Tropical Cyclones
What are they?
Tropical Cyclones are a particular type of low pressure system. They are areas of warm, moist air rising rapidly. The upward flow of air is deflected by the Carioles Effect, creating a rotation around the central core, known as the ‘eye.’
Tropical Cyclones are a particular type of low pressure system. They are areas of warm, moist air rising rapidly. The upward flow of air is deflected by the Carioles Effect, creating a rotation around the central core, known as the ‘eye.’
Where are they found?
They are
found on the coast.
Where do they form?
Tropical Cyclones form on warm water (sea water at least 27° Celsius). They need the energy provided form the warm water vapour and usually die out if they move inland away from the water vapour.
Tropical Cyclones form on warm water (sea water at least 27° Celsius). They need the energy provided form the warm water vapour and usually die out if they move inland away from the water vapour.
What do
they result in?
If a tropical cyclone occurs near large population centres, they can cause extensive damage to property and the loss of life. There are also strong winds, heavy rain and high seas. They can be both deadly and costly.
If a tropical cyclone occurs near large population centres, they can cause extensive damage to property and the loss of life. There are also strong winds, heavy rain and high seas. They can be both deadly and costly.
Which direction does
the wind blow around them?
In the northern hemisphere, the winds blow counter clockwise around the eye of the cyclone. In the southern hemisphere, the winds blow clockwise around the eye of the cyclone.
In the northern hemisphere, the winds blow counter clockwise around the eye of the cyclone. In the southern hemisphere, the winds blow clockwise around the eye of the cyclone.
What is the ‘eye’ of
a cyclone?
The eye of the cyclone is the centre of the cyclone.
The eye of the cyclone is the centre of the cyclone.
What happened in
Cyclone Tracey?
In Cyclone Tracey, it started with the Bureau of Meteorology detecting a low pressure system several hundred kilometres north of Darwin. However by late the next day it could be detected as a cyclone. Cyclone Tracey intensified as it moved towards the coast of Darwin, and on Christmas Day it hit Darwin with gusts ranging from 217-240 kilometres per hour. As it moved further inland, it degenerated into rain. Cyclone Tracey was a small cyclone in area but very intense. Its destructive effect was total, because it passed directly over Darwin and hit just as the residents were preparing to enjoy themselves for Christmas. It was Australia’s most destructive cyclone with 65 deaths- 16 of which were reported missing at sea. 80% of Australia’s banana crops and 20% of Australia’s sugar cane crops were ruined, and destroying $800 million worth of property.
In Cyclone Tracey, it started with the Bureau of Meteorology detecting a low pressure system several hundred kilometres north of Darwin. However by late the next day it could be detected as a cyclone. Cyclone Tracey intensified as it moved towards the coast of Darwin, and on Christmas Day it hit Darwin with gusts ranging from 217-240 kilometres per hour. As it moved further inland, it degenerated into rain. Cyclone Tracey was a small cyclone in area but very intense. Its destructive effect was total, because it passed directly over Darwin and hit just as the residents were preparing to enjoy themselves for Christmas. It was Australia’s most destructive cyclone with 65 deaths- 16 of which were reported missing at sea. 80% of Australia’s banana crops and 20% of Australia’s sugar cane crops were ruined, and destroying $800 million worth of property.
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