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Geography Year 10 Topic 1 > 1.4 Tropical Cyclones > Flashcards

1.4 Tropical Cyclones Flashcards

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1
Q

What is the coriolis force

A

A strong force created by the Earth’s rotation

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2
Q

What is the strong force created by the Earth’s rotation called?

A

Coriolis force

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3
Q

What is the eye?

A

The centre of a tropical storm

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4
Q

What is the centre of a tropical storm called?

A

Eye

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5
Q

What is seasonal distribution?

A

How something such as tropical cyclones occur at different times of the year.

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6
Q

What is the name of when something such as tropical cyclones occur at different times of the year?

A

Seasonal distribution

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7
Q

What is the track?

A

The path of the tropical storm.

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8
Q

What is the path of a tropical storm called?

A

The track

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9
Q

What is the source area?

A

The region in which a tropical storm first forms

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10
Q

What is the region in which a tropical storm first forms called?

A

The source area

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11
Q

What is the name of the ITCZ?

A

The intertropical convergance zone

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12
Q

What happenes at the ITCZ?

A

It is an area of permanently low pressure generated by global circulation within the Hadley Cells.

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13
Q

What are the four types of tropical cyclones?

A

Hurricanes
Cyclones
Typhoons
Willy-willies

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14
Q

Give statments that represent the structure of a tropical cyclone (3)

A
  • Tropical cyclones develop when Sea temperatures
    exceed 26.5 degrees.
  • Clear sky and no wind in the eye.
  • Winds rotate outwards at the top.
  • Warm moist air rises and pulls towards the centre.
  • Cloud tops can reach 12-15km high.
  • A dense canopy of cirrus cloud forms at the top.
  • Winds increase in strength at the eye wall.
  • Cumulonimbus clouds form.
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15
Q

When do tropical cyclones form?

A

-They develop in late summer in the northern
hemisphere.
-They develop mid January to March in the
Southern Hemisphere.

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16
Q

What impacts tropical cyclones?

A

Warmer water and dissipation ( losing energy)

17
Q

Explain how warm water impacts tropical cyclones

A

The warmer the water that fuels the tropical cyclone, the more intense the tropical cyclone will be.

18
Q

Explain how dissipation impacts tropical cyclones.

A

Dissipation (losing energy) happens when it reaches land, when it moves to areas of cold water, or when it runs into other weather systems with winds blowing the opposite way.

19
Q

What is air pressure measured in?

A

Millibars

20
Q

What is the air pressure of a tropical cyclone compared to the air surrounding them?

A

Tropical cyclones have much lower air pressure than the air surrounding them.

21
Q

What is the first stage in the formation of tropical cyclones?

A

Warm air currents rise from the ocean as the warm air rises more air rushes into replace it then it rises drawn by the draught above.

22
Q

What is the second stage of the formation of a tropical cyclone?

A

Updraughts of air contain huge volumes of water vapour from the oceans, which condense to produce cumulonimbus clouds. Condensation releases heat energy stored in water vapour, which powers the cyclone further.

23
Q

What is the third stage in the formation of a tropical cyclone.

A

Coriolis force causes rising currents of air to spiral around the centre of the tropical cyclone, so it resembles a whirling cylinder. It rises and cools, and some of it descends to form the clear, cloudless, still, eye of the storm.

24
Q

What is the fourth stage in the formation of a tropical cyclone?

A

As the tropical cyclone tracks away from its source, it is fed new heat and moisture from the oceans,
enlarging as it does so.

25
Q

What is the fifth stage of the formation of a tropical cyclone?

A

Once it reaches a landmass, it loses its energy source from the ocean. Air pressure rises as temperature falls, winds drop, rainfall decreases, and it decays to become a mere storm.

Geography Year 10 Topic 1 (10 decks)

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