Ocean tide and loading altimetric corrections computed - with SIROCCO Tools : https://sirocco.obs-mip.fr/other-tools/prepost-processing/comodo-tools - from FES2014 atlases : https://doi.org/10.6096/3001 - for all altimetric missions. Validation available at ftp://ftp.legos.obs-mip.fr/pub/ecola/FES2014/CTOH/2021-02-diff-libfes-tools.pdf

Climatology of near-inertial currents. Global climatology of near-inertial current characteristics from satellite-tracked drifters. Data analysed : 8500 near-surface satellite-tracked drifter trajectories with drogues attached at 15 m depth.

The mean and time-varying position of the main Southern Ocean polar fronts has been calculated from a combination of gridded altimetric sea level anomalies and a new climatology of mean sea level constructed from historical data and ARGO T / S profiles.

The Sargassum group at LEGOS (Laboratoire d’Études en Géophysique et Océanographie Spatiales) brings together oceanographers, modelers, and remote-sensing specialists to study the dynamics of pelagic Sargassum in the tropical Atlantic and Caribbean, with the aim of better understanding its origin, transport, variability, and coastal impacts. Our goal is to link basin-scale oceanic processes to coastal Sargassum arrivals by combining observations and numerical modeling, in order to improve the monitoring and predictability of Sargassum events. We develellop seasonal early-warning systems and contributes to improved management of Sargassum impacts in affected regions. Scientific focus : Coastal stranding processes and regional impacts in the Caribbean, the Gulf of Mexico, and West Africa Sources and growth of pelagic Sargassum in the tropical Atlantic Transport pathways driven by currents, winds, and mesoscale circulation Seasonal to interannual variability, including extreme years

Routine operation over a period shorter than 5 years (Enhanced Observation Period, EOP)

Routine operation over a period shorter than 5 years (Enhanced Observation Period, EOP)

The gridded Sea Surface Salinity (SSS) data set covers the region between 95°W – 20°E and 50°N – 30°S in the Atlantic Ocean. It is based on available data collected from 1970 to 2016 mostly from Voluntary Observing Ships, PIRATA moorings and Argo profilers, and subsequently validated. This monthly SSS product is gridded using an objective mapping at the spatial resolution 1° x 1°. It is distributed with its associated error fields. It is an update of the SSS product presented in Reverdin et al (2007).

Sea Surface Salinity (SSS) is an essential climate variable that requires long term in situ observation. The French SSS Observation Service (SSS-OS) manages a network of Voluntary Observing Ships equipped with thermosalinographs (TSG) since 2002. The network is global though more concentrated in the tropical Pacific and North Atlantic oceanic basins. The acquisition system is autonomous with real time transmission and is regularly serviced at harbor calls. The high resolution data retrieved from the acquisition system during ship calls is processed through a dedicated software (freely available) for attribution of data quality flags by visual inspection, and correction of TSG time series by comparison with climatology, onboard daily water samples and collocated Argo data. Details can be found in the reference below. The validated delayed time data collected from TSG, together with some bucket samples mostly collected before 2002, are made available for educational and research purposes through an interactive web interface.

The annually binned Sea Surface Salinity data set covers a large part of the Atlantic Ocean (75°W-10°E, 20°S-70°N). It is based on salinity near-surface data collected since December 1895 to 2016 from all data sources, including Voluntary Observing Ships subsequently validated. This annual product presents Atlantic SSS 32 grid box anomaly and error time-series (for boxes 1 to 26, year 2016 not smoothed 1-2-1), as well as Atlantic SSS grid box coordinates and March-May mean climatology. The SSS binned time series are an update from the 1896-2013 time series (Friedman et al., 2017).

The binned Sea Surface Salinity, Temperature and Density data set covers regularly sampled ship-of-opportunity lines. It is based on data collected from 1993 to 2018 from Voluntary Observing Ships subsequently validated. This monthly product is binned with monthly total values deviations and then deviations from climatology in each bin, with additional 1-2-1 time filter applied on the averages. Along B-AX01, some gaps were filled with additional data located one degree north or south of the grid boxes.