Ocean Circulation (Grade 10 NSC Matric Geography): Flashcards
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Ocean currents
Ocean currents
Large-scale water movements from one ocean part to another
Surface currents cause
Surface currents cause
Wind and Earth's rotation
Deep-water currents cause
Deep-water currents cause
Differences in salt content and temperature
Agulhas current
Agulhas current
Warm current along east coast of SA, flows southwards
Benguela current
Benguela current
Cold current along west coast of SA, flows northwards
Gyres
Gyres
Large circular patterns formed by surface ocean currents
Gyre direction N vs S hemisphere
Gyre direction N vs S hemisphere
Clockwise in north, anti-clockwise in south
Cold currents & fishing
Cold currents & fishing
Contain more oxygen & nutrients, support phytoplankton
Mixing zones
Mixing zones
Where cold & warm currents meet, rich in plankton
Warm currents & tourism
Warm currents & tourism
Areas with warm currents more popular for tourists