The Challenge of Natural Hazards Part 3 Flashcards
What does prediction of earthquakes involve
Seismometers to measure earth tremors
What does protection against earthquakes involve
Constructing buildings so that they are safe to live in and will not collapse
What are some examples of building improvements
Rubber shock absorbers
Steel frames that sway
Open areas outside
What does preparation help with decreasing risk of earthquakes
Practicing increases chance of survival and reduces impact
Why does global atmospheric circulation help to determine
Patterns of weather and climate
Does air rise or fall at equator
Rise
What does air at the equator lead to
Low pressure and rainfall
When air reaches the edge of atmosphere at the equator where does it travel
North or south
What happens when the air reaches the tropics
Becomes denser and colder and falls creating high pressure and dry conditions
After the tropics where does the air start to rise again and descend
Rises at The circles and descends at the poles
What are the cells furthermost north and south called
Polar cells
What are the cells at the tropics called
Ferrel cells
What is are the cells called near the equator
Hadley cells
What happens at the Hadley cells
The ground is intensely heated by sun
This causes air to rise causing low pressure on earths surface
As air cools it forms thick cumulonimbus clouds causing rainy conditions
The air then moves north and south
In the northern hemisphere where to the winds flow to and what are they called
Right and are called northeast trade winds
In the Southern Hemisphere where does wind flow to and what is it called
Left and are called southeast trade winds
Why do trade winds move this way
Because of the Coriolis force and friction
What happens at the ferrel cell
Air on surface is pulled towards poles forming warm south westerly winds in north and north westerly winds in south
Pick up moisture as travel across oceans
Meet with cold air from poles
Warm air rises cold air doesn’t
Low pressure at surface and unstable weather conditions
What happens at polar cells
air is cooled and sinks towards ground forming high pressure
The flows towards circles
Cold air mixes with tropical air and rises upwards
What are the three tropical storms
Hurricanes cyclones typhoons
What is a tropical storm
Is a very powerful low pressure weather system which results in strong winds and heavy rainfall
How strong are the winds in a tropical storm
Over 120 km/h
How much rainfall received in a tropical storm
Up to 250 m in one day
What is the Distribution of tropical storms
Between tropics, up towards south of USA, down towards north of Madagascar, up towards south of India, up towards south east Asia, down towards north of Australia
