Abstract
We extend the Horn-Schunck model of flow field computation to incorporate incompressibility for tracking fluid motion. This is expressed as a weak form of zero-divergence constraint in the variational problem and implemented with a multigrid approach for efficient computation. The resulting feature displacement velocity field provides the basis for higher level abstraction and representation of the data for data mining. A robust and efficient algorithm, based on the Jordan curve index, for detecting vortices and saddle points in feature displacement fields derived from sequences of satellite-derived SST fields is presented.
Original language | English (US) |
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Pages (from-to) | 331-334 |
Number of pages | 4 |
Journal | Geophysical Research Letters |
Volume | 28 |
Issue number | 2 |
DOIs | |
State | Published - Jan 15 2001 |
ASJC Scopus subject areas
- Geophysics
- Earth and Planetary Sciences(all)