Comparison of In-Situ and Satellite Measurements of Sea Surface Salinity in Coastal Southern California

Our objective is to determine to what extent coastal sea surface salinity (SSS) data represents offshore SSS measurements. Offshore time series of SSS from ships are sparse because of ship-related costs, and now widely available global satellite measurements exclude the area within about 25 km of the coast. Our dataset will be used to evaluate satellite SSS measurements with the aim of guiding improvements of satellite instruments to measure coastal SSS.