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| Titel |
Indoor radon periodicities and their physical constraints: a study in the Coimbra region (Central Portugal) |
| VerfasserIn |
L. J. P. F. Neves, S. M. Barbosa, A. J. S. C. Pereira |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250023546
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| Zusammenfassung |
| Indoor radon activity was measured during a period of 6 months, as well as several physical environmental variables, including temperature, pressure, humidity and rainfall; the location was a small room at an administrative building of the University of Coimbra, usually undisturbed by human activities and situated over a bedrock of low-uranium Triassic red sandstones. A low average activity of radon was observed (36 Bq.m-3), however showing a very well marked daily periodicity (10±5 Bq.m-3), with maximum values attained more frequently between 9 and 10 a.m. Daily variations are examined in terms of eventual tidal signatures and association to environmental parameters, and show the strongest correlation with outdoor temperature; no dependence on barometric pressure was found. Rainfall disturbs the normal daily radon cicles observed, by strongly reducing their amplitude, but has no effect on radon long-term variability. |
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