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Geografie Graad 12 Vraestel 1

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Geografie Graad 12 Vraestel 1 - Klimaat en Weer - Geomorfologie - GIS

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12th Grade










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November 11, 2025
Number of pages
24
Written in
2025/2026
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Class notes
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Lea verster
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Middelbreedte Siklone

Laagdruksel (Sikloon) H
- Warm stygende lug -
- Konvergensie vind plaas. -
- Druk is laagste in die middel. -
- Onstabiel weer toestande -
- Lug beweeg kloksgewys in suidelike halfrond. -

Algemene kenmerke van 'n Middelbreedte sikloon
1. Kom tussen die 30°-60° breedte lyne voor.
2. Beweeg van Wes na Oos (Ooswaarts)
3. Deur Weste winde aangedryf
4. Bestaan uit warm- en koue fronte
5. Baie groot siklone (±1000km deursnee)
6. Beïnvloed SA in die winter
7. Duur tussen 7-14 dae

Toestande nodig vir die ontwikkeling van
Middelbreedtesiklone:
1. Warm tropiese Westewinde ontmoet koue polêre

,Dwarsdeursnee van 'n Middelbreedtesikloon




Weertoestande van 'n Middelbreedtesikloon

, Tropiese Siklone

Algemene kenmerke:
1. Intense laagdruk
2. Ontstaan oor warm tropiese oseane.
3. Oseaantemperatuur moet 27° en hoër wees
om doe intense laagdruk te laat ontwikkel.
4. Ontwikkeling in Oostelike windgordel.
5. Beweeg van Oos na Wes (weswaarts)
6. Tussen 300km-500km deursnee.
7. Volg onvoorspelbare paaie.

Toestande nodig vir die vorming van Tropiese Siklone:

See temperatuur van 27° en meer = Bevorder hoë verdamp
Hoë waterdamp inhoud bevat latente hitte.
Onstabiele atmosfeer = Vir konveksie en die vrylating van
Vorm tussen 5° - 25° N/S = Temperatuur is hoog en corioli
Kalm toestande = Kalm toestande vir die konvergensie van

Stadiums van ontwikkeling van Tropiese Siklone:
R153,33
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