Effects of tropical cyclones on large-scale circulation and ocean heat ...
Tropical circulation
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Transcript of Tropical circulation
![Page 1: Tropical circulation](https://reader035.fdocuments.net/reader035/viewer/2022062216/559fe6d41a28abea148b4639/html5/thumbnails/1.jpg)
Climatology-I
Md. Hanif Bhuian
Dept. Of Geography & Environment
Jagannath University
Dhaka, Bangladesh
Topics: Tropical Circulation
Presentation On
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All of activity of Tropical
Circulation become in Tropical zone.
Tropical Circulation
What is Tropical zone ?
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Tropical Zone
30N & 30S
Latitude is area of
Tropical Zone.
Equatorial or tropical
front Introtopical
convergence(ITCZ)
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Region of ITCZ North Introtopical
Convergence (NITC)
Region of N.E. Trade
wind (blow from N sub-
tropical HP to NITC.
South Introtopical
Convergence(SITC)
Region of S.E. Trade
wind(blow from S sub-
tropical HP to SITC.
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Characteristics of Tropical Zone
A)Doldrum(ITCZ)
B)Equatorial Westerlies
C)Trade Wind
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Doldrum(ITCZ)Trough– Belt of Equatorial
low pressure( 5N to 5S)
This Trough is Doldrum.
Variation
northward(NITC) – summer solstices.
-- 21june
southward(SITC) –winter solstices.
-- 22Dec
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Northward (NITC)—summer solstices
sun in vertical(north part)
over the tropic of cancer
21June
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Southward (SITC)—winter solstices
sun in vertical (south part)
over the tropic of Capricorn.
22 Dec
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3 Zones of Doldrum(based on Crowe)
Indo-pacific doldrum(eastern coast of Africa.
Equatorial western (coastal region of Africa).
Western coastal(region of central America) .
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Equatorial Westerlies
Wind flow westerly (West to East).
South-Western monsoon(based on Fohn)
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South-Western Monsoon
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South-Western Monsoon
30-35N latitude over the Indian ocean.
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Trade Wind
Wind flow from sub-
tropical HP to Equatorial
low pressure belt(ITC)
Direction
N.E. direction
-- Northern hemisphere(NITC).
S.E. direction
-- Southern hemisphere(SITC).
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Trade wind help
Sea merchants for sailing their ships
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Deflection of Trade wind
Freels Law – Based on
carioles force rotation of the
Earth.
Trade wind deflected–
Right in the northern
hemisphere
Left in the southern
hemisphere
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Weather Condition of Trade wind
Polar part or Eastern
site – sub-tropical
anticyclone are Dry.
Because of,
Strong atmospheric
stability
Strong inversion of
temperature
Clear sky
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Equator part of Trade wind
Equator part
Humid
Because of,
atmospheric
instability
much precipitation
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Hadley Cell
The Trade wind zone(NITC & SITC) is Hadley cell.
(basis of convective model prepared by Hadley)
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Thanks to all of you…