Specific humidity is the ratio of water vapor

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27836-ma-275_humidity_2011.ppt

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>Specific humidity is the ratio of water vapor to dry air in a particular Specific humidity is the ratio of water vapor to dry air in a particular mass, and is sometimes referred to as humidity ratio. Specific humidity ratio is expressed as a ratio of grams of water vapor, mv, per kilogram of dry air ma. One slide about Specific humidity That ratio is defined as: Specific humidity can be expressed in other ways including: Удельная влажность - масса водяного пара в граммах на килограмм увлажнённого воздуха [г/кг], то есть отношение масс водяного пара и увлажнённого воздуха.

>The mixing ratio is defined as the mass of water  vapor divided by The mixing ratio is defined as the mass of water vapor divided by the mass of dry air. Mixing Ratio -- mixing ratio R – amount of precipitation E – evaporation MR – is a coefficient, that’s why it hasn’t any dimension. Коэффициент увлажнения — отношение годового количества осадков к годовой величине испаряемости для данного ландшафта, является показателем соотношением тепла и влаги.

>Relative humidity       Relative humidity is a term used Relative humidity Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor. It is defined as the ratio of the partial pressure of water vapor in the air-water mixture to the saturated vapor pressure of water at those conditions. f= (e\E)*100% * Относительная влажность (f) – отношение фактического давления водяного пара e к давлению насыщения E над плоской поверхностью чистой воды, выраженное в процентах.

>Absolute Humidity Absolute humidity is  the density of water vapor in the air. Absolute Humidity Absolute humidity is the density of water vapor in the air. It is the mass of water vapor, mw, per cubic meter of total moist air,Vnet: Commonly used unit of absolute humidity is 1 g/m³. Absolute humidity ranges from 0 grams per cubic meter in dry air to 30 grams per cubic meter when the vapor is saturated at 30 °C

>Dew point - is the temperature to which a given parcel of humid air Dew point - is the temperature to which a given parcel of humid air must be cooled, at constant barometric pressure, for water vapor to condense into liquid water. The condensed water is called dew when it forms on a solid surface. The dew point is a saturation temperature. a = 17.271 b = 237.7 °C Dimension - °C, °K, °F