Scale analysis of atmospheric turbulence at 2 m

Various horizontal scales of the horizontal wind components are compared in stable and unstable air. In stable air the scales are small, and those along the wind are larger than the scales across the wind. In unstable air the scales are large and about the same in all directions. The speed of translation of turbulent patterns normally does not deviate much from the wind speed, with one curious exception. The ratio of the Lagrangian scale of lateral component to the Eulerian scale of lateral component averages about 5 in stable air with moderate winds, but is tentatively suggested to be considerably smaller in unstable air.