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Tropospheric Pollution Part II:Aerosols - Atmospheric and Oceanic ...

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Box model - Sulfur over the eastern U.S.<br />

• Amount of a constituent is a reservoir (kg)<br />

• The flux of a constituent from one reservoir to<br />

another is given in (kg/s)<br />

• 1 Tg = 10^6 tons (the mass of a million cars)<br />

• Smokestacks <strong>and</strong> vehicles in the eastern U.S.<br />

emit 12 Tg S/yr (flux into the atmospheric<br />

reservoir)<br />

• ~8 Tg S/yr fall back to the ground as acid rain<br />

(flux out of the atmospheric reservoir)

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