Humidity
71humidity chamber — A test chamber for simulating tropical and subtropical conditions …
72Relative humidity — is a measurement of the amount of water vapor that exists in a gaseous mixture of air and water. Estimating relative humidity The relative humidity of an air water vapor mixture can be estimated if both the temperature ( T ) and the dew point… …
73Critical relative humidity — The critical relative humidity (CRH) of a salt is defined as the relative humidity of the surrounding atmosphere (at a certain temperature) at which the material begins to absorb moisture from the atmosphere and below which it will not absorb… …
74specific humidity — the ratio of the mass of water vapor in air to the total mass of the mixture of air and water vapor. Cf. mixing ratio, absolute humidity, dew point, relative humidity. * * * ▪ meteorology mass of water vapour in a unit mass of moist air,… …
75relative humidity — The proportion of actual moisture in the air to the maximum amount possible at a specified temperature. It is stated as a percentage, with 100% being air fully saturated with water vapor. Control very important in art conservation because when …
76absolute humidity — noun : the amount of vapor actually present in the air usually expressed in grams per cubic meter or grains per cubic foot * * * the mass of water vapor present in a unit volume of moist air. Cf. dew point, mixing ratio, relative humidity,… …
77temperature-humidity index — /tem peuhr euh cheuhr hyooh mid i tee/ or, often, / yooh , preuh , peuhr cheuhr , choor / a number representing an estimate of the effect of temperature and moisture on humans, computed by multiplying the sum of dry bulb and wet bulb temperature… …
78relative humidity — the amount of water vapor in the air, expressed as a percentage of the maximum amount that the air could hold at the given temperature; the ratio of the actual water vapor pressure to the saturation vapor pressure. Abbr.: RH, rh Also called… …
79absolute humidity — noun a) The mass of water vapour in a given volume of air b) In a system of moist air, the ratio of the mass of water vapor present to the volume occupied by the mixture, that is, the density of the …
80Microwave humidity sounder — The Microwave Humidity Sounder (MHS) is an instrument launched on NOAA s POES satellite series starting with NOAA 18 launched in May 2005 and European Space Agency s MetOp series starting with MetOp A launched in October 2006. It is a five… …
