How do scientists measure the amount of carbon dioxide in the atmosphere for dates prior to the 1955?

Question

Quizplus · Accepted Answer

Scientists can measure the amount of carbon dioxide in the atmosphere for dates prior to 1955 by analyzing air bubbles trapped in glacial ice cores. The ice serves as a natural archive, and as the ice accumulates over time, it traps air bubbles that contain information about past atmospheric conditions, including carbon dioxide levels. By drilling and extracting ice cores, scientists can analyze the air bubbles to estimate carbon dioxide concentrations for past periods.

How Do Scientists Measure the Amount of Carbon Dioxide in the Atmosphere