In the figure below,why is there a seasonal variation in carbon dioxide (CO₂)concentrations? A) CO₂ concentrations rise and fall as photosynthesis decreases and increases. B) CO₂ concentrations rise and fall in conjunction with power plant emissions. C) CO₂ concentrations rise and fall with variations in solar radiation. D) The measurements were made in different places at different times of year.

Question

Quizplus · Accepted Answer

The seasonal variation in carbon dioxide concentrations is due to photosynthesis. During the summer months, there is more photosynthesis occurring, which removes carbon dioxide from the atmosphere, resulting in lower concentrations. In the winter months, photosynthesis decreases, leading to an increase in carbon dioxide concentrations.

In the Figure Below,why Is There a Seasonal Variation in Carbon