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OCNG 251 Session 8 Flashcards | StudBud
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OCNG 251 Session 8
OCNG 251 Session 8
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Answers
1
What is a gyre made up of?
9 interconnected currents
4 interconnected currents
7 interconnected currents
2 interconnected currents
2
Which of the following are characteristics of El Nino event conditions?
ITCZ can shift south of equator
Slowing of upwelling off Peru
Weakening trade winds or reversals
Thermocline depends in eastern Pacific
3
Hurricane Katrina was a massive storm surge 8 m high because...
She was moving quickly northward
ALL THE ABOVE
Low atmosphere pressure
High wind speed
4
Which statement is incorrect about sunlight at low latitudes?
No reflection
Concentrated in a smaller area
Filters through more atmosphere
High angle of incidence
5
What are mother nature's release valves?
Tornados
Hurricanes
Volcanos
Rainstorms
6
What does endemism mean?
Describes the direction of earth's rotation
Another name for eastern currents
Species of organisms unique to an area
A fast change in temperature
7
The Antarctic circumpolar current is a gyre.
True
False
8
Which words describe western boundary currents?
Cold, wide, shallow, fast
Cold, narrow, deep, slow
Warm, wide, shallow, fast
Warm, narrow, deep, fast
9
Most of the ocean surface is warm water.
True
False
10
What are countercurrents?
Flow on the surface in the same direction as the main currents
Flow on the surface in the opposite direction as the main currents
11
What distributes nutrients needed for primary productivity?
Downwelling
Upwelling
12
What modifies the course of ocean currents?
Coriolis effect
Ekman spiral
Weather
Temperature
13
Downwelling at the center of a gyre causes...
High nutrient concentrations
No effect
Low nutrient concentrations
14
Which latitude has the most seasonal variation?
All are equal
Low latitudes
Mid latitudes
High latitudes
15
What is the limiting factor in the arctic?
Light
Temperature
Food
Time
16
Which 5 eastern boundary currents are associated with coastal upwelling?
Japan, Gulf Stream, California, Agulhas, Canary
Benguela, Somali, Washington, Hiroshima, Peru
Brazil, Canary, Western and Eastern Australia, Somali
Peru, California, Benguela, Canary, Somali
17
In the northern hemisphere, a tropical cyclone with the influence of Coriolis effect, turns in what direction?
Counter clockwise
Clockwise
18
What is the pressure like at 30 deg. N and S?
Low
High
19
Contour currents are relatively fast currents formed by...
Bottom topography
Top topography
20
What is the weather like at 60-90 deg. N and S?
Winter wet, summer dry
Cold polar air with very low temperatures
Stormy, cloudy; ample precipitation in all seasons
Little cloudiness; dry in all seasons
21
What are the doldrums caused by?
Hadley cell convergence
Naturally occur by itself
Polar cell convergence
Ferrel cell convergence
22
In the northern hemisphere, surface ocean currents flow in what direction in gyre circulation cells.
Clockwise
Counter clockwise
23
What are the factor(s) the global circulation of air is governed by?
Uneven solar heating and rotation of earth
The proportions of nitrogen and oxygen
Changes in climate
Even solar heating
24
Where are the doldrums (ITCZ) located?
60 deg. N and S
Equator
90 deg. N and S
30 deg. N and S
25
From the tropics to polar latitudes, the surface wind patterns are responsible for how much of the heat transfer?
1/4
1/2
1/3
2/3
26
What is Ekman transport?
To the left of wind direction in the eastern hemisphere
Summed net motion of water which is 50 deg. (in theory)
Summed net motion of water which is 90 deg. (in theory)
To the right of wind direction in the souther hemisphere
27
Why is the hill in the center of a gyre offset to the west?
Because of the temperature
It's not offset
Because of the rotation of the earth (earth's spin)
Because of a thermocline
28
Why does summer land heat up more and faster than ocean water?
Because they have the same heat capacity
Because of its lower heat capacity
Because of its higher heat capacity
29
What is the name of 30-60 deg. N and S?
Polar easterlies
Prevailing westerlies
Poles
Trade winds
30
Which of the following is/are examples of eastern boundary currents?
Eastern Australian current
Canary current
ALL THE ABOVE
Mississippi current
31
What is the region the horse latitudes are located in?
60 deg. N and S
90 deg. N and S
0 deg.
30 deg. N and S
32
Wind patterns that change with the seasons are called...
Conservative
Ekman spiral
Monsoons
Jet streams
33
What does ITCZ stand for?
International cell zones
Intertropical convergence zone
Intertropical circulation zone
International tropics circulation zone
34
The Hg (horizontal gravitational force) is ________ whether you move east to west.
Unaffected
Affected
35
Upwelling and downwelling describe what type of movement of water masses?
Vertical movement
Horizontal movement
36
Which of the following is not a characteristic of monsoon currents?
No northern hemisphere circulation
Indian ocean is relatively small
Has no seasonal change in circulation pattern
Most in southern hemisphere
37
What shape do warm core rings have?
Convex in the middle
No shape
Concave down
Concave up
38
What enhances coastal upwelling?
Haloclines
Currents
Photosynthesis
Wind
39
What words describe the surface winds at 60 deg. N and S?
Heavy
Light
Variable
40
What direction do warm core rings move in?
Counter clockwise
Clockwise
41
Is salinity high or low at low pressure zones?
Low
High
42
Which words describes eastern boundary currents?
Warm, slow, narrow, deep
Cold, slow, wide, shallower
Warm, fast, narrow, shallower
Cold, fast, wide, shallower
43
The heat budget is balanced.
False
True
44
Where are equatorial currents located?
ITCZ
Westerlies
Meteorological equator
Meteorological equator and ITCZ
45
Hot air goes to the poles to make up for the lack of it.
True
False
46
Where are the tropical rains located?
Equator
90 deg.
60 deg.
30 deg.
47
What does 1 Sverdrup (sv) equal?
1 billion cubic meters of water per second
1,000 cubic meters of water per second
1 million cubic meters of water per second
1 million cubic meters of water per minute
48
Which of the following describes Langmuir circulation?
Wind currents that flow west to east and east to west
Winds caused by a pressure gradient and pycnoline
Steady winds producing long sets of helical, counter rotating sets of cells
A wind in the shape of a spiral
49
The sub polar ocean climate zone has...
Warm surface water and atmosphere
Icebergs
Strong westerlies
Doldrums
50
What direction do cold core rings move in?
Clockwise
They don’t
Counter clockwise
Any way they want to
51
What shape do cold core rings have?
Concave down
Concave up
Convex up
Convex down
52
Which of the following is not an example of a western boundary current?
Japan (Hiroshima) current
Brazil current
Gulf Stream
Peru current
53
Rays can strike the earth...
At an angle
Parallel to the surface
ALL THE ABOVE
Perpendicular to the surface
54
The rate of velocity changes per degree of latitude change is not constant.
False
True
55
Which element is the most abundant in the atmosphere?
Oxygen
Nitrogen
Neon
Helium
