Absolute humidity calculation formula

The absolute humidity calculation formula is introduced as follows:

The calculation formula of absolute humidity is ρ w = e/rw× t = m/v.

The absolute humidity of air refers to the weight of water vapor contained in wet air per cubic meter.

1, the definition of absolute humidity

Absolute humidity refers to the mass of water vapor contained in a certain volume of air, usually expressed in grams per cubic meter. The maximum absolute humidity is the highest humidity in saturated state, that is, the air already contains the largest amount of water vapor, and no more water vapor can be dissolved.

Absolute humidity is an important parameter in meteorology, which is of great significance to weather forecast, climate research and air pollution control.

2. Calculation of absolute humidity

The calculation formula of absolute humidity is ρ w = e/rw× t = m/v.

Where e stands for vapor pressure in Pascal (Pa). Rw is the gas constant of water, and its value is equal to 461.52j/(kg k), which is a constant used to calculate the molar mass of water vapor. T is the temperature in kelvin (k).

M is the mass of water dissolved in air, and the unit is kilograms (kg). V is the volume of air in cubic meters (m? )。

Use of absolute humidity

1, Meteorology and Hydrology

Humidity is a key parameter in meteorology and hydrology, especially when it rains. Humidity plays a decisive role in the formation of different climatic zones and plays a vital role in the water cycle. Relative humidity is commonly used in weather forecast, which can reflect the possibility of rain and fog.

2. Medicine

In the medical field, air humidity is closely related to human respiration. Under certain humidity, oxygen enters the blood more easily through alveoli. The human body feels most comfortable in an environment with humidity of 45%~55%. Too low or too high humidity will have adverse effects on human body, such as stimulating skin and mucous membrane and affecting body temperature regulation.

3. Biology

In biology, especially in ecology, air humidity is a crucial factor. It determines the composition of an ecosystem. Humidity affects the opening and closing of stomata on plant leaves and the respiration of plants. For some animals, such as snails, oxygen can only be absorbed when the skin has a certain humidity. Therefore, humidity is of great significance in the biological field.