EVIDENCE OF SEA-BREEZE FLOW AT THE TOP OF HYMETTOS MOUNTAIN

Results from an observational study of a sea-breeze flow at the top of a steep mountain are presented and discussed. Measurements of the profiles of temperature, humidity, wind speed and direction from a tethered balloon are given together with the hourly variations of the same parameters at surface level. The thermal structure of the atmospheric boundary layer (ABL) along with the profiles of the temperature structure parameter (C(T)2) and the vertical wind component variance (sigma(omega)2) obtained by acoustic sounder at the mountain top are also included. An attentive examination of the collected data indicates the presence of sea-breeze flows on top of the 1000 m height mountain. This is of importance, especially in cases like Athens, where the understanding of the wind flow is necessary for the study of the air pollution problem.