Flashcards in Ocean Currents Deck (58)
Define Deep Currents
High density caused by temperature and salinity differences at the surface
What are the three methods to indirectly measure water currents?
Internal density distribution, TOEX/Posidon satellite to determine ocean bulges, Doppler flow meter to transmit low frequency sound signals
What two methods directly measure ocean currents?
A floating device is released and tracked through time, a fixed contraption measures flow through a propeller
How much of the wind's energy is transferred to the ocean surface?
What pattern would surface currents follow if there were not any continents on Earth?
The wind belts
Surface currents occur within and above the _____.
pychnocline (layer of rapidly changing density)
How deep do surface currents exist?
How much of the world's ocean water is affected by surface currents?
What currents are encouraged by the trade winds?
The N or S equatorial currents
What are western boundary currents and what contributes to them?
Currents traveling along the western current of their basin, Coriolis effect
What current flows south on the eastern edge of South America?
What current flows north along the eastern edge of North America?
What current is warm and cold and exist on the southern edge of Alaska?
What current flows North along the western coast of South America?
Which current flows South along the western coast of North America?
What current flows North Across the northern Atlantic and is warm?
N. Atlantic Current
What current flows north up the lower eastern coast of South America and is cold?
The Canary Current flows where and is what type of current?
South off of the coast of Europe and northern coast of Africa, cold
What current flows north off of the southwestern coast of Africa and is cold?
What current flows south on the eastern coast of Africa and is warm?
What warm currents exist in the southern part of the Indian Ocean?
N. Equatorial Current flowing West, E. Equatorial Current flowing East, S. Equatorial Current flowing West
What current flows near the western coast of Australia coming from the Antarctic Circumpolar Current and goes North, and is cold?
W. Australian Current
What current flows south off of western coast of Australia and is warm?
What current flows south near the eastern coast of Australia and is warm?
E. Australian Current
What current flows north off of the coast of Asia and is warm?
What current flows south off of the northern coast of Asia and comes from the Arctic cold waters and is cold?
What is a subpolar Gyre?
currents that rotate opposite the adjacent subtropical gyre
The equatorial, western boundary, prevailing westerly, and eastern boundary currents combine to create a ______.
Who observed that the Arctic Ocean ice moved 20 to 40 degrees to the right of the wind blowing across the surface and on what voyage was he on?
Fridtjof Nansen, Fram