Paper 1 - Weather Hazards and Climate Change Flashcards
Define ‘Weather’
The state of the atmosphere at a particular place and time and regards to heat, cloudiness, dryness, etc
Define ‘Climate’
The statistics of weather over a 30 year interval
Name the 3 types of Cell
Polar, Ferrel and Hadley
What direction does wind rotate on the northern hemisphere?
Anticlockwise
What direction does wind rotate on the southern hemisphere?
Clockwise
Why can’t winds travel in straight lines?
The earth is rotating
What is the ‘rotating winds’ effect called?
The coriolis effect
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What causes low pressure?
Warm air, air rising
What causes high pressure?
Cold air, air sinking
What is wind?
The movement of air from high to low pressure
Define ‘trade winds’
Warm winds that blow across the equator
What does ITCZ stand for?
Inter Tropical Convergence Zones
In what ways can we find put about past climates?
- Pollen records
- Tree rings
- Historical records
- Ice cores (air bubbles)
- Fossils & carbon dating
Name the three Milankovitch cycles
Eccentricity, axial tilt and precession
What is eccentricity?
The change in earth’s orbit every 100,000 years between circular (warmer and interglacial) and elliptical (colder and glacial)
What is axial tilt?
The angle at which the earth is can change every 40,000 years and dictate the difference in our seasons
What is precession
When the earth wobbles on its axis and change the direction it is facing, every 24,000 years
How does Maritime effect the weather?
Winds that travel over seas pick up more moisture and cause rainfall all year round
What is the prevailing wind in the UK?
South Westerly
What does the SW wind mean for the east of the UK?
It is drier
How does North Atlantic Drift effect the UK?
It brings warmer water from the gulf of Mexico, giving the UK a warmer climate than expected for our latitude
What cell is the UK Located in?
Between Polar and Ferrel
How do you work out altitude?
The higher it is, the colder it is, -1°C for every 100m above sea level
[CASE STUDY: The Maldives] 1) What social effects does flooding have on the Maldives?
- Increase in waterborne diseases
- Food and Crop shortages
- Migration to safer areas