Compute absolute humidity (g/m3) from temperature and relative humidity.
由气温与相对湿度,按经验式计算单位体积空气中的水蒸气质量(g/m³)。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Absolute humidity | AH = e·M_w/(R·T) | Ideal gas law |
| Saturation vapor pressure | e_s = 6.112·exp(17.62T/(243.12+T)) | Magnus formula |
| From RH | e = RH/100 · e_s(T) | WMO No.8 |
| Unit conversion | 1 g/m³ ≈ 1.6 hPa at 25 °C | Meteorological tables |
| Dew point link | AH ↔ e_s(Td) | Stull 2011 |
| Accuracy | <0.4% error −45–60 °C | Lawrence 2005 |