The Global Sea Level Observing System (GLOSS), a component of the Global Ocean Observing System (GOOS), is establishing a well-designed, high-quality sea level observing network to support a broad research and operational user base.

Sea level data are vital for

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Research into sea level change and ocean circulation

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Coastal protection during events such as storm surges

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Providing flood warning and monitoring tsunamis

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Tide tables for port operations, fishermen, and recreation

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Defining datums for national or state boundaries


Sea level is one of the most useful oceanographic variables, used for a wide variety of scientific, economic and social purposes.

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