Presentation typically demonstrate some basics about Introduction, types of Air masses.

1. AIR MASSES
Sourav kumar Sahu
Presented by

2. Introduction
Definition
Types of Air masses
Conclusion

3. INTRODUCTION :-
The climate of any region in the world is largely
determined by observing the characteristics of the
air mass that occupies it.
Weather can cause short term atmospheric changes
but the stable air mass determined the prevailing
weather condition of vast territory.
When two air masses that do not have the same
properties meet, they do not mix. Instead, a
boundary forms that is called FRONT.

4. DEFINITION :-
Air mass is the meteorological term for a
volume of air with a constant temperature and
humidity covering an area.
It varies in size from hundreds to thousands of
miles.
The region over which an air mass forms is
called a source region. This region can be a
land surface or body of water.

5. SOURCE REGION

6. TYPES OF AIR MASSES :-
According to Bergeron classification system the
classification air masses first takes place according to
the source regions from where they originate.
There are four central regions classified according to
their latitude :-
1. Arctic/Antarctic Air mass
2. Polar Air mass
3. Tropical Air mass
4. Equatorial Air mass

7. The amount of moisture in an air mass also plays a
significant role in forming its characteristics , which is
primarily the result of the type of surface over which it
occurs.
There are two types of surfaces have the most significant
influence on moisture levels :-
1. Continental
2. Maritime

8. Six primary types of global Air masses covering the
planet emerge when you combine the source region with
the kind of surface underlying on air mass :-
1. Continental Arctic (cA)/Continental Antarctic(cAA)
2. Continental Polar(cP)
3. Maritime Polar(mP)
4. Continental Tropical(cT)
5. Maritime Tropical(mT)
6. Maritime Equatorial(mE)

9. (GLOBALAIR MASSES)

10. 1. Continental ARCTIC (cA)/CONTINENTALANTARCTIC (cAA) :-
The continental arctic (cA) air mass develops over the ice-
covered regions of the North pole and Greenland.
It mainly takes place over the ice and snow.
This air mass only takes place during the winter when solar
radiation during the day is almost non existent.
The icy condition , combined with a lack of moisture ,
creates very cold and dry atmospheric condition.

11. CONTINENTAL ARCTIC (cA)

12. 2. CONTINENTAL POLAR (cP) :-
The continental polar (cP) Air mass develop over the land
masses of subpolar regions.
They primarily affect areas at high latitude like Canada , the
Northern USA , as well as Northern Asia.
It characterized by cold , dry weather with little cloud cover
and precipitation , especially during the winter.
It can provide a pleasant reprieve from warm weather
during the summer months.

13. CONTINENTAL POLAR (cP)

14. 3. MARITIME POLAR (MP) :-
Maritime polar (mP) Air masses form over the
freezing North Atlantic and Pacific oceans near the
Arctic.
It characterized by cold , moist and unstable weather.
When it originates directly over the water , then air
mass can influence adjacent coastlines.
In the winter , they bring heavy snow and cold

15. MARITIME POLAR (mP)

16. Continental tropical Air masses form approximately 25
degree North and South of the Equator over the dry ,
mostly arid regions of the world.
It mainly occur over deserts , including the Sahara , the
desert of Mexico & the Arab peninsula.
It characterized by hot & dry weather conditions , with
clear skies , hot , low humidity.
Occurs in the summer , rarely in winter.
4. CONTINENTAL TROPICAL(CP) :-

17. CONTINENTAL TROPICAL (cT)

18. 5. MARITIME TROPICAL(MT) :-
Maritime tropical (mT) Air masses mainly occur over the
warm oceans of the tropics and subtropical regions.
They covers vast areas of the South Atlantic , Indian & South
pacific oceans.
It characterized by very hot & humid weather condition.
Responsible for hot , humid summer days across the South &
the East , it also responsible for the majority of the country’s
Thunderstorms.

19. MARITIME TROPICAL (mT)

20. 6. MARITIME EQUATORIAL(ME) :-
Air masses at or near the Equator primarily form over
water , and as a result , are all referred to as Maritime
Equatorial Air masses.
The small portion of the land that it covers consist
mostly of rainforests and not exposed dry land.
It characterized by hot & very humid weather
condition.
It causes high volumes of rainfall throughout the year.

21. MARITIME EQUATORIAL (mE)
(RAINFORESTS)

22. NORTH AMERICAN AIR MASSES

24. CONCLUSION:-
This article clearly illustrated the importance of
the world’s air masses.
They play a crucial role in the formation of the
weather and climate patterns that we attribute to
different regions and countries through out the
year.

25. THANK
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