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7709413
Geography: Tropical Storms
Description
Geography Mind Map on Geography: Tropical Storms, created by loveday ayto on 16/02/2017.
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geography
tropical storms
natural hazards
geography
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loveday ayto
, updated more than 1 year ago
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Naomi CALVERT
almost 10 years ago
Copied by
loveday ayto
over 7 years ago
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Resource summary
Geography: Tropical Storms
Causes of tropical storms
They start with hurricanes over the sea at a temperature of at least 27 C
The warm air from the sea combines with the warm air from the thunderstorm and this warm air rises
Due to the Earth's rotation, the storm starts to move in a spiral. The direction of the spiral depends on which hemisphere it occurs in.
The warm air forms clouds when it cools and condenses. The cooler air is sucked downwards as the wind speed starts to increase.
The tropical storm then moves over the ocean in a westerly direction because of the spin of the earth from east to west.
Coriolis effect
In the northern hemisphere the tropical storms spin in an anti-clockwise direction and in the southern hemisphere they spin in a clockwise direction.
Tropical storms are areas of low pressure that are surrounded by high pressure which then cause huge swirling masses of clouds
Effects of Tropical Storms
Primary Effects
Tropical Storm Haiyan (2013, Philippines)
Destroyed buildings
No standing structures a kilometer inland
Houses flattened
Hurricane Sandy (2012,USA)
Crops destroyed
69 Deaths in the Caribbean
Secondary Effects
Nearly a million people without power
Petrol rationed
Spread of Cholera in flooded areas
Local people homeless
Little food, no clean water, no electricity
Roads Blocked
Deaths from drowning
Wide spread looting
Reducing the Damage of Tropical Storms
Forecast
Prepare
Act
Evacuation plans put in place
Education programmes to raise awareness on preparing and responding to a tropical storm, school lessons and posters can be used to spread awareness
In some areas buildings are designed and built to withstand tropical storms with features such as water resistant windows and windproof tiles.
In less developed countries they can't afford to develop buildings so they use other methods to prepare such as:
Educating women what to wear in case they have to swim
Building homes on stilts
Building cyclone shelters
Forecasts made by the National Hurricane Warning Centre (Atlantic)
Typhoon Warning Centre (Pacific)
Forecasts are available on the internet so that anyone within the cone of uncertainty can prepare for the worst
The speed and path of a tropical storm can be affected by many different factors so they are hard to predict
More tropical storms to come?
There is disagreement to whether the number of tropical storms is changing
Satellites were only used to monitor tropical storms since the 1960s so the number might have not been accurate before then
Natural Cycle could mean that the amount of tropical storms reduces again soon when it gets to the end of the cycle.
Number of tropical storms has doubled in the last 100 years
Global warming means the surface of the ocean have warmed up by 0.5 C
Since 1195 hurricanes have become more frequent and intense.
Short-term changes to the number of tropical storms may not be due to the actions of people
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