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What is Global Atmospheric Circulation
The worldwide system of winds that transports heat from tropical to polar latitudes.
What does Global Atmospheric Circulation do
Creates winds across the planet and drives weather.
What are the three cells that makes up the Global Atmospheric Circulation system
Made of 3 cells: the Hadley, the Ferrel and the Polar cells.
Where is the Hadley cell located
Between 0 degrees and 30 degrees N/S of the equator
How does the air behave in a Hadley cell
Warm, moist air rises -> air cools, clouds form, rain falls -> cool, dry air descends.
What does air rising do
The air rising causes low pressure
What does air sinking do
The air sinking causes high pressure (dry conditions, little cloud and low rainfall)
Where is the Ferell cell located
Between 30 degrees and 60 degrees N/S of the equator
How does the air behave in a Ferrel cell
Air moves from high to low pressure
What happens as the air travels in a Ferrel cell
As the air travels it forms the warm south westerly winds in the northern hemisphere and north westerly winds in the southern hemisphere
How does the air in a Ferrel cell pick up moisture
As the air travels from 30 degrees N/S it travels over oceans and picks up lots of moisture
what happens at the end 60° north/south of the equator
At around 60 degrees N/S the warm moist air meets cold air from the poles.
what is a weather front
The warm moist air rises up as it meets the cold air (this is called a weather front)
where does the Polar cell occur
Between 60/70 degrees and 90 degrees N/S of the equator
how does the air behave in a Polar cell
Air is cool and dry, sinking towards the ground
what is the pressure like over the Poles
high pressure
what type of hazard is a tropical storm
Natural hazard
when does a tropical storm occur
Occurs when warm, moist air rises to create an area of intense low pressure.
what happens as the warm moist air rises
As the warm moist air rises, winds spiral around the central point creating the eye of the storm the warm air condenses into rainfall and thunderstorms.
what are the different names for tropical storms
Hurricanes, Typhoons and Cyclones
does a tropical storm occur in low latitude areas or high latitude areas
Low latitude areas
what is the temperature is required for a tropical storm
Sea temperatures above 27 degrees
what type of Winshire is required for a tropical storm
A low wind shear
what are the three stages of a tropical storm
Three stages - origin, mature and dissipation
how high do clouds grow in tropical storms
Clouds grow to 15- 20 km
what type of pressure does the eye of the storm have
Eye has high pressure
what type of pressure do the walls of the storm have
Walls have low pressure
what do warmer temperatures lead to
Warmer temperatures -> sea levels will rise -> higher storm surges
is the number of severe tropical storm is expected to increase or decrease
Number of severe tropical storms expected to increase
where did typhoon Haiyan occur
Occurred in the Philippines
are the Philippines an HIC or an LIC
LIC
what percentage of Tacloban was destroyed
90% of Tacloban was destroyed
how many crops were destroyed in typhoon Haiyan
1.1 million crops destroyed
how many houses were damaged or destroyed in typhoon Haiyan
1.1 million houses damaged or destroyed
how many people were affected in typhoon Haiyan
14.1 million people affected
how high was the storm surge in typhoon Haiyan
6m high storm surge
how many people were left homeless or displaced in typhoon Haiyan
4.1 million people left homeless or displaced
how many people were evacuated before typhoon Haiyan
800,000 people were evacuated
what was the Philippines declared after Typhoon Haiyan
Declared “A State of National Calamity”
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