Topics: Tropical Circulation
Md. Hanif Bhuian
Dept. Of Geography & Environment
All of activity of Tropical
Circulation become in Tropical zone.
What is Tropical zone ?
30N & 30S
Latitude is area of
Equatorial or tropical
Region of ITCZ
Region of N.E. Trade
wind (blow from N sub-tropical
HP to NITC.
Region of S.E. Trade
wind(blow from S sub-tropical
HP to SITC.
Characteristics of Tropical Zone
Trough– Belt of Equatorial
low pressure( 5N to 5S)
This Trough is Doldrum.
northward(NITC) – summer solstices.
southward(SITC) –winter solstices.
Northward (NITC)—summer solstices
sun in vertical(north part)
over the tropic of cancer
Southward (SITC)—winter solstices
sun in vertical (south part)
over the tropic of Capricorn.
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) .
Wind flow westerly (West to East).
South-Western monsoon(based on Fohn)