The High-Frequency Fluctuation of the Wind in the First Kilometer of the Atmosphere


  • C. J. Readings,

  • D. R. Rayment


This paper describes some preliminary experiments made at Cardington during 1968 to measure the fluctuations of wind inclination in the frequency range 0.1–3 Hz. The measurements were made at heights up to about 1 km by using a tethered balloon. The results illustrate the intermittency of atmospheric turbulence and show the way in which the implied average rate of dissipation of turbulent kinetic energy varies with height under different daytime stability conditions including overhead inversions. The results are also broadly consistent with a buoyancy production that is roughly constant with height in the convective layer (and is the dominant contribution at the greater heights) and a mechanical production that falls off roughly as 1/z.