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Flashcards in L2 - Storm Hazards Deck (7)
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1

What are the physical hazards of cyclones?

High winds, landslides, intense rainfall, storm surges and large waves

2

What are the consequences of high winds, storm surges and large waves?

Coastal flooding, erosion, river damage, infrastructure damage etc.

3

What is a storm surge?

A tropical cyclone creates low pressure, sea levels rise, this + high winds means large water masses are moved to land by the wind with severe force.

4

What are additional factors needed for cyclones to form?

Humidity
Rapid cooling
Low wind shear (variation in wind speed)
Pre-existing low pressure disturbances

5

How does the ITCZ affect tropical cyclones?

Inter-tropical convergence zone, permanent area of low pressure so it is ideal for cyclone formation (near the Hadley cell). Band of thunderstorms that surround the equator. Source of cyclones

6

What factors affect tropical cyclone intensity?

Oceanic temperature - moving to colder water areas means less energy = lower intensity
Land - when it hits land it loses energy as its fuel source is lost - the ocean
Winds - if they are blowing in different directions the storm loses intensity

7

Why do landslides occur?

The rock becomes saturated due to heavy precipitation
The soil is heavy and cannot withstand its own weight, hence sliding.