Mastering Oceanography Chapter 7
Deep ocean currents are driven primarily by ________ .
Density differences
The worldwide effects of El Niño include all the following except :
drought in the U.S. Gulf coastal states.
Sverdrup
unit of flow rate
Upwelling occurs in all the following locations except :
where deep-ocean currents are formed.
Surface ocean currents are driven primarily by ________ and modified by ________.
wind; the Coriolis effect and land
A. Gulf of Alaska B. Indian C. North Atlantic D. South Atlantic E. South Pacific
A
Western intensification causes:
All the above effects are the result of western intensification.
Which of the following is a western boundary current?
Brazil Current
Surface ocean currents are vertical currents in the water column that are density-driven. T or F
F
A Doppler flow meter is a scientific instrument used to measure current flow rates. T or F
T
Downwelling may be the result of winds blowing parallel to a coastline or the convergence of surface currents. True False
T
Dynamic topography can be used to determine current direction and velocity. T or F
T
The West Wind Drift occurs at 60°N around the Arctic Circle. T or F
T
Compared to western boundary currents, eastern boundary currents are:
broad and slow
When a meander from the Gulf Stream pinches off and isolates a body of water within the North Atlantic gyre, the body of water is called a:
cold core ring.
Match the term or person with the appropriate phrase. California Current
cold current, northern hemisphere, temperate latitudes
Match the term or person with the appropriate phrase. Canary Current
cold current, northern hemisphere, temperate latitudes
Match the term or person with the appropriate phrase. West Wind Drift
cold current, polar latitudes, southern hemisphere
Match the term or person with the appropriate phrase. Benguela Current
cold current, southern hemisphere, temperate latitudes
Downwelling can result from __________.
converging surface currents
The densest ocean water is North Atlantic Deep Water. t or f
f
During winter months, monsoon winds over the Indian Ocean:
flow from land to sea and are dry.
Deep-water circulation brings oxygen from the surface to the deep ocean because of:
greater dissolution of oxygen in colder water than warmer water.
Match the term or person with the appropriate phrase. Kuroshio Current
northern hemisphere, temperate latitudes, warm current
Monsoon
seasonal winds that blow northeast
El nino
southern flowing warm off coast Ecuador can cause death of organisms
La nina
surface temperatures fall below normal after El Nino
Deep ocean currents often move cold, dense water away from the poles. t or f
t
All are true of the Antarctic Circumpolar Current except
the Antarctic Circumpolar Current contributes to the development of Antarctic bottom water in the Weddell Sea.
In comparison to wind energy, ocean currents can generate more clean, renewable energy because __________.
the density of water is greater than that of air
The Ekman spiral is caused by:
the wind and Coriolis effect