microscale

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.

1. The study of the physics, chemistry, and dynamics of the earth's atmosphere, including the related effects at the air–earth boundary over both land and the oceans. Fundamental topics include the composition, structure, and motion of the atmosphere. The goals ascribed to meteorology are the complete understanding and accurate prediction of atmospheric phenomena.

An imaginary bundle of propagating electromagnetic or acoustic energy, the lateral dimensions of which are negligible.

A series of operational polar-orbiting meteorological satellites launched by the former Soviet Union since 1969.