The document introduces atmospheric circulation, which is driven by differences in insolation and the Earth's rotation, resulting in a global pattern of winds and pressure belts. It details three models of atmospheric circulation: Hadley cell, Ferrel cell, and Polar cell, each affecting weather patterns and climate across various latitudes. Additionally, it discusses seasonal shifts in circulation and phenomena like monsoons, emphasizing the importance of atmospheric circulation in distributing heat on Earth.

1. Global Circulation of the Atmosphere
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2. Submitted To:
Md. Anarul Haque Mondol
Lecturer
Department of Geography &
Environment
Jahangirnagar University
Submitted By: Group: I
Member Roll
Shahorima Jannati 633
Injamamul Haque 649
Khalilur Rahman 663
Abdul Alim 676
Ayesha Akter 2258
Jahangirnagar
University
Savar, Dhaka- 1342
Course: 201
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3. Contents
 Atmospheric Circulation
 Spheres of Atmosphere
 Three model of Atmospheric Circulation
1. Hadley Cell
2.Ferrel Cell
3. Polar Cell
 The Patterns in Global Air Circulation
 Season
 Monsoon
 Day and Night(Sea breeze and Land breeze)
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4. The purpose of this presentation is to introduce the topic of
atmospheric circulation.
Main concepts
 Atmospheric circulation is a response to differences in insolation between low
and high latitudes.
 There is a transfer of energy from low to high latitudes.
 A global pattern of surface winds and pressure belts results from this
circulation.
 There is a seasonal shift of the surface wind and pressure belts.
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5.  What is Atmospheric Circulation?
The circulation of wind in the
atmosphere is driven by the rotation
of the earth and the incoming energy
from the sun. Wind circulates in each
hemisphere in three distinct cells
which help transport energy and heat
from the equator to the poles.
Cyclone
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6. Troposphere
 extends to 16-18 km
above the tropics but
<10 km above the
poles;
contains ~80% of
atmosphere’s mass; and
runs the hydrological
cycle because
tropospheric temperatures
decrease with height
Average temperature, °C
Troposphere
Tropopause
Stratosphere
Mesosphere
Thermo-sphere
Average atmospheric
temperature
Stratopause
There is a hole in the
Ozone layer right
above Antarctica
Height,abovemeansealevel(km)
Spheres of Atmosphere
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7. Three model of Atmospheric Circulation
Hadley Cell
 Ferrel Cell
 Polar Cell
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8. Hadley cell
The Hadley cell, named after George Hadley,
is a global scale tropical atmospheric
circulation that features air rising near the
equator, flowing poleward at 10–15
kilometers above the surface, descending in
the subtropics, and then returning
equatorward near the surface. This
circulation creates the trade winds, tropical
rain-belts and hurricanes, subtropical deserts
and the jet streams.
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9. The Ferrel cell occurs between 30 and 60
degrees north and south. The Ferrel cell is
dependent for its existence upon the
Hadley cell and the Polar cell. It comes
about as a result of the high and low
pressure areas of the mid-latitudes. For
this reason it is sometimes known as the
"zone of mixing." In this cell at higher
levels the wind blows equatorward and in
a westerly direction and pole wards and in
an easterly direction on the surface.
Ferrel cell
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10. This cell occurs at 60 degrees north and south.
The air has been warmed up and rises upwards,
creating a zone of low pressure. Though cool
and dry relative to equatorial air, air masses are
still sufficiently warm and moist to undergo
convection. When the air reaches the polar
areas, it has cooled considerably, and descends
as a cold, dry high pressure area, moving away
from the pole along the surface.
Polar Cell
Polar cell
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11. Interaction with each other cells
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12. Describe atmospheric circulation with picture
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13. The Patterns in Global Air Circulation
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14. Trade Winds
Trade winds blow in a belt
lying between 5N-30S in
the southern hemisphere.
Polar Easterlies
The polar easterlies
blow from the polar
high pressure area
to the temperature
low pressure area.
Westerlies
The westerlies winds blow across
latitudes 35-60 of both hemisphere.
Polar
Easterlies
Polar
Easterlies
Trade winds, Westerlies, Polar Easterlies
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15. Atmospheric Circulation is difference in Seasonally
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16. Monsoon
Monsoon is traditionally defined as a
seasonal reversing wind accompanied by
corresponding changes in precipitation,
but is now used to describe seasonal
changes in atmospheric circulation and
precipitation associated with the
asymmetric heating of land and sea.
Rain
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17. Example
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19. Conclusion
Atmospheric circulation is the large-scale movement of air by which heat
is distributed on the surface of the Earth. The circulation of wind in the
atmosphere is driven by the rotation of the earth and the incoming energy
from the sun. Without atmospheric circulation earth is static.
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20. • www.google.com
• www.wikipedia.com
• www.sciencedaily.com/terms/atmospheric_circulation.htm
• https://www.youtube.com/watch?v=WXuGYSM2D8k
• www.dictionary.com
• www.britannica.com
• Class Lecture
Further Read
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