- psychrometric constant
- 溼度计算常数
Atmospheric Sciences (English-Chinese) dictionary. 2014.
psychrometric constant
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Psychrometric constant — The psychrometric constant, gamma = , ralates the partial pressure of water in air to the air temperature. This lets one interpolate actual vapor pressure from paired dry and wet thermometer bulb temperature readings [cite book |last=Allen |first … Wikipedia
Lapse rate — The lapse rate is defined as the rate of decrease with height for an atmospheric variable. The variable involved is temperature unless specified otherwise.[1][2] The terminology arises from the word lapse in the sense of a decrease or decline;… … Wikipedia
Penman equation — The Penman equation describes evaporation ( E ) from an open water surface, and was developed by Howard Penman in 1948. Penman s equation requires daily mean temperature, wind speed, relative humidity, and solar radiation to predict E. Simpler… … Wikipedia
Penman-Monteith — Like the Penman equation, the Penman Monteith equation requires daily mean temperature, wind speed, relative humidity, and solar radiation to predict net evapotranspiration. Other than radiation, these parameter are implicit in the derivation of… … Wikipedia
Psychrometrics — or psychrometry are terms used to describe the field of engineering concerned with the determination of physical and thermodynamic properties of gas vapor mixtures. The term derives from the Greek psuchron (ψυχρόν) (… … Wikipedia
Wet-bulb temperature — The wet bulb temperature is a type of temperature measurement that reflects the physical properties of a system with a mixture of a gas and a vapor, usually air and water vapor. Wet bulb temperature can have several technical meanings:… … Wikipedia
Evaporative cooler — An evaporative cooler, photographed in Rocky Ford, Colorado, used in the drier parts of the American West to provide economical cooling … Wikipedia
Enthalpy–entropy chart — The Mollier Enthalpy Entropy Diagram for water and steam. The dryness fraction , x, gives the fraction by mass of gaseous water in the wet region, the remainder being droplets of liquid. An enthalpy–entropy chart, also known as the h–s chart or… … Wikipedia
Dew point — The 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… … Wikipedia
Hygrometer — Not to be confused with hydrometer. A hygrometer (UK: /haɪˈɡrɒmɪtə/) is an instrument used for measuring the moisture content in the environmental air, or humidity. Most measurement devices usually rely on measurements of some other quantity … Wikipedia
Plot (graphics) — Scatterplot of the eruption interval for Old Faithful (a geyser). A plot is a graphical technique for representing a data set, usually as a graph showing the relationship between two or more variables. The plot can be drawn by hand or by a… … Wikipedia
