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The Impact of Black Carbon on Arctic Climate - Atmospheric Chemistry

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5.2. BC source regi<strong>on</strong>s<br />

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a<br />

b<br />

BB enhancement/background burden, % BB enhancement/background burden, %<br />

300<br />

300<br />

250<br />

April 2008 250<br />

April 2003-2007<br />

200<br />

150<br />

Gas phase<br />

Aerosol<br />

200<br />

150<br />

100<br />

100<br />

50<br />

50<br />

0<br />

CO<br />

Acet<strong>on</strong>itrile<br />

Benzene<br />

Methanol<br />

Propane<br />

Acet<strong>on</strong>e<br />

N-pentane<br />

Aerosol sulfate<br />

Aerosol mass<br />

Aerosol organics<br />

BC<br />

0<br />

CO<br />

Acet<strong>on</strong>itrile<br />

Benzene<br />

Methanol<br />

Propane<br />

Acet<strong>on</strong>e<br />

N-pentane<br />

Aerosol sulfate<br />

Aerosol mass<br />

Aerosol organics<br />

<br />

<br />

<br />

BC<br />

32

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