Document Detail


Source areas of airborne 7Be and 210Pb measured in Northern Finland.
MedLine Citation:
PMID:  11089806     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Daily aerosol samples were collected at Sodankylä, Northern Finland, from July 1995 to June 1997. The filter samples were analyzed for 7Be by semiconductor gamma spectrometry and for 210Pb by alpha counting of the in-grown 210Po. The concentrations were lognormally distributed with median concentrations of 2,500 and 160 muBq m(-3) for 7Be and 210Pb, respectively. The trajectory analysis performed showed that the highest 210Pb activity concentrations were associated with continental air masses originating in Central Russia. High 7Be activity concentrations were found in air masses from Central Russia and, during springtime, also in air masses coming from southwest. The latter cases were attributed to the transfer of stratospheric air masses into the troposphere along the polar front. Slightly elevated 7Be and 210Pb concentrations were found in air masses coming to Sodankyla from northwest between 70th and 80th latitudes. This was attributed to the long-range transport from continental North America.
Authors:
J Paatero; J Hatakka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Health physics     Volume:  79     ISSN:  0017-9078     ISO Abbreviation:  Health Phys     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2000-11-30     Completed Date:  2000-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985093R     Medline TA:  Health Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  691-6     Citation Subset:  IM    
Affiliation:
Finnish Meteorological Institute, Air Quality Research Sahaajankatu, Helsinki.
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants, Radioactive / analysis*
Beryllium / analysis*
Finland
Lead Radioisotopes
Radioisotopes / analysis*
Chemical
Reg. No./Substance:
0/Air Pollutants, Radioactive; 0/Lead Radioisotopes; 0/Radioisotopes; 7440-41-7/Beryllium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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