Temperature Ramps in the Atmospheric Surface Layer

摘要: Abstract A review of the evidence for organized temperature structure observed in both atmospheric surface layer and laboratory boundary reveals similar features between two turbulent flows. This similarity suggests that ramp may be interpreted as signature an large-scale motion rather than a necessary consequence presence buoyant plumes. An experiment was conducted which translation velocity Ut sharp edge is determined from transit time thermistors placed at same height marine but separated direction parallel to wind. found more nearly constant ratio local friction velocity. Velocities phase angle cross spectrum optimum correlation obtained are reasonable agreement with Ut. Cross correlation...