Salt is essential. Circulating through our bodies and our seas, it impacts the health of people and the planet. Salt dissolved in seawater – measured as salinity – drives currents that distribute heat and carbon around the globe. So, salt not only preserves our food, it helps to preserve our climate by contributing to global ocean circulation.

Earth is an ocean planet. Key water cycle processes – precipitation and evaporation – mostly occur over the ocean. Thus, monitoring sea surface salinity patterns provides important clues about changes in our environment.

NASA observes salinity. Merging data from satellites and other instruments, our mission is to better understand ocean circulation, the water cycle, and climate.

Latest News »

Progress in Ocean Salinity Science
SPURS-2 Field Campaign Datasets Released
JPL SMAP Sea Surface Salinity (SSS) CAP V4.2 Dataset Released
First Official Release of the Saildrone Baja Field Campaign Dataset

Recent Publications »

Satellite Salinity Observing System: Recent Discoveries and the Way Forward
Intraseasonal Variability of Surface Salinity in the Eastern Tropical Pacific Associated With Mesoscale Eddies
Sea Surface Salinity Distribution in the Southern Ocean as Observed from Space
Seven Years of SMOS Sea Surface Salinity at High Latitudes: Variability in Arctic and Sub-Arctic Regions