What Property of Glacial Ice Helps Climatologists to Reconstruct the CO₂

question 54

Multiple Choice

What property of glacial ice helps climatologists to reconstruct the CO₂ concentrations of the atmosphere during the past?

• A)The ratio of oxygen isotopes in the ice.
• B)The contents of the air bubbles trapped in the ice.
• C)The amount of volcanic ash frozen in the ice.
• D)The amount of ¹⁶O in the water.