Impact of internal tide correction on the DUACS maps accuracy
Event: 2019 Ocean Surface Topography Science Team Meeting
Session: Tides, internal tides and high-frequency processes
Presentation type: Type Oral
The along track altimeter products used to generate the DUACS gridded Sea Level Anomalies products currently disseminated in CMEMS are not corrected from the internal tide effects. Recent studies highlighted the existence of residual tidal variability in the grids (Zaron, 2019), representing a pollution of the 2D mesoscale signal retrieved. An experimental dataset has been produce using a prior correction (Zaron model) for the along track data following the OSTST 2018 recommendation. The impact of this correction on the map accuracy has been assessed here over a 5-year period. Various diagnoses were implemented including comparisons to independent dataset to quantify the improvement. A tuning of the mapping algorithm is finally considered to optimize the effect of this correction.