climate change
- Created by: aliciajoness
- Created on: 02-12-16 13:04
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- Climate Change
- Little Ice Age
- Effects On People
- Food prices increased.
- Ice lakes burst periodically,destroying buildings and killing people.
- Population decreased - cold and no food. (great famine of 1317-1325).
- Effects On Farming
- Changing times of harvest.
- New crops have to adapt to climate.
- Crops didn't ripen and harvest failed
- Effects On People
- Evidence Of Climate Change
- The Distant Past
- Fossilised animals, plants and pollen that no longer live in the UK.
- Landforms, like U-shaped valleys left by retreating glaciers.
- Samples from the ice sheets of Greenland and Antartica.
- The Recent Past
- Old photographs, drawings and paintings of the landscape.
- Written records such as diaries, books and newspapers.
- Recorded dates of regular events e.g harvests.
- The Distant Past
- Changes In The UK Climate
- Warm in roman times.
- Cold from 1400-1800.
- Warm and cold spells since 400 BC.
- Causes Of Climate Change
- Eruption Theory
- Volcanic eruptions can alter the earths climate.
- Has to be large to change anything.
- Eruptions produce: ash and sulphur dioxide gas
- Ash stops sunlight getting to earth.
- If gas and ash rise high enough they spread round the earth.
- Orbital Theory
- Occurs because of the way the earth orbits the sun.
- If earths axis tilts or wobbles, it affects the amount of sunlight the earth recieves.
- Asteroid Colllisions
- A huge asteroid would blast tones of ash into the atmosphere.
- Climate would cool and dust and ash would block sunlight.
- Sunspots and Solar Outputs
- Sunspots are black areas on the surface of the sun.
- Lots of spots mean more solar energy fired out to earth from the sun.
- Eruption Theory
- Major Climatic Events
- Extinction Of Megafauna
- Less prey for carnivores (humans hunted for them.
- Climate earmed up.
- Migrated to find a climate to suit them. It was hard to find the right plants to eat. Disrupted food chains.
- Extinction Of Megafauna
- Future Climate Change
- Green House Gases
- Human Activities That Increase It
- Power Statons.
- Travelling.
- Human Activities That Increase It
- Ocean Influence.
- warm ocean current impacts it.
- Air Mass.
- Green House Gases
- Greenhouse Effectt
- The way that gases in the atmosphere trap heat from the sun.
- Enhanced Greenhouse Effect
- Enhanced means its working more strongly.
- Evidence
- CO2 levels have risen.
- Developed places produce more CO".
- Global temps have gone up.
- Sea levels risen by 195mm in last 135 years.
- CO2 levels have risen.
- Effects Of A Warmer UK
- Costs
- Drought and water shortage.
- More illnesses such as skin cancer.
- Certain animals may die out.
- Benefits
- Tourism will increase.
- Heating costs reduced.
- Less elderly deaths.
- Costs
- Effects Of Future Climate Change In LEDC (Egypt)
- Flooding.
- Water Shortages.
- Loss of farmland and food.
- Spread of Disease..
- Rising temps.
- Rising sea levels.
- Water conflict in Egypt.
- South Egypt take water from the Nile.
- Little Ice Age
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