Critical richardson number
From Glossary of Meteorology
critical Richardson number[edit | edit source]
The value of the gradient Richardson number below which air becomes dynamically unstable and turbulent.
This value is usually taken as Ric = 0.25, although suggestions in the literature range from 0.2 to 1.0. There is also some suggestion of hysteresis, where laminar air flow must drop below Ri = 0.25 to become turbulent, but turbulent flow can exist up to Ri = 1.0 before becoming laminar.
Term edited 24 August 2023.
