Humidity geography UPPSC| Moisture Vs Humidity UPSC | Moisture and Precipitation UPSC | Climatology | UPPSC

 Moisture: 

Moisture is a general term that is used for the presence of water content in any substance like soil, atmosphere, food grains, etc.

For example, if the water content is present in the soil, we say moist soil.

Humidity:

Water vapor present in the air is known as humidity. Moisture in the air at any time is known as humidity. 

In geography, it is good to say Humid air, not moist air.

So humidity is an appropriate geographical term used that has the same meaning as moist air.

Sources of humidity in the atmosphere:

Evaporation, transpiration, perspiration, and sublimation are some of the important processes that add humidity to the atmosphere.

Through the process of evaporation, water vapor from water bodies and soil is added to the atmosphere. The rate of the evaporation process depends on temperature, winds, and relative humidity.

Moisture is added to the atmosphere by living organisms such as vegetation through the process of transpiration.

Through the process of perspiration, moisture from people and animals is released into the atmosphere.

Sublimation is the process in which moisture is added directly to the air from snow.

Humidity in the atmosphere is expressed quantitatively in different ways. In general, there are two ways to express the humidity in the atmosphere namely absolute humidity and relative humidity.

Absolute Humidity:

The actual amount of water vapor present in the atmosphere is known as absolute humidity. It tells us the amount of water( in grams) per unit volume of air. It can be expressed in grams pers per cubic meter.

As the amount of water holding capacity of air depends entirely on its temperature, so absolute humidity differs from place to place. The water-holding capacity of air get increases with the increase in temperature.

Relative Humidity:

The percentage of moisture present in the atmosphere as compared to its full capacity at a given temperature is known as relative humidity.

The air containing moisture to its full capacity at a given temperature is known as saturated air. This means air can not hold more water vapor at the given pressure and temperature. At this moment, relative humidity will be 100 %.

The temperature at which saturation occurs in a given sample of air is known as the dew point.

Dew Point:

• The temperature at which saturation of air occurs at the given time is called the dew point of that air.
• The dew point of air gets an increase when temperature increase and pressure decrease; because the air molecule gets distanced while heating and is able to hold more water vapor.
• The dew point of air gets decreases when temperature decrease and pressure increases; because air molecules get compressed means less capacity to hold water.

You may like also:

• Precipitation UPSC geography 
• Humidity geography
• भूगोल में आर्द्रता 

• Tweet
• Share
• Share
• Share
• Share

Related Post