Abstract
Measurements at Barrow during the second Arctic Gas and Aerosol Sampling Program (AGASP-II), conducted in April 1986, showed no rapid long-range transport from lower-latitude source regions to Barrow, and only limited vertical transport from above the boundary layer to the surface. New aerosol size distribution measurements in the 0.005–0.1 μm diameter size range using a Nuclepore-filter diffusion battery apparatus showed a median diameter of about 0.01 μm during times of high condensation nucleus (CN) concentrations. Aerosol black carbon concentrations exceeding 400 ng m−3 were detected at the surface and were more strongly correlated with CN concentrations than with aerosol scattering extinction (σsp), suggesting that aerosol carbon was generally associated with small particles rather than large particles. Measurements at Barrow during AGASP-I, conducted in March–April 1983, showed a series of aerosol events detected at the ground that were caused by rapid long-range transport paths to the vicinity of Barrow from Eurasia. These events were strongly correlated with aerosol loading in the vertical column (optical depth).
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Bodhaine, B.A., Dutton, E.G., DeLuisi, J.J. et al. Surface aerosol measurements at Barrow during AGASP-II. J Atmos Chem 9, 213–224 (1989). https://doi.org/10.1007/BF00052833
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DOI: https://doi.org/10.1007/BF00052833