Correlation coefficients in urban turbulence

Based on fluctuational observations of three-component wind velocity (u', v', w') and temperature, T', from a meteorological tower of 325 m located in Beijing, China, a number of turbulent linear correlation coefficients are calculated using a local scaling approach for turbulence statistics. The further applicability of this scaling is investigated by the formulation of similarity relationships for correlation coefficients of momentum transfer e.g., vertical bar r(uw vertical bar), vertical bar r(vw vertical bar) and vertical bar r(uv)vertical bar, heat transfer e.g., vertical bar r(uT)vertical bar, vertical bar r(vT vertical bar) and vertical bar r(wT vertical bar), and the ratios vertical bar r(wT) /r(uw vertical bar) and vertical bar r(vT) /r(vw vertical bar). Under various stratifications, empirical similarity relationships for most of these correlation coefficients are derived to be function of a single local stability parameter and found to be in good agreement with experimental results.