relative-to-specific-humidity.md

Relative to specific humidity

Formula which converts relative to specific humidity

1. $$ \large{RH_{norm} = RH / 100} $$

2. $$ \large{P_s = temperatureToSaturationVaporPressure(t)} $$

3. $$ \large{HumidityRatio_{saturated} = \frac{M_{ratio} * P_s}{P_a - P_s}} $$

4. $$ \large{\omega = \frac{1000 * RH_{norm} * HumidityRatio_{saturated}}{(1+\frac{(1 - RH_{norm}) * HumidityRatio_{saturated}}{M_{ratio}})}} $$

where:

• $RH$ - relative humidity [%]
• $t$ - temperature [°C]
• $M_{ratio}$ - molar mass ratio = 0.6219736437801877
• $P_a$ - atmospheric pressure $[Pa]$