Authors : Asemeh Tooranqi
Abstract: In 1904, Prandtl represented the concept of boundary layer, boundary layer of atmosphere is called to the area of atmosphere that is located just after Earths surface in which great turbulence is observed in vertical transfer of heat, humidity and air displacement than troposphere. Air flow higher than earths surface can be as thin and turbulent layers. Since, horizontal wind velocity on the surface is zero, velocity is increasing by altitude immediately. In thin (non-turbulent) layers of flow, no considerable mixing is performed in slide layers of air. Mixing heat, steam and moving inside boundary layer, creates a separated effect on vertical profile of temperature, steam and wind velocity. In the layers close to earths surface, turbulence of heat, humidity and movement are under the influence of their distance from surface elements like stones, plants and corns. Near to sea shore, there is a cold boundary layer, its depth is changing during day, strong weather inversion separates cold sea boundary layer and above hot weather. In the average distance of 60 km from shore, there is a strong daytime signal in relation with heating and cooling of surface. Also, weak inversion between 825-850 m bar can be observed. In farthest distances from shore about 130 km, the depth of boundary layer is high during day and no sign of inversion exists. Therefore, an upstream ocean cold flow can have great impact on the structure of boundary layer.
Asemeh Tooranqi , 2016. Investigating the Features of Desert Areas on the Climate of Boundary Layer. Research Journal of Applied Sciences, 11: 1653-1656.