tuuliprofiilin

Tuuliprofiili refers to the variation of wind speed with height above the ground. This phenomenon is primarily driven by the Earth's surface friction, which slows down wind near the ground. As altitude increases, this frictional effect diminishes, leading to higher wind speeds. The rate at which wind speed increases with height is influenced by several factors, including the roughness of the terrain, atmospheric stability, and the presence of obstacles like buildings or trees.

In open, smooth terrain, the wind profile typically shows a more gradual increase in speed with height. Conversely, rougher surfaces and urban environments create stronger turbulence and a steeper wind profile, meaning wind speed increases more rapidly as you move away from the surface. Atmospheric stability also plays a role; in unstable conditions, the wind is better mixed vertically, leading to a more uniform wind speed with height, while stable conditions can result in a sharper increase.

Understanding the wind profile is crucial in various fields, including wind energy, where accurate wind speed estimates at turbine hub height are essential for power generation calculations and turbine design. It is also important in meteorology for forecasting and in civil engineering for assessing wind loads on structures. Mathematical models are often used to describe and predict the wind profile, with common formulations like the logarithmic wind profile being widely applied.