What Is Relative Humidity Over Ice?
How close the air is to saturation for ice instead of liquid water. Below freezing, air can be saturated for ice while still unsaturated for water. In technical terms: RHi = e / e_si(T), where e_si is the saturation vapor pressure over a plane ice surface; RHi exceeds RH over water below 0 °C.
Also called: RHi
Relative Humidity Over Ice In Plain English
How close the air is to saturation for ice instead of liquid water. Below freezing, air can be saturated for ice while still unsaturated for water.
The Technical Definition
RHi = e / e_si(T), where e_si is the saturation vapor pressure over a plane ice surface; RHi exceeds RH over water below 0 °C. NCEP model RH is referenced to ice below −20 °C.
Lessons That Use Relative Humidity Over Ice
- Halos, Sun Dogs, Pillars And Fogbows Unit 17: Strange And Overlooked Weather
