Which of these is generally not an El Niño effect?
(a) A rise in the sea level off the coasts of the American Continents.
(b) An increase in ocean surface temperature in the eastern Pacific.
(c) An increase in rainfall in west coastal countries or states of the American continents.
(d) An often catastrophic decrease in the commercial fisheries of the affected countries.
(e) A decline in the exotic species of fish and other forms of marine life in the affected waters.
Transport of water to the left or right of the wind direction is called __________.
(a) Ekman transport
(b) geostrophic flow
Surface ocean circulation is driven primarily by _______ and modified by ________.
(a) density differences; the Coriolis effect and land
(b) density differences; differences in salinity and temperature
(c) latitude; differences in salinity and land
(d) wind; the Coriolis effect and land
(e) wind; gravity and density
The El Niño weather pattern is associated with __________.
(a) about a 0.5 meter difference in sea surface height between Tahiti and Darwin, Australia
(b) cold, nutrient-rich water close to the sea surface near the coast of Peru
(c) drought and fires in Australia
(d) high pressure sitting over coastal Peru
(e) trade winds blowing east to west
The densest water in ocean currents is the ___________.
(a) warmest and saltiest
(b) coldest and saltiest
(c) warmest and freshest
(d) coldest and freshest
aA. Ekman transport
bC. Drought and fires in Australia
cD. Wind; the Coriolis effect and land
dE. A decline in the exotic species of fish and other forms of marine life in the affected waters.
eB. Coldest and saltiest
5 Multiple Choice Questions
C. Gulf Stream
B. Geostrophic flow
5 True/False Questions
Deep ocean water masses have characteristic temperatures and salinities.
(b) False → B. False
The Canary Current in the northeastern Atlantic Ocean is an example of a __________ current.
(a) warm-water, western boundary
(b) warm-water, eastern boundary
(d) cold-water, western boundary
(e) cold-water, eastern boundary → A. Warm-water, western boundary
The Earth's rotation influences currents by a force (or acceleration, to be correct) known as the
(a) Franklin rotation
(c) gyral nutation
(d) Coriolis effect → A. True
Identify the mismatched pair.
(a) Agulhas Current, West Australia Current
(b) Brazil Current , Benguela Current
(c) Canary Current, Gulf Stream
(d) Kuroshio Current, California Current
(e) Labrador Current, Humboldt Current → C. Gulf Stream
Compared to an eastern boundary current in a gyre, which of the following statements is true for a
western boundary current?
(a) deeper current
(b) increased current velocity
(c) intensification in subtropical latitudes
(d) narrower current
(e) All of the above statements are true of western boundary currents → B. Eastern boundary currents are broad and slow