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Integration of Eulerian and Lagrangian Measurements in SW South Atlantic Study

Comparing Eulerian (current meter mooring) & Lagrangian (drifter) data coherency via vector diagrams, spectrum analysis, and fragmentation operator in the SW South Atlantic. Results show seasonal variability and local integration parameters.

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Integration of Eulerian and Lagrangian Measurements in SW South Atlantic Study

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  1. Comparisons between Eulerian and Lagrangian measurements in the SW South Atlantic. Arcilan T. Assireu & João A. LorenzzettiDivision of Remote SensingNational Space Research Institute

  2. OBJECTIVE OF THE STUDY • To verify the possibility of integrating Eulerian (current meter mooring) and Lagrangian (drifter) data for SW South Atlantic • MOTIVATION • To test the coherency between these data sets

  3. AREA OF STUDY

  4. METHODS • Progressive vector diagrams (for mooring data) • Maximum Entropy Spectrum • Assimetric Fragmentation (FA) operator

  5. METHODS • Progressive vector diagrams (for mooring data)

  6. METHODS • Assimetric Fragmentation Operator (FA) FA = (I-L) / L I = n. lines of Delaunay triangulation L = n. of assimetric vectors FA = 1.222 in the example

  7. RESULTS Current meter Mooring – Summer of 1993

  8. RESULTS Summer 1993

  9. RESULTS Winter 1993

  10. RESULTS Seasonal Variability in the Current Meter Data

  11. RESULTS Current Meter – Spectral Analysis

  12. RESULTS Drifter – Spectral Analysis

  13. RESULTS Drifter – Spectral Analysis 30 days 10 days Log ( 3 days Log ( )

  14. RESULTS Local FA (PVD for current meter data)

  15. RESULTS Local FA (drifter trajectory time series - 1997)

  16. RESULTS Current Meter x Drifter parameters

  17. RESULTS

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