The salinity of seawater at the ocean surface can be remotely sensed using
microwave frequencies. Currently, this technique is valid for open ocean
measurements, while recognizing decreased sensitivity for colder water.
Measurements within approximately 50 km of land are biased by land
contamination and less accurate. Salinity is a defining parameter for ocean
dynamics and can also serve as a proxy for certain biogeochemical processes.
The following list shows the near real time Sea Surface Salinity data
products available from NOAA CoastWatch.