Relative humidity

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Designation (also air humidity) for the proportion of water vapour in the gas mixture of the earth's atmosphere or in rooms. Liquid water such as raindrops, fog droplets, ice or snow crystals, however, are not included. Humidity is one of the many factors in weather or in the long-term weather pattern of the climate. From the free water surfaces (rivers, lakes, oceans), individual water molecules always pass from the water volume into the air volume. Absolute humidity is the gaseous amount of water vapour contained in one cubic metre of air, usually expressed in g/m3. The most commonly used measure, however, is relative humidity (RH), which is the ratio of the actual amount of water vapour in the air to the maximum possible amount, measured in %. However, the air can only absorb a limited amount of water vapour. The warmer the air, the higher this saturation amount: at 40 °Celsius 50 g, at 65 °Celsius 200 g and at 100 °Celsius 600 g. When the...

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Relative humidity

Humidity

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Relative humidity

Humidity

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