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Decadal trends in aerosol chemical composition at Barrow, AK: 1976–2008

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Fig. 1. Monthly averaged values from 1976–1977 and 1997–2008 for (a) nss SO = 4 and (b) ncV.
Fig. 2. Concentrations of (a) nss SO = 4 and (b) ncV averaged over the haze season (Jan–Apr) and (c) the nss SO = 4 to ncV ratio
Fig. 3. A comparison of ncV versus ncMn from Barrow (2003–2008) with values previously reported by Rahn (1981) for the North American Arctic (Barrow and Mould Bay), the Norwegian Arctic (Bear Island and Spitsbergen), Europe, and the N.E
Fig. 4. Values of (a) nss SO = 4 , (b) NH + 4 , (c), NH 4 + /nss SO = 4 molar ratio and (d) Cl − /Na + molar ratio averaged over the haze season (Jan–Apr) at Barrow
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