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Marine > Ocean circulation > Flashcards

Ocean circulation Flashcards

1
Q

density of air is controlled by…

A

pressure, moisture, temperature

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2
Q

warm air and moist air is…

A

less dense

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3
Q

air pressure

A

weight of atmosphere

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4
Q

winds are caused by

A

pressure differences

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5
Q

low pressure

A

air pressure/density lower than surrounding area, air expands up

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6
Q

high pressure

A

air pressure/density higher than surrounding area, air contracts

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7
Q

pressure gradient

A

high to low, short distance means high pressure

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8
Q

wind/ocean naming

A

wind by direction coming from ocean direction travelling to

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9
Q

global circulation

A

equator has low pressure due to heating which rises and travels to poles, high pressure forms and sinks

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10
Q

coriolis

A

highest at poles, none at equator

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11
Q

convection cells

A

warm air rising/sinking from equator to poles

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12
Q

hadley cells

A

near equator

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13
Q

ferrel cells

A

mid latitude

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14
Q

things affecting ocean currents

A

pressure gradient, density, coriolis

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15
Q

causes of currents

A

transfer of energy by wind

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16
Q

gyre current

A

circulation current between continents

17
Q

mound

A

high pressure

18
Q

what causes pressure differences in ocean

A

mounds

19
Q

ekman transport

A

water moving down water column

20
Q

upwelling

A

wind blows parallel, water is moved and is replaced by upwelling

21
Q

downwelling

A

wind blows parallel, water moved towards shore and water sinks

22
Q

langmuir circulation

A

alternating convergence/divergence

23
Q

geostrophic winds

A

caused by mounding in gyres, high to low on mound then deflected, then coriolis equals pg, causing wind to flow at bas and build up height

24
Q

currents in gyres are

A

asymmetrical

Marine (19 decks)

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