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 »

New SPURS-2 Field Campaign Datasets Released
NASA-ESA Announce Collaborative Salinity Efforts
Version 4.0 SMAP Sea Surface Salinity Data Released
Further SPURS-2 Field Campaign Datasets Released

Recent Publications »

L-band Remote-sensing Increases Sampled Levels of Global Soil Moisture-air Temperature Coupling Strength
State of the Climate in 2018
Eastern Mediterranean Salinification Observed in Satellite Salinity from SMAP Mission
Estimating Rain-Generated Turbulence at the Ocean Surface Using the Active Controlled Flux Technique