Recently, new instruments allow measuring sea surface salinity at 15cm-50cm depth by autonomous drifters and at 1cm depth by L-band satellite radiometry. In this paper, we report new results about SSS freshenings in tropical regions linked to rain events as observed in situ and from SMOS satellite. Drifters SSS indicate a freshening of a few tenths of psu lasting for several hours. SMOS SSS collocated with SSM/I rainfall indicate a freshening of 0.2psu.mm-~1.hr-~1. When average over the tropical Pacific Ocean and over one month, the salinity difference between 1cm and 5m depth is estimated to be 0.1psu.
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