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Featured Infographic: Weather--How Does It Fit into the Air Quality Puzzle?

Weather can significantly influence air quality conditions. Understanding this influence is essential
to protecting our health when pollutant concentrations are high. We have created this infographic
to describe the meteorological factors that affect the formation and evolution of air pollution.

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Weather and Air Quality Infographic

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Weather Infographic


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Weather: How Does It Fit Into the Air Quality Puzzle?

Predicting how air pollution levels will change over time can be a complicated process.

How far will the pollution spread?

Will it get worse?

What health precautions should be taken?

To piece the answers together these factors should be considered: emissions, solar radiation, topography, and weather.


The characteristics of polluted air depend on the type, size, and number of emitting sources.

Solar Radiation

Solar radiation causes emissions to react chemically which produces more air pollution. Nitrogen oxides (NOx) + volatile organic compounds (VOCs) = ozone.


Air pollutants can get trapped in valleys when upward air motion is inhibited by inversions.


Wind can disperse air pollutants (reduce concentrations) and/or transport pollutants far from their sources. High winds can cause fugitive dust if conditions are dry.

Low pressure is often associated with winds, clouds, and precipitation which means there are typically less pollutants. *Exception: high winds that cause fugitive dust when conditions are dry.

High pressure is often associated with calm winds and clear skies. Stagnant air = more pollutants.

Precipitation tends to wash pollutants out of the air.

High temperatures speed up the chemical reactions of air pollutants.

Increasing temperature with height characterizes and inversion (pollutants get trapped under the inversion near the ground).


Weather can significantly influence air quality conditions. Understanding this influence is essential to protecting our health when pollution levels are high.


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