A transfer operator based numerical investigation of coherent structures in three-dimensional Southern ocean circulation

• Main Authors: Froyland, Gary, Schwalb, Marcel, Padberg, Kathrin, Dellnitz, Michael
• Other Authors: Kolumban, Geza, Endo, Tetsuro
• Format: Other Non-Article Part of Journal/Newspaper
• Language: English
• Published: Research Society of Nonlinear Theory and Its Application 2008
• Subjects: /dk/atira/pure/core/keywords/mathematik; Mathematics; Southern Ocean; Antarc*; Antarctica
• Online Access: http://fox.leuphana.de/portal/de/publications/a-transfer-operator-based-numerical-investigation-of-coherent-structures-in-threedimensional-southern-ocean-circulation(affb0440-b06b-4e88-ba74-8ed7d802f754).html; https://pure.leuphana.de/ws/files/8752063/FrPaSchDe_nolta2008k.pdf; http://www.ieice.org/nolta/symposium/archive/2008/nolta08toc.pdf; http://www.ieice.org/proceedings/NOLTA2008/articles/B3L-B1-Froyland-2210.pdf

We report on a numerical investigation of three-dimensional circulation in the Southern Ocean over a domain extending from Antarctica to -36 degrees latitude and from the sea surface to a depth of 500 metres. The high latitude Southern Ocean is a region low in measurements but important for climatic and biological applications. Our investigation is based upon velocity data simulated by a state-of-the-art 1/4 degree resolution global ocean model. We construct an approximate transfer operator from the velocity data and identify dominant coherent circulation structures from eigenmodes of the transfer operator.