Faculty of Science, Yamagata University/Faculty of Science, Yamagata University/The Graduate University for Advanced Studies, National Institute of Polar Research/National Institute of Polar Research/National Institute of Polar Research
抄録(英)
Daily aerosol samples were collected from 24 February to 14 March 1995 in Ny-Ålesund, Svalbard. The samples were analyzed for ^<210>Pb and ^<210>Po radioactivities, and the following results and conclusions were obtained. Atmospheric ^<210>Pb concentrations varied from 82.5±7.1μBq/m^3 to 1204±130μBq/m^3. According to the correlation analysis, the ^<210>Pb concentrations positively correlated to the gradient of atmospheric pressure. The result indicates that the ^<210>Pb concentrations increase as a function of air mass exchange over the Svalbard region. Residence times of the aerosols in Ny-Ålesund, which were calculated by using the ^<210>Po/^<210>Pb activity ratios, were approximately twice values obtained in the mid-latitude region. This may be the outcome of less efficient removal processes of aerosols from the atmosphere, e.g. coagulation and precipitation, owing to the low temperature conditions.
雑誌書誌ID
AA00733561
雑誌名
Memoirs of National Institute of Polar Research. Special issue
Concentrations of 210Pb and 210Po in the atmosphere of Ny-Alesund, Svalbard (scientific paper)
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KJ00000012838
(599.17KB)
概要
