![]() Journal of Applied Meteorology, 35(4), 601-609. ![]() Improved Magnus form approximation of saturation vapor pressure. Versuche über die Spannkräfte des Wasserdampfs. Bulletin of the American Meteorological Society, 86(2), 225-233. The relationship between relative humidity and the dewpoint temperature in moist air: A simple conversion and applications. If the alternative definition of Relative Humidity based on the water vapor mixing ratio is used, then this equation may report a slight error of up to ~3% of the dew point depression. This formula assumes Relative Humidity is defined as the ratio of water vapor pressure (e) to the equilibrium vapor pressure over a plane of water ("saturation" vapor pressure (e s)) converted to a percent. There are two different definitions of Relative Humidity. Constants A 1 and B 1 used in this equation were determined by Alduchov and Eskridge (1996). While there are many ways in which to estimate the Dew Point Temperature, Lawrence (2005) derived this formula based on the empirical formula by Magnus (1844) along with a definition of Relative Humidity. The Dew Point Temperature is the temperature air needs to cool to cause the water vapor already in the air to condense out as dew on surfaces. Calculate your University of Miami grade point average (GPA) using our University of Miami GPA calculator and stay on top of your college grades. This Dew Point Temperature equation computes the Dew Point Temperature given the Relative Humidity and ambient temperature. However, this can be automatically converted to other temperature units via the pull-down menu. INSTRUCTIONS: Choose units and enter the following:ĭew Point Temperature (DP): The calculator returns the dew point temperature in degrees Celsius (C). The Dew Point Temperature calculator computes the dew point (DP) based on the relative humidity (RH) and ambient temperature (t).
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