Cyclones

Question 1

Where and when do tropical cyclones develop

Answer 1

-occur in bands of low pressure and war temperature between 5 degree and 30 degree N and S of the equator
—>these conditions are created by atmospheric circulation

-when the sea temp in 27 degrees or higher

-when the wind shear (diff in wind speed) between higher and lower parts of the atmosphere is low

-occur mainly in the northern hemisphere in late summer & autumn when sea temps are highest

Question 2

How do cyclones develop

1. warm, … air rises and …, releasing huge amounts of … making the … more …
   2.the … air creates an … of … pressure which increases … winds
   3.tropical … move … because of easterly … near the …, the earths … deflects the … making the storm …
   4.the cyclones gets … due to … from warm ..
   so wind … increase, they loose … when the move over … or … water bc their energy … is cut …

Answer 2

1. warm, moist air rises and condenses , releasing huge amounts of energy making the storm more powerful
   2.the rising air creates an area of low pressure which increases surface winds
   3.tropical cyclones move west because of easterly winds near the equator, the earths rotation deflects the wind making the storm spin
   4.the cyclones gets stronger due to energy from warm water so wind speeds increase, they loose strength when the move over land or cooler water bc their energy supply is cut off

Question 3

Features and structure of tropical cyclones

-the … is called the …
-the eye is surrounded by the … wall
-spin … in northern …
-spin … in southern …
-… shaped
-… of Km wide

Answer 3

-the centre is called the eye
-the eye is surrounded by the eye wall
-spin anti-clockwise in northern hemisphere
-spin clockwise in southern hemisphere
-circular shaped
-hundreds of Km wide

Question 4

Conditions in the eye

-caused by … air
-very … pressure
-… winds
-no …
-… temperature

Answer 4

-caused by descending air
-very low pressure
-light winds
-no rain
-high temperature

Question 5

Conditions of eye wall

-where there is … rising …
-very … winds
-… clouds
-… rain
-… temperature

Answer 5

-where there is spiralling rising air
-very strong winds
-storm clouds
-torrential rain
-low temperature

Question 6

Conditions at the edge of the cyclone

-… speed …
-clouds are … and more …
-less … rain
-… temperatures

Answer 6

-wind speed falls
-clouds are smaller and more scattered
-less intense rain
-higher temperatures

Question 7

Hazards of tropical cyclones when they hit land

-h… w…, ……..
-i… r…, ……..
-s… s…, ……..
-c… f…
-l…

Answer 7

-high winds, can reach up to 250km/h
-intense rainfall, release trillions of litres of water per day
-storm surges, large rise in sea level, flood defences breached
-costal flooding
-landslides