Sverdrup unit

Sverdrup (Sv) is a standard transport unit in physical oceanography for expressing volumetric flow rates of large-scale currents.

One Sverdrup equals one million cubic meters per second, which makes the unit suitable for describing basin-scale transports that would be awkward to express in smaller units.

It is commonly used for currents, overturning circulation estimates, and transport diagnostics in ocean-atmosphere studies.