Climate Change

Climate Change

• Weather: Is what we get. Can change constantly (Air pressure, wind etc.)
• Climate: Average weather conditions, what we get over a longer period of time
• Climate Change: How the average weather conditions change over time. 

How we can measure climate change

• Some evidence goes back 800,000 years
• Glacial: 100,000 Interglacial: 10,000

Long Term:

Ice Cores:

• Taken from Greenland and Antarctic ice sheets
• Measure CO2 given off when melted
• Air bubbles in the core show CO2 in the ice
• Glacial periods have low CO2 ppm
• Carbon levels are higher now than ever

Pollen Analysis:

• Pollen from plants preserved in sediments
• Scientists core peat bogs where the pollen is preserved…