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Tropical circulation

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Hanif Bhuian
Hanif Bhuian

This presentation discusses tropical circulation patterns and zones. It describes that the tropical zone exists between 30 degrees north and south latitude, and is characterized by the Intertropical Convergence Zone (ITCZ). The ITCZ varies northward during the northern hemisphere summer and southward during the southern hemisphere summer. Other features of the tropical zone include the doldrums belt along the ITCZ, equatorial westerly winds, and northeast and southeast trade winds that blow from the subtropical high pressure zones towards the ITCZ. The trade winds help sailors and are deflected to the right in the northern hemisphere and left in the southern hemisphere due to Coriolis force.

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Presentation On Climatology-I Topics: Tropical Circulation Md. Hanif Bhuian Dept. Of Geography & Environment Jagannath University Dhaka, Bangladesh
Tropical circulation
Tropical Circulation All of activity of Tropical Circulation become in Tropical zone. What is Tropical zone ?
Tropical Zone 30N & 30S Latitude is area of Tropical Zone. Equatorial or tropical front Introtopical convergence(ITCZ)
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.
Characteristics of Tropical Zone A)Doldrum(ITCZ) B)Equatorial Westerlies C)Trade Wind
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
Northward (NITC)summer solstices 21June sun in vertical(north part) over the tropic of cancer
Southward (SITC)winter solstices 22 Dec 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) .
Equatorial Westerlies Wind flow westerly (West to East). South-Western monsoon(based on Fohn)
South-Western Monsoon
South-Western Monsoon 30-35N latitude over the Indian ocean.
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).
Trade wind help Sea merchants for sailing their ships
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
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
Equator part of Trade wind Equator part Humid Because of, atmospheric instability much precipitation
Hadley Cell The Trade wind zone(NITC & SITC) is Hadley cell. (basis of convective model prepared by Hadley)
Tropical circulation
Thanks to all of you

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Tropical circulation

  • 1. Presentation On Climatology-I Topics: Tropical Circulation Md. Hanif Bhuian Dept. Of Geography & Environment Jagannath University Dhaka, Bangladesh
  • 3. Tropical Circulation All of activity of Tropical Circulation become in Tropical zone. What is Tropical zone ?
  • 4. Tropical Zone 30N & 30S Latitude is area of Tropical Zone. Equatorial or tropical front Introtopical convergence(ITCZ)
  • 5. 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.
  • 6. Characteristics of Tropical Zone A)Doldrum(ITCZ) B)Equatorial Westerlies C)Trade Wind
  • 7. 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
  • 8. Northward (NITC)summer solstices 21June sun in vertical(north part) over the tropic of cancer
  • 9. Southward (SITC)winter solstices 22 Dec sun in vertical (south part) over the tropic of Capricorn.
  • 10. 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) .
  • 11. Equatorial Westerlies Wind flow westerly (West to East). South-Western monsoon(based on Fohn)
  • 13. South-Western Monsoon 30-35N latitude over the Indian ocean.
  • 14. 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).
  • 15. Trade wind help Sea merchants for sailing their ships
  • 16. 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
  • 17. 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
  • 18. Equator part of Trade wind Equator part Humid Because of, atmospheric instability much precipitation
  • 19. Hadley Cell The Trade wind zone(NITC & SITC) is Hadley cell. (basis of convective model prepared by Hadley)
  • 21. Thanks to all of you