Turbulence Measurement of the Planetery Boundary Layer from a 213m Meteorological Tower

Abstract

The results of turbulence measurement on the 213m meteorological tower using sonic anemometer-thermometers, thermocopule psychrometers, Lyman-alpha hygrometers and an infrared hygrometer are reported. The main part of the obseravtion was continued for 23 hours and the time variations of statistics of turbulence in the planetary boundary layer are analysed. Heat balance at the ground surface during a day is studied assuming the ground heat flux as a residual of heat balance equation. Budget equations of turbulent kinetic energy, temperature variance, humidity variance and turbulent fluxes, <w'T'>^^^ and <w'q'>^^^ are also investigated in the diurnally varying planetary boundary layer below 200m.