In a scenario describing a thermal inversion, which location would show the highest pollutant concentration near the surface?

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Prepare for the AP Environmental Science Exam. Study with quizzes and multiple choice questions covering atmospheric pollution. Each question offers helpful hints and detailed explanations to boost your knowledge and confidence. Tackle the exam with assuredness!

Multiple Choice

In a scenario describing a thermal inversion, which location would show the highest pollutant concentration near the surface?

Explanation:
Thermal inversions create a stable lid of warmer air above cooler air near the ground, which curtails vertical mixing. Emissions from sources at the surface get trapped beneath this lid and accumulate right at ground level because the air can’t rise to dilute them. So the highest pollutant concentrations occur near the surface. As you go higher, you’re above the inversion cap, where mixing is limited and there are fewer surface emissions contributing, leading to lower concentrations.

Thermal inversions create a stable lid of warmer air above cooler air near the ground, which curtails vertical mixing. Emissions from sources at the surface get trapped beneath this lid and accumulate right at ground level because the air can’t rise to dilute them. So the highest pollutant concentrations occur near the surface. As you go higher, you’re above the inversion cap, where mixing is limited and there are fewer surface emissions contributing, leading to lower concentrations.

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