Question

Which factor or factors are responsible for the timing and severity of the ice ages that occurred over the past 800,000 numerous ice years?

a)Changes in solar forcing only
b)Changes in CO₂ levels only
c)Changes in solar forcing amplified by changes in CO₂ levels
d)Very large volcanic eruptions

Answer 1

Changes in solar forcing amplified by changes in CO2​ levels

Step-by-step explanation:

Carbon dioxide and other greenhouse gases mostly served as feedback to external climate forcings in the geologic past.

Answer 2

The timing and severity of ice ages are influenced by changes in solar forcing amplified by changes in CO₂ levels, along with very large volcanic eruptions. Hence, the correct answer is option A.

Step-by-step explanation:

The timing and severity of the ice ages that occurred over the past 800,000 years can be attributed to a combination of factors, including changes in solar forcing and changes in CO₂ levels. These factors work together to amplify the effects of each other and contribute to the climate fluctuations experienced during the ice ages.

Changes in solar forcing refer to variations in the intensity of the sun's radiation, which can affect the amount of energy Earth receives. These changes can be influenced by factors such as variations in the Earth's orbit and solar activity. When solar forcing is amplified by changes in CO₂ levels, it can lead to significant changes in climate, including the onset and severity of ice ages.