Oceanography unit 7

Which of the following is not a source of deep water in the ocean? A:Southern subpolar latitudes B: Northern subpolar latitudes C: Subtropical convergences D:Arctic convergence E: Antarctic convergence

C:Subtropical convergences

Which of the following currents contributes to the south western United States being arid? A:Brazil current B: California current C: Gulf stream D: North Atlantic current E: North equatorial current

California current

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

Converging surface waters are areas of ________ and ________ productivity.

Downwelling; low

Which of the following is the only current that completely circumscribes earth? A: Antarctic circumpolar B: Benguela C: Malvinas D: South Australian E: South Equatorial

A: Antarctic Circumpolar

The California current is an example of which of the following types of currents? A: Eastern boundary current B:equatorial counter current C: Northern boundary current D:southern boundary current E: Western boundary current

A: Eastern boundary current.

Which of the following statements is true of surface ocean currents? A: Surface currents concentrate warm water in the center of the gyre at mid latitudes. B: Surface currents form circular patterns in the major ocean basins called "gyres". C:Surface currents occur within and below the pycnocline. D: Surface currents transport cold water toward the poles. E: Surface currents transport warm water toward the equator.

B: Surface currents form circular patterns in the major ocean basins called "gyres".

Compared to western boundary currents, eastern boundary currents are_.

Broad and Slow

Which of the following currents contributes to the south eastern United States being humid? A: Brazil current B:California current C:Gulf stream D: North Atlantic Current E: North equatorial current

C: Gulf Stream

During winter months, monsoon winds over the Indian Ocean_.

Flow from land to sea and are dry.

Which type of current flow moves in a circular path around a subtropical convergence, reflecting Ekman transport, gravity, and the Coriolis effect?

Geostrophic circulation

Geostrophic circulation within a gyre driven by_.

Gravity and the Coriolis effect

Compared to Antarctic Bottom Water, North Atlantic Deep Water is_.

Higher in salinity

Warm currents flowing ________ on the ________ sides of continents produce warm, humid conditions.

Poleward; eastern

Coastal upwelling along the coast of Chile is a result of winds from the _ turning towards the _ due to Ekman transport.

South; left

The El Nino southern oscillation can best be described as_.

The relationship between surface temp and changing atmospheric pressure.

The Ekman spiral is caused by_.

The wind and the Coriolis effect.

In the southern hemisphere, the direction of Ekman transport is always_.

To the left of the wind direction.

Cold currents flowing ________ on the ________ sides of continents produce arid conditions.

Toward the equator; western

Equatorial currents are driven by the_

Trade winds

Which of the following is true of surface water circulation near Antarctica?

Two circumpolar currents dominate it, one current that moves water to the east and one current that moves water to the west.

Surface water are pushed away from land and replaced by nutrient-rich deep water through_.

Upwelling

Diverging surface waters are areas of ________ and ________ productivity.

Upwelling; high

Surface ocean currents are driven primarily by_and modified by _.

Wind ; the Coriolis effect

An increase in seawater density can be caused by a ________ in temperature or a/an ________ in salinity.

decrease; increase

The gulf stream is an example of which of the following types of currents? A: Eastern boundary current B: Equatorial Counter current C: Northern boundary current D: southern boundary current E: Western boundary current

western boundary current

Thermohaline circulation is driven by_.

Density differences

Western intensification causes: A: a steeper slope of surface water in the western section of the gyre as compare to the eastern section of the gyre. B:equatorial countercurrents C:The center of the gyre to be shift to the west D: very swift western boundary currents E: all of the above

All the above effects are the result of western intensification.

Coastal winds can cause upwelling or downwelling due to which of the following? A: eastern intensification B: Ekman transport C: equatorial upwelling D: Geostrophic current E: Western intensification

B: Ekman transport

Compared to an eastern boundary current in a gyre, which of the following statements is true for a western boundary current? A: Deeper currents B:Increased current velocity C: Warmer water D: Narrower current E: all of the above

E:Deeper currents, increased current velocity,warmer water, and narrower current are all true of western boundary currents.

Deep ocean currents are driven primarily by_ and caused by_.

density differences; differences in salinity and temp.

Deep-water currents move ________ volumes of water and are much ________ than surface currents.

larger; slower