Concentration measurements of Be and Cs in ground level air in the Belgrade City area
| Autor: | Dragana Popovic, Dragana Todorović, Gordana Djuric |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Meteorology
Air pollution 010501 environmental sciences Seasonality 010403 inorganic & nuclear chemistry medicine.disease_cause Atmospheric sciences medicine.disease 01 natural sciences 0104 chemical sciences City area Ground level Washout (aeronautics) 13. Climate action medicine Environmental science Precipitation 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Environment International. 25:59-66 |
| ISSN: | 0160-4120 |
| Popis: | Concentrations of 7 Be and 137 Cs in ground level air in the city area (Belgrade, central Serbia) were determined in the period from 1991–1996. The average monthly concentrations of 7 Be in ground level air were in the range of 2–7 mBq/m 3 with pronounced one or two maxima in summer or early fall and a minimum in winter. The average air concentrations for 137 Cs were from 0.5–8.5 × 10−5 Bq/m 3 , with a spread maximum in the spring-summer period and a pronounced maximum during the winter. A general increase in 7 Be and 137 Cs concentrations during 1993 was recorded. The maximum seasonal indices were 1.3 for 7 Be (summers) and 2.7 (late springs and early summers) and 3.4 (winters) for 137 Cs. No correlation with the amount of precipitation and 137 Cs concentrations in air was determined, while the washout effect of rainfalls seems to be more closely related with variations in 7 Be concentrations. |
| Databáze: | OpenAIRE |
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