OCE 1001 Chap 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

Which of the following is not an eastern boundary current?

Gulf Stream

Warm core rings and cold core rings are associated with __________.

western boundary currents

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

Compared to an eastern boundary current in a gyre, which of the following statements is true for a western boundary current?

All the above statements are true of western boundary currents.

The actual movement of surface water due to Ekman transport in the Northern Hemisphere is about __________.

45° to the right of wind direction

A. Agulhas Current B. Benguela Current C. California Current D. Canary Current E. West Australian Current

A. Agulhas Current

A. California Current B. Canary Current C. Gulf Stream D. North Atlantic Current E. North Equatorial Current in the Atlantic Ocean

A. California Current

A. Gulf of Alaska B. Indian C. North Atlantic D. South Atlantic E. South Pacific

A. Gulf of Alaska

The arrangement of water masses in the southern Atlantic Ocean from the surface to the bottom is:

Antarctic Intermediate Water, North Atlantic Deep Water, Antarctic Bottom Water.

Which of the following is a western boundary current?

Brazil Current

A. thermohaline circulation B. density-driven circulation C. Antarctic Bottom Water D. Kuroshio Current E. North Atlantic Deep Water

D. Kuroshio Current

Of the following statements about deep-ocean currents, which is/are true?

Deep-ocean currents are initiated by downwelling of cold, dense water near Antarctica and in the North Atlantic Ocean. The volume of water involved in the downward movement of deep-ocean currents is equal to the flow of 100 Amazon-sized rivers. Deep-ocean currents are important regulators of global climate. Deep-ocean currents contain water that is high in oxygen. Deep-ocean circulation is often referred to as thermohaline flow.

A. Australian drought B. decreased fish stock in coastal Peru C. flooding rains in southeastern U.S. D. Peruvian upwelling stops E. strong trade winds

E. strong trade winds

Of the following surface currents, which one(s) flow generally from west to east?

Equatorial Counter Current North Pacific Current West Wind Drift

Of the following locations, where would upwelling be expected to occur?

In areas of offshore winds In areas of diverging surface currents, such as along the equator Where there is a shallowly submerged sea floor obstruction, such as a tablemount Where there is a sharp bend in a coastline

Identify the mismatched pair from the choices below.

Labrador Current, Humboldt Current

The West Wind Drift (Antarctic Circumpolar Current) is a part of which of the following subtropical gyres?

South Atlantic Subtropical Gyre Indian Ocean Subtropical Gyre South Pacific Subtropical Gyre

Of the following gyres, which one(s) flow in a counterclockwise direction?

South Pacific Subtropical Gyre Northern Hemisphere Subpolar Gyres Indian Ocean Subtropical Gyre South Atlantic Subtropical Gyre

The deepest and most dense water mass in the world ocean is formed in the __________________.

Southern Ocean

During a strong El Niño event, the news media might be expected to cover __________.

a tropical cyclone in Hawaii or Tahiti

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

During winter months, monsoon winds over the Indian Ocean:

flow from land to sea and are dry.

Match the term or description with the appropriate phrase: upwelling

movement of water from the bottom to the top of the water column

Match the term or description with the appropriate phrase: Ekman transport

net water movement to the left or right of the direction of the wind

Match the term or person with the appropriate phrase: Gulf Stream

northern hemisphere, temperate latitudes, warm current

Match the term or person with the appropriate phrase: Kuroshio Current

northern hemisphere, temperate latitudes, warm current

An indirect method of measuring ocean current is the use of __________.

radar altimeters

Records indicate that the ocean is warming faster in the Arctic polar regions than elsewhere. If that continues, a possible consequence could be __________.

slowing of deep ocean circulation, resulting in lower oxygen levels in deep water

Sources of deep water in the ocean include all of the following except:

subtropical convergences.

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.

Of the following surface currents, which one(s) flow from south to north?

the Gulf Stream Peru Current Kuroshio Current

In comparison to wind energy, ocean currents can generate more clean, renewable energy because __________.

the density of water is greater than that of air

Deep ocean current movement is also known as __________.

thermohaline flow

In the southern hemisphere, the direction of Ekman transport is always:

to the left of the wind direction.