specific humidity


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specific humidity

[spə′sif·ik hyü′mid·əd·ē]
(meteorology)
In a system of moist air, the (dimensionless) ratio of the mass of water vapor to the total mass of the system.

specific humidity

The weight of water vapor per unit weight of moist air (e.g., grams of water vapor per kilogram of air).
References in periodicals archive ?
The advective flux of specific humidity (g x [kg.sup.-1]m x [s.sup.-1]) was calculated for the zonal direction (u x [DELTA]q|[sub.x]) and for the meridional direction (u x [DELTA]q|[sub.y]), where u and v are the horizontal wind speeds in the respective directions and [DELTA]q|[sub.x] and [DELTA]q|[sub.y] are the horizontal humidity gradients in the respective directions.
State equation for the specific humidity of the thermal space:
The interpretation of the absolutely unstable regime III is that for very large negative specific humidity gradients the mean virtual potential temperature will decrease with height.
Figure 8 shows the wind profile with a height of less than 2 km from the ground, while Figure 9 presents the potential temperature and specific humidity profiles with a height less than 5 km from the ground, at 12:00 on August 12.
Differences between each model are more apparent in air temperature and specific humidity. RAMS exhibits a significant cool bias of over 1 K, with COAMPS also showing a cool bias but to a much lesser extent.
The seasonal composites of 300 mb geopotential height, 850 mb geopotential height and specific humidity, and CAPE are shown in Figures 5-8.
Only two models ranked highest for more than one variable: Model F for precipitation and specific humidity, and Model C for winds and moisture flux.
At the outset, four meteorological parameters of level "A" (atmospheric temperature, geopotential height, u-wind, and v-wind) and two parameters of level B (specific humidity and pressure vertical velocity (PVV) ([omega])) are considered at eight pressure levels (1000, 925, 850, 700, 600, 500, 400, and 300 mb) during the four times a day (00, 06, 12, and 18 GMT).
This evaluation was carried out using a multiple linear regression of the hourly chilled water consumption ([Q.sub.CHW]) as a function of the outdoor dry bulb temperature, outdoor specific humidity, lighting and receptacles use, and occupancy, as follows:
The ratio of the specific humidity between R1 and R2 was compared to check the condition of the atmospheric environment.
The proportionality between specific humidity ratio [~.[omega]] and specific humidity ratio on a molal basis is given by
The first step is to provide the analytic background specific humidity profile: