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Air Pollution Transport and How It Affects New Hampshire
A Report Prepared by the
N.H. Department of Environmental Services May 18, 2004
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How Does Air Pollution Move Around?
… With the wind
Just as weather forecasters look to where the wind is coming from to predict tomorrow’s weather, air pollution forecasters look upwind to predict tomorrow’s air quality.
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150,000
75,000
Tons Per Year of Nitrogen Oxides
Emissions
Typical Wind Patterns on Bad Air Days in the Northeast, Along with Pollution Source Locations
Arrows show winds blowing from the Ohio Valley towards New HampshireNitrogen oxides are key pollutants that cause smog
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Ozone builds during the day, beginning in upwind areas, and transports into New Hampshire late in the day
Recent Ground-Recent Ground-level Ozone level Ozone Event in the Event in the NortheastNortheast
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Air Pollution Build-up and Transport
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Satellite Observation of a Widespread Smog Event
Smog is evident over land and water, transported hundreds of miles
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Satellite Observation of Another Widespread Smog Event
Smog is transported over 700 miles offshore
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What Do You See In This Photograph?
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On a Clear Day, You Would See Mt. Jefferson
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What Is This Famous New Hampshire Landmark?
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On a Clear Day, You Would Know It’s Mt. Washington