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Long term monitoring of atmospheric aerosol particles in the Antarctic Peninsula


, : Long term monitoring of atmospheric aerosol particles in the Antarctic Peninsula. Anais da Academia Brasileira de Ciencias 68(SUPPL 1): 207-222

Atmospheric aerosols were sampled continuously from December 1985 to December 1993 at the Brazilian Antarctic Station "Comandante Ferraz" (62 degree 05'S; 58 degree 23.5W). Stacked filter units fitted with 10 mu-m inlets were used to collect a total of 301 samples in the fine and coarse particle-size modes. The concentrations of 23 elements with atomic number greater than 10 were measured by Particle-Induced-X-ray Emission analysis. Average aerosol mass concentrations during summertime were 3.78 mu-g m-3 and 6.52 mu-g m-3, fine and coarse particle-size modes respectively, whereas during wintertime they were 2.92 mu-g m-3 and 5.04 mu-g m-3, fine and coarse particle-size modes. The non-sea-salt sulfur concentration in the fine particle-size mode showed clear seasonality. Non-sea-salt sulfate concentration averages on 440 ng m-3 during summer and 157 ng m-3 during wintertime. Principal factor analyses identified four different types of antarctic aerosols: sea-salt in the coarse and fine particle-size modes, soil dust and sulfates. The concentration of some trace elements like Ni, Pb and others appeared too high, indicating the existence of sources of regional or long-range transported pollution in the Antarctic Peninsula.

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