geography

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”