New CNES CLS 2019 Mean Sea Surface: First Validation
Work is ongoing to compute a new CNES_CLS MSS model. It is based on the integration of more than 25 years of altimetric data, using more than 10 altimeters from the historical Topex/Poseidon to the in-flight Sentienl-3A mission. As well as the previous 2015 version this new determination is focused on the fallowing points of improvement which remains a permanent challenge:
- the correction of ocean variability, especially for wavelengths between 50 and 200 km.
- the accuracy of altimetric data and therefore of the MSS near the coast, particularly since MSS can serve as a reference for studying the coastal vulnerability.
- a fine-tuned determination of the Arctic zone, which is a major indicator of climate change.
- a most accurate mapping of the finest topographic structures for wavelengths less than 30 km, in preparation of a new reference for the upcoming SWOT mission.
We therefore propose a synthesis of analyzes of these different aspects in order to quantify the improvements of this new MSS compared to the other existing models.