From Glossary of Meteorology


Atmospheric motions with Lagrangian Rossby numbers greater than 200 or spatial scales 2 km or less.

Emanuel, K. A. 1986. Overview and definition of mesoscale meteorology. Mesoscale Meteorology and Forecasting. P. Ray, Ed., Amer. Meteor. Soc., . P. 13.

Orlanski, I. 1975. A rational subdivision of scales for atmospheric processes. Bull. Amer. Meteor. Soc.. 56. 527–530.