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Abstract |
Abstract: Half-daily high volume aerosol particles samples have been collected onto Õlesund, Svalbard, from April +.th to May 1th cellulose and glass fiber filters at Ny-A ,**., in the framework of CHIMERPOL II program. The filters have been analyzed for ,+*Pb (,,.- y) and 1Be (/- d) by semiconductor gamma spectrometry. The median concentration values were 1* mBq m?- STP (2?,0. mBq m?- STP) for ,+*Pb, and .*. mBq m?- STP (-/?2,. mBq m?- STP) for 1Be respectively. The 1Be and ,+*Pb activity concentrations measured are relatively “low” compared to those measured in Svalbard and in other Arctic sites for the same period time (April?May) during previous studies.
The ,+*Pb atmospheric concentration and atmospheric pressure are positively cor-
related, which may indicate that the ,+*Pb atmospheric concentration increase as a
function of air mass exchange over the Svalbard region. The results of 1Be and ozone concentrations show also the absence of direct 1Be stratospheric injections during our sampling campaign, in the low troposheric air masses. The performed backward trajectory analysis showed that collected aerosols and associated radionuclides concentrations were associated to three di#erent air masses, originating from Atlantic ocean, Artic ocean and Barents Sea, and continental areas (North Finland?Russia) respectively. |
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