GEOGRAPHY - CLIMATE CHANGE, how we know climate has changed
- Created by: Rachieba01
- Created on: 06-04-17 12:52
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- How do we know climate has changed?
- Ice cores
- Drilling and taking out large sheets of ice from ares like Antarctica
- Measuring levels of CO2 within the bubble in the sheets of ice
- By measuring the CO2 geologists can find out what the atmosphere was like 20,000 years ago
- To give a better understanding of how climate has changed over time and will continue to change
- Most effective method
- Measuring levels of CO2 within the bubble in the sheets of ice
- Drilling and taking out large sheets of ice from ares like Antarctica
- Sea Ice Maximums
- Looking at rock types under the sea
- Some rocks dropped by ice sheets can tell us about the climates in the past and how the earth has evolved
- Areas like Antarctica can give is the most reliable information
- Paintings and diaries
- Some painting or diaries that have content f animals or weather can give an implication if what the climate was like
- for example a painting of the frozen Thames
- However this is the least reliable source
- Some painting or diaries that have content f animals or weather can give an implication if what the climate was like
- Different time periods
- The Quarternary period started 2.6 million years ago and is the time since earth's most recent ice age
- The Holocene is a relatively warmer phase that we are in now
- The invention of farming and civilisation has happened during the Holocene
- The Pleistocene was a cold period of time
- Ice cores
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