Ocean_Circulation by hmharky

VIEWS: 60 PAGES: 15

									Components of the Climate System

• Atmosphere • Ocean

• Biosphere • Geosphere

Image from NASA

Atmosphere & Ocean Circulation
• Atmospheric Circulation
– Depends on density

• Ocean Surface Circulation
– Depends on the wind

• Deep Ocean Circulation
– Depends on density

Why is Ocean Circulation Important?
• Transport ~ 20% of latitudinal heat – Equator to poles • Transport nutrients and organisms • Influences weather and climate • Influences commerce

Temperature Structure of Ocean

thermocline

Ocean Circulation

Wind driven surfacecurrents Wind-drive ocean surface currents

• How fast? A few miles/hr (Gulf Stream off of Miami = 4.5 mph) • How much? Total water in ocean surface circulation = about 100
Amazon Rivers (20 million m3/s).

Atmosphere & Ocean Circulation
• Atmospheric Circulation
– Depends on density

• Ocean Surface Circulation
– Depends on the wind

• Deep Ocean Circulation
– Depends on density

Sea Surface Temperature

http://www.ldeo.columbia.edu/dees/ees/climate/slides/sst_march.gif

Ocean Salinity

http://www.ldeo.columbia.edu/dees/ees/climate/slides/sal_march.gif •http://ingrid.ldgo.columbia.edu/

Temperature-Salinity (density) Diagram

Thermohaline Circulation
North Atlantic Deep Water (NADW

15 million m3 of near surface water descend into the deep ocean each se

Thermohaline Circulation - The Ocean Conveyor

Equatorial to polar heat transport and water flow

Ocean – Atmosphere Circulation

UNEQUAL HEATING OF EARTH

BUT – Outgoing solar radiation is not as uneven


								
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