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.

Upcoming Events »

Air-Sea Interaction Session at EGU
CLIVAR workshop: Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans

Latest News »

JPL SMAP Sea Surface Salinity (SSS) CAP V4.2 Dataset Released
First Official Release of the Saildrone Baja Field Campaign Dataset
SMAP Sea Surface Salinity (SSS) V3.0 Dataset from Remote Sensing Systems (RSS) Released

Recent Publications »

Seven Years of SMOS Sea Surface Salinity at High Latitudes: Variability in Arctic and Sub-Arctic Regions
An Observational Perspective of Sea Surface Salinity in the Southwestern Indian Ocean and Its Role in the South Asia Summer Monsoon
SMAP and CalCOFI Observe Freshening during the 2014-2016 Northeast Pacific Warm Anomaly