36. Compared to an eastern boundary current in a gyre, which of the following st

Question

36. 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

37. The California Current is an

a. Eastern boundary current

b. Western boundary current

38. Equatorial currents are driven by

a. Coriolis force

b. Density

c. Ekman transport

d. Trade winds

e. Westerlies

39. La Nina is observed after every El Nino event.

a. True

b. False

40. The El Nino-Southern Oscillation can be best described as:

a. Relative changes between two different atmospheric pressure systems.

b. The relationship between sea surface temperature and atmospheric pressure.

c. Tidal differences between coastal Peru and Indonesia.

d. Variation in wind speed over the Pacific Ocean.

e. Wind speed and wind direction differences along the equator.

Explanation / Answer

36) All of the above statements are true of western boundary currents (Western boundary currents are warm, deep, narrow, and fast flowing currents that are formed on the west side of ocean basins due to western intensification.)

37) Eastern boundary current (The California Current moves south along the western coast of North America, beginning off southern British Columbia, flowing southward past Washington, Oregon and California, and ending off southern Baja California).

38) Trade winds (On the equator, the South Equatorial Current is drivendirectly by the trade winds which blow from east to west.)

39) True (La Niña, which occurs when the trade winds blow unusually hard and the sea temperature become colder than normal. El Niño and La Niña are the warm and cold phases of an oscillation)

40) Relative changes between two different atmospheric pressure systems. (The El Niño-Southern Oscillation (ENSO) is a naturally occurring phenomenon that involves fluctuating ocean temperatures in the equatorial Pacific. )

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