OCE Exam 2 Chapter 7

Western intensification causes: a steeper slope of surface water in the western section of the gyre as compared to the eastern section of the gyre. very swift western boundary currents. the center of the gyre to be shift to the west. a large volume of water to flow within western boundary currents .All the above effects are the result of western intensification.

All of the above

Of the following methods, which are indirect methods for measuring currents? Choose all that apply. Radio-transmitting float Doppler flow meter Propeller flow meter Pressure gradients Dynamic topography

Doppler flow meter Pressure gradients Dynamic topography

Which method would be most appropriate for directly measuring the flow rate of the Gulf Stream? Drift bottles Radar altimeter Doppler flow meter Radioactive tracers Argo floats

Drift bottles

Which swift-flowing surface current in a major subtropical gyre transports a large volume of warm water from the equator toward the mid-latitudes? West Australian Current North Equatorial Current Kuroshio Current California Current Benguela Current

Kuroshio Current

Which of the following is a direct method for measuring surface currents? Radio altimeters Pressure gradients Dynamic topography maps Propeller flow meter

Propeller flow meter

Which of the following methods are used to measure ocean surface currents directly? Anchored buoys Doppler flow meters Pressure gradients Radio-transmitting float bottles Radar altimeters

Radio- transmitting float bottles

What depth does Argo floats collect data? 5,000 meters 6,000 meters 3,000 meters Upper 2,000 meters 4,000 meters

Upper 2,000 meters

Deep ocean currents are driven primarily by ________ . latitude Earth's rotation bathymetry density differences wind

density differences

Which type of current flow moves in a circular path around a subtropical convergence, reflecting Ekman transport, gravity, and the Coriolis effect? density-driven circulation thermohaline circulation Langmuir circulation geostrophic circulation counter-current circulation

geostrophic circulation

Ocean surface currents transfer about ________ of the total amount of heat from the tropics to the poles. three-fourths two-thirds one-half one-third one-fourth

one-third

The Ekman spiral is caused by: the wind and gravity .pressure gradients. the wind and the Coriolis effect .the pycnocline. density differences in the water column.

the wind and the Coriolis effect

Equatorial currents are driven by the: trade winds. Coriolis force. density. Ekman transport .westerlies.

trade winds

Surface ocean currents are driven primarily by ________ and modified by ________. density differences; differences in salinity and temperature wind; the Coriolis effect and land latitude; differences in salinity and land density differences; the Coriolis effect and land wind; gravity and density

wind; the Coriolis effect and land