Richardson number

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Richardson number

The dimensionless ratio of buoyant suppression of turbulence to shear generation of turbulence.

It is defined as
ams2001glos-Re41
where g is the acceleration of gravity, β a representative vertical stability (commonly ∂θ/∂z, where θ is potential temperature), and ∂u/∂z is a characteristic vertical shear of the wind. It is used as a dynamic stability measure to determine if turbulence will exist.
See gradient Richardson number, bulk Richardson number, critical Richardson number, flux Richardson number.

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