Comparisons between Eulerian and Lagrangian measurements in the
Comparisons between Eulerian and Lagrangian measurements in the SW South Atlantic. Arcilan T. Assireu & João A. Lorenzzetti Division of Remote Sensing National Space Research Institute 3/9/2021 1
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 3/9/2021 2
AREA OF STUDY 3/9/2021 3
METHODS • Progressive vector diagrams (for mooring data) • Maximum Entropy Spectrum • Assimetric Fragmentation (FA) operator 3/9/2021 4
METHODS • Progressive vector diagrams (for mooring data) 3/9/2021 5
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 3/9/2021 6
RESULTS Current meter Mooring – Summer of 1993 3/9/2021 7
RESULTS 3/9/2021 Summer 1993 8
RESULTS Winter 1993 3/9/2021 9
RESULTS Seasonal Variability in the Current Meter Data 3/9/2021 10
RESULTS Current Meter – Spectral Analysis 3/9/2021 11
RESULTS Drifter – Spectral Analysis 3/9/2021 12
RESULTS Drifter – Spectral Analysis 30 days 10 days Log ( 3/9/2021 ) 13
RESULTS Local FA (PVD for current meter data) 3/9/2021 14
RESULTS Local FA (drifter trajectory time series - 1997) 3/9/2021 15
RESULTS Current Meter x Drifter parameters 3/9/2021 16
RESULTS 3/9/2021 17
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