Atmospheric Moisture in Physical Geography
COURSE NAME: PHYSICAL GEOGRAPHY (Climatology and
Oceanography)
COURSE CODE: EDU146
DEPARTMENT OF EDUCATION (GEOGRAPHY)
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Moisture in the atmosphere,
in the form of water vapor, liquid water, and ice, controls most aspects
of our weather and climate. Atmospheric moisture is expressed as clouds, precipitation, storms,
weather fronts, and other phenomena.
Humidity
of the air refers to the content of water vapour present in the air at a particular time and
place.
On the other hand, water vapour is the gaseous form of water.
Water vapour represents 2
per cent of the total composition of the atmosphere but this percentage
varies both spatially and temporally as it ranges from zero to 5 per cent.
Continued
Nearly 50 per cent of the total atmospheric vapour is concentrated in
the lower atmosphere upto the height of 2000 meters.
It may be mentioned that water occurs in three states like as solid (e.g.
ice, snow and frost), as liquid (e.g. water), as gaseous from (e.g.
vapour).
The presence of water vapour in the atmosphere is a vital factor for
weather conditions of a particular region.
The nature and amount of a precipitation, the amount of loss of heat
through radiation from the earth surface, surface temperature, latent
heat of the atmosphere, stability and instability of air masses etc.
depend on the amount of water vapour present in the atmosphere.
The atmospheric water is derived through evaporation of water from
oceans and seas, terrestrial lakes, land water bodies, river etc.
Description
The process of transformation of liquid (water) into gaseous form
is called
evaporation.
The amount and
intensity
of evaporation depend on
aridity,
temperature
and
velocity
of
winds.
The higher the aridity,
temperature and velocity of winds, the higher the rate and amount
of evaporation because dry air with high temperature is capable of
retaining more moisture (vapour) as dry air requires more time and
moisture to become saturated.
There is more evaporation from the oceans than from the lands.
There is maximum evaporation from the
lands
between
10°N&S
latitudes,
whereas maximum evaporation occur on
oceans
between
10°-20°
both side of the equator.
Atmospheric moisture, in the form of water vapor, liquid water, and ice, plays a crucial role in shaping weather and climate. This course delves into the dynamics of atmospheric moisture, including its distribution, effects on weather patterns, and impact on various climatic factors such as precipitation and heat transfer. Through the study of evaporation, humidity, and the water cycle, students gain a comprehensive understanding of how moisture influences our environment.
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Presentation Transcript
COURSE NAME: PHYSICAL GEOGRAPHY (Climatology and Oceanography) COURSE CODE: EDU146 DEPARTMENT OF EDUCATION (GEOGRAPHY)
ATMOSPHERIC MOISTURE ATMOSPHERIC MOISTURE Moisture in the atmosphere, in the form of water vapor, liquid water, and ice, controls most aspects of our weather and climate. Atmospheric moisture is expressed as clouds, precipitation, storms, weather fronts, and other phenomena. Humidity of the air refers to the content of water vapour present in the air at a particular time and place. On the other hand, water vapour is the gaseous form of water. Water vapour represents 2 per cent of the total composition of the atmosphere but this percentage varies both spatially and temporally as it ranges from zero to 5 per cent.
Continued Nearly 50 per cent of the total atmospheric vapour is concentrated in the lower atmosphere upto the height of 2000 meters. It may be mentioned that water occurs in three states like as solid (e.g. ice, snow and frost), as liquid (e.g. water), as gaseous from (e.g. vapour). The presence of water vapour in the atmosphere is a vital factor for weather conditions of a particular region. The nature and amount of a precipitation, the amount of loss of heat through radiation from the earth surface, surface temperature, latent heat of the atmosphere, stability and instability of air masses etc. depend on the amount of water vapour present in the atmosphere. The atmospheric water is derived through evaporation of water from oceans and seas, terrestrial lakes, land water bodies, river etc. Continued
Description The process of transformation of liquid (water) into gaseous form is called evaporation. The amount and intensity of evaporation depend on aridity, temperatureand velocity of winds. The higher the aridity, temperature and velocity of winds, the higher the rate and amount of evaporation because dry air with high temperature is capable of retaining more moisture (vapour) as dry air requires more time and moisture to become saturated. There is more evaporation from the oceans than from the lands. There is maximum evaporation from the lands between 10 N&S latitudes, whereas maximum evaporation occur on oceans between 10 -20 both side of the equator. Description
