Thermal currents

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Under thermal terms, we mean vertical air movements in the atmosphere created by the difference in temperature, that is, the areas of rising or falling air. This name is commonly used for rising currents used in gliding or gliding.

The emergence of rising currents can occur in several different ways - depending on meteorological conditions and terrain. In Poland, the most common term is the term worked out. a sail (which does not belong to thermal currents).

The thermic worked out is called warming up warm air, which was created by the heating of the area under the influence of sunlight. The surface of the earth is very eager to radiate heat by giving it the air above it and heating it against the air masses above. The warm air at some point breaks off from the ground layer and in the form of a "bubble" begins to wander upward. Gliders determine the area of ​​ascending air as "chimneys". Often the occurrence of the heat is accompanied by clouds of the Cumulus type, called beautiful clouds. Ascendant warm air adiabatically expands along with the height, thus decreasing its temperature. When this temperature falls to the dew point, condensation occurs in the water vapor, resulting in clouds.

The sails are called elevation areas, which are caused by obstacles (mountain slopes, dunes, or even longer buildings) that run across the wind direction. Often these are mixed sail-thermal wears, but the classic sail form is also produced in the absence of sunlight (ie absence of heat).

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