The DUACS-DT2018 reprocessed sea level time series soon available in CMEMS

Maxime Ballarotta (Collecte Localisation Satellites (CLS), France)

CoAuthors

Guillaume TABURET (Collecte Localisation Satellites (CLS), France); Marine LIEVIN (Collecte Localisation Satellites (CLS), France); Marie-Isabelle PUJOL (Collecte Localisation Satellites (CLS), France); Jean-François LEGEAIS (Collecte Localisation Satellites (CLS), France); Yannice FAUGERE (Collecte Localisation Satellites (CLS), France); Gérald DIBARBOURE (Centre National d'Etudes Spatiales (CNES), France)

Event: 2017 Ocean Surface Topography Science Team Meeting

Session: Science III: Mesoscale and sub-mesoscale oceanography

Presentation type: Type Poster

The DUACS system produces, as part of the Copernicus Marine Environment and Monitoring Service (CMEMS), high quality multimission altimetry Sea Level products for oceanographic applications, climate forecasting centers, geophysic and biology communities... These products consist in directly usable and easy to manipulate Level 3 (along-track cross-calibrated Sea Level Anomaly SLA) and Level 4 (multiple sensors merged as maps or time series) products and are available in global and regional version (Mediterranean Sea, Arctic, European Shelves …).

A full reprocessing is carried out almost every 3 years based on the state-of-the-art Level 2 to Level 4 algorithms. Early next year, a new version will be available through the CMEMS catalogue. It will cover the entire 1993 – 2016 period and would benefit from major improvements associated with new altimeter and mapping standards.

Here, we report the first results of this upcoming multi-mission reprocessing. We present the DUACS-DT2018 reprocessing and evaluate the changes associated with the new standards. Several comparisons with independent dataset (along-track, drifters, tide gauges) show that the new altimeter standards participate in up to 5% improvements of the SLA mapping mainly near coastal areas and at high latitude compared with the DUACS-DT2014 dataset. The new mapping standards contribute to ~2% improvement mainly in the inter-tropical band and in high variability regions. Additionally, we found that the mesoscale scale structures are particularly improved in the regional Mediterranean Sea product.
 

Poster show times:

RoomStart DateEnd Date
Concerto Ballroom Thu, Oct 26 2017,14:00 Thu, Oct 26 2017,18:00
Maxime Ballarotta
Collecte Localisation Satellites (CLS)
France
mballarotta@cls.fr