Laboratory, Cambridge, MD, United States and Maureen T Brooks, University of Maryland Center for Environmental Science Horn Point Laboratory, Cambridge, MD, United States

See more of: Physical Oceanography: Mesoscale and Smaller