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physical oceanography
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Questions in this quiz (27)
1oceanic trenches form from subduction of continental crust by oceanic crust
- ATrue
- BFalse
2which of the following is FALSE w.reference to isostasy?
- Ait is a state os gravitational equilibrium...
- B...between the lithosphere and crust...
- C...such that tectonic plates 'float'
3which of the following is FALSE?
- AIn hadley cells, rate of precipitation > rate of evaporation
- BIn polar cells, rate of precipitation < rate of evaporation
- CIn ferrel cells, rate of precipitation > rate of evaporation
4what are 3 forces affecting ocean circulation and what are they modified by (3)?
- Aforce balance, surface wind stress, buoyancy; Ff, Fc, tidal forces
- BpH, surface wind stress, force balance; Ff, Fc, Fw
5deep-ocean circulation is thermo-haline driven
- ATrue
- BFalse
6why does the thermal equator deviate further North in july?
- Abecause it as bored where it was
- Bbecause the higher % land mass in the N is more insulating
- Cbecause there is a higher % ocean mass in the N and is more insulating
7why has the atlantic ocean a higher salinity than the pacific?
- Ab/c trade winds pick up moisture from the atlantic that is later rained off in the pacific
- Bb/c trade winds pick up moisture from the pacific that is later rained off in the atlantic
- Cb/c it just is ok
8-ve p values indicate a low-salinity, low-temp environment
- ATrue
- BFalse
9what is the difference in wave spectrum in the fetch and dispersion areas?
- Afetch - chaotic; dispersion - organised by speed
- Bfetch - chaotic; dispersion - organised by amplitude
10as waves near the shore, their speed becomes less controlled by water depth and more controlled by wavelength
- ATrue
- BFalse
11which of the following is FALSE
- Alocal vorticity is low at the equator
- Bplanetary vorticity is low at the equator
- Clocal vorticity is low when encountering friction w/continents
- Dplanetary vorticity is low when encountering friction w/continents
12surface ocean currents move at a 45deg angle to the wind that is acting upon it
- ATrue
- BFalse
13surface ocean currents move at a 45deg angle to the wind that id acting upon it because:
- Aof the balancing of Fc and Fw
- Bof the balancing of Fw and Ff
14which of these is NOT a cause of the ekman spiral?
- Ahow Fw decreases w/depth
- Bthe layered nature of the ocean (be it t, s, p)
- Csurface current activity
15the ekman layer is the layer encapsulating the ekman spiral
- ATrue
- BFalse
16the net transportation in the ekman layer is 90deg to the left in the NH
- ATrue
- BFalse
17which of the following is not a contributor to the formation of oceanic gyres?
- AFw
- Bekman transport
- Cbalancing of Fc and geostrophic currents by pressure gradient
- Dcoastal friction
18eddies are produced so as to conserve vorticity by removing drag of coastal friction
- ATrue
- BFalse
19which of the following correctly describes the differences in thermocline during the summer and spring?
- Asummer - prominent, shallow; spring - less prominent
- Bspring - less prominent, deep; summer - prominent, deep
20which of the following is NOT (Generally) an area of changing salinity?
- Aareas of ice melting
- Bopen ocean
- Criver-sea boundaries
21what gave rise to central ocean water (COW)?
- Amixing of water masses as a response of changing seasons
- Bsomething else
22how is AABW generated?
- Afrom sea ice
- Bfrom continental ice sheets
- Cfrom ice berg
- Dfrom the cooling and sinking of another water mass
23how was UNADW formed?
- Awinter cooling in labrador sea, leading to sinking
- Bstrong winds cooling surface promoting mixing
24how was LNADW formed?
- Awinter cooling in labrador sea, leading to sinking
- Bstrong winds cooling surface layers, promoting mixing
25LNADW is situated below UNADW because of its low salinity
- ATrue
- BFalse
26a polynya is a continuous area of open ocean amidst a region of sea ice formation
- ATrue
- BFalse
27which of the following is true:
- AMW: 8-10deg, 35-36.2%; AIW: 3-5deg, 34.3%; AABW: -0.8-2deg, 34.6-7%; NADW: 2-4deg, 34.9-35%.
- BMW: 3-5deg, 35-36.2%; AIW: 8-10deg; AABW: -0.8-2deg, 34.6-7%; NADW: 2-4deg, 34.9-35%.
- CMW: 8-10deg, 35-36.2%; AIW: 2-4deg, 34.9-35%.; AABW: -0.8-2deg, 34.6-7%; NADW: 3-5deg, 34.3%.
- DMW: 8-10deg, 35-36.2%; AIW: 3-5deg, 34.3%; AABW:2-4deg, 34.9-35%, 34.6-7%; NADW: -0.8-2deg.
Information
- Description
- Quiz on physical oceanography , created by rhianadevans on 24/04/2015.
- Author
- rhianadevans
- Language
- English
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