Characteristics of wind speed and wind direction in the atmospheric boundary layer on the southern coast of Bulgaria

The characteristics of wind speed and wind direction in the boundary atmospheric layer measured at the meteorological station in Akhtopol (Bulgaria) are presented. The measurements were carried out with the Scintec sodar and MK-15 automatic meteorological station. The sodar measurement data on wind parameters at different heights in different months are presented as well as the frequency of inshore and offshore wind directions, that enables to trace the intensity of the breeze circulation. The frequency of calms and wind speeds at the heights of 50, 100, and 200 m according to gradations for different months and the probability of wind of various speeds depending on the direction are also given. The breeze front characteristics in June–September of 2009 are computed from the speed and direction of surface wind measured with the acoustic anemometer of MK-15 complex.