(7)Be, (210)Pb, and (210)Po in the surface air from the Arctic to Antarctica.
作者： Bertil R.R. Persson , Elis Holm
DOI: 10.1016/J.JENVRAD.2014.01.008
关键词:
摘要: In the present study we have investigated activity concentrations of (210)Pb, (210)Po as well (7)Be in surface air North and South Atlantic (1988-1989), Arctic Ocean (1991), along coastline Siberia (1994) during succeeding expeditions Swedish Polar Research program. During cruises 1991-07-28 to 1991-10-04 average air concentrations was 0.6 ± 0.4 mBq/m(3), (210)Pb 40 ± 4 μBq/m(3) (210)Po-38 ± 10 μBq/m(3). Swedish-Russian Tundra Ecology-94 expedition Siberian measured May-July were 11 ± 3, 2.4 ± 0.4 mBq/m(3), July-September they 7.2 ± 2 2.7 ± 1.1 mBq/m(3) respectively. The results from measurements concentration over vary between 75 176 μBq/m(3). In the close land masses, however, increases 269-2712 μBq/m(3). cruise down Antarctica varied 1.3 1.7 with an 1.5 ± 0.8 mBq/m(3). 6 14 μBq/m(3). At Equator recorded November 1988 630 μBq/m(3) April 1989 it 260 μBq/m(3). route Gothenburg-Montevideo 290 on return Montevideo-Gothenburg 230 μBq/m(3). 15 58 μBq/m(3). 170 70 μBq/m(3). 63 60 μBq/m(3). Antarctic 27 ± 10 μBq/m(3) 12 ± 7 μBq/m(3). All our compiled together other published data, global latitudinal distribution converted total annual deposition (Bq/m(2)/a) fitted a 4th degree polynomial. By using (210)Po/(210)Pb-activity ratio own derived.
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