sea level; surface of the sea
Refers to the surface of the sea, often in contexts of height, temperature, or conditions at the surface.
The surface of the sea is as calm as a mirror.
The sea level is rising due to global warming.
Pieces of driftwood were floating on the surface of the sea.
This lighthouse stands 30 meters above sea level.
In winter, the sea's surface can freeze in the northern seas.
sea level change; eustatic change
reduction to mean sea level; sea-level pressure correction