Climate Change - Evidence
- Created by: Brad_ers_B
- Created on: 14-05-15 13:07
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- Climate Change - Evidence
- Physical
- Ice cores
- Extract cores of ice from ice sheets
- Ice sheet = made up of a layer per year
- Analysing gasses trapped when formed
- High CO2 = Warmer climate
- More O-16 = Colder
- More O-18 = Warmer
- Extract cores of ice from ice sheets
- Sea floor sediments
- Sediment records the chemical composition of seawater
- Works like ice cores with O-16+O-18
- Sea level change
- Melting of land ice
- Islands being submerged
- Retreating glaciers
- Historical photos and position of rocks deposited
- Distance of rocks from current glacier indicates change
- Ice cores
- Biological
- Pollen Analysis
- Preserved in sediment (varves)
- Look at climate of plants now to find what it was like
- Coleoptera
- Beetles preserved in sediments
- Different species, different climate
- Tree rings
- New ring every year
- Thicker = Warm, wet
- Show and date climate conditions up to 10000 years ago
- Pollen Analysis
- Physical
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