The global ocean covers more than 70% of Earth's surface and holds approximately 97% of the planet's water. NASA's Earth-observing satellites collect data that help scientists understand how the ocean supports marine ecosystems, regulates global climate, produces atmospheric oxygen, and stores carbon dioxide. 

NASA's ocean data products include measurements of ocean circulation patterns, surface winds, and heat transfer between the ocean and atmosphere, such as sea surface temperature, salinity, and height variations. The data also capture water quality indicators including turbidity levels, chlorophyll concentrations that show phytoplankton activity, and dissolved organic matter. 

Additionally, NASA's optical measurements support studies of global sea level changes over time. These comprehensive datasets from multiple satellite instruments enable researchers to monitor ocean health, validate climate models, and advance our understanding of Earth's interconnected systems.