A new version (version 2) of SMOS Arctic Level 3 Sea Surface Salinity is available

A new version (version 2) of SMOS Arctic Level 3 Sea Surface Salinity is available at CATDS CEC-OS (see more information and product access here). It has been developped by LOCEAN and ACRI-st.

With respect to SMOS ARCTIC SSS L3 V1, main changes are as follows:

– 9-day and 18-day maps are provided over the June 2010 to August 2023 period,
– the methodology originally derived by Supply et al. [2020] and implemented in SMOS ARCTIC SSS V1 has been revisited,
– a temporal optimal interpolation with systematic corrections depending on the SMOS observation geometry has been added,

Comparisons with independent in situ datasets, conducted in CEC LOCEAN and in PIMEP, indicate a clear improvement (reduction of std difference by ~a factor 2 and systematic increase of r2); with V2.0 r2 is greater than 0.8 with 40% of the data sets considered at PIMEP.

Feedbacks about these new products are very welcome.