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Article Dans Une Revue Sensors Année : 2016

Validation and parameter sensitivity test for reconstructing swell field based on Ensemble Kalman filter

Résumé

The swell propagation model built on geometric optics is known to work well when simulating radiated swells from a far located storm. Based on this simple approximation, satellites have acquired plenty of large samples on basin-traversing swells induced by fierce storms situated in mid-latitudes. How to routinely reconstruct swell fields with these irregularly sampled observations from space via known swell propagation principle requires more examination. In this study, we apply 3-h interval pseudo SAR observations in the ensemble Kalman filter (EnKF) to reconstruct a swell field in ocean basin, and compare it with buoy swell partitions and polynomial regression results. As validated against in situ measurements, EnKF works well in terms of spatial-temporal consistency in far-field swell propagation scenarios. Using this framework, we further address the influence of EnKF parameters, and perform a sensitivity analysis to evaluate estimations made under different sets of parameters. Such analysis is of key interest with respect to future multiple-source routinely recorded swell field data. Satellite-derived swell data can serve as a valuable complementary dataset to in situ or wave re-analysis datasets.
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Origine : Publication financée par une institution

Dates et versions

hal-01443972 , version 1 (23-01-2017)

Identifiants

Citer

Xuan Wang, Pierre Tandeo, Ronan Fablet, Romain Husson, Lei Guan, et al.. Validation and parameter sensitivity test for reconstructing swell field based on Ensemble Kalman filter. Sensors, 2016, 16 (12), pp.art.2000 - ⟨10.3390/s16122000⟩. ⟨hal-01443972⟩
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