Detection of coherent oceanic structures via transfer operators
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In: Physical Review Letters, Vol. 98, No. 22, 224503, 01.06.2007.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Detection of coherent oceanic structures via transfer operators
AU - Froyland, Gary
AU - Padberg, Kathrin
AU - England, Matthew H.
AU - Treguier, Anne Marie
PY - 2007/6/1
Y1 - 2007/6/1
N2 - Coherent nondispersive structures are known to play a crucial role in explaining transport in nonautonomous dynamical systems such as ocean flows. These structures are difficult to extract from model output as they are Lagrangian by nature and not revealed by the underlying Eulerian velocity fields. In the last few years heuristic concepts such as finite-time Lyapunov exponents have been used in an attempt to detect barriers to oceanic transport and thus identify regions that trap material such as nutrients and phytoplankton. In this Letter we pursue a novel, more direct approach to uncover coherent regions in the surface ocean using high-resolution model velocity data. Our method is based upon numerically constructing a transfer operator that controls the surface transport of particles over a short period. We apply our technique to the polar latitudes of the Southern Ocean.
AB - Coherent nondispersive structures are known to play a crucial role in explaining transport in nonautonomous dynamical systems such as ocean flows. These structures are difficult to extract from model output as they are Lagrangian by nature and not revealed by the underlying Eulerian velocity fields. In the last few years heuristic concepts such as finite-time Lyapunov exponents have been used in an attempt to detect barriers to oceanic transport and thus identify regions that trap material such as nutrients and phytoplankton. In this Letter we pursue a novel, more direct approach to uncover coherent regions in the surface ocean using high-resolution model velocity data. Our method is based upon numerically constructing a transfer operator that controls the surface transport of particles over a short period. We apply our technique to the polar latitudes of the Southern Ocean.
KW - Didactics of Mathematics
UR - http://www.scopus.com/inward/record.url?scp=34547247743&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/2f8c991e-cff7-3bfb-8c0b-bdd1d431c2fc/
U2 - 10.1103/PhysRevLett.98.224503
DO - 10.1103/PhysRevLett.98.224503
M3 - Journal articles
C2 - 17677849
AN - SCOPUS:34547247743
VL - 98
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 22
M1 - 224503
ER -