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sweet [91]
3 years ago
14

How are changes in atmospheric CO2 over time recorded in the geologic record? List at least 4 tools/methods for reconstructing p

ast atmospheric CO2.
Geography
1 answer:
11Alexandr11 [23.1K]3 years ago
7 0

Answer:

boron and carbon isotope, Phytane, Ice cores, Corals, Lake and ocean sediments etc.

Explanation:

  • Drillings in ice cores like within ice sheets of Greenlands, Antarctica started in 1956. Collecting core samples of 4 and a half inches and use of molecules of water O 16 and 18 that helps to determine the past atmospheric carbon.
  • Corals, skeletal rings have bands of paleo-climatological information and as their body is made of the calcium carbonates these limes creating organisms help to determine the atmospheric concentration of carbon on prehistoric earth.
  • The use of oxygen isotope in lakes and oceans has given data related to the content of ocean sediments, and values deposited in clay and sand.
  • The use of phytane a diterpenoid alkane that breaks down chlorophyll is used to estimate the ancient Co2 level.
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