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Surface air concentration and deposition of lead-210 in French Guiana: two years of continuous monitoring
- Source :
-
Journal of Environmental Radioactivity . Mar2003, Vol. 66 Issue 3, p261. 9p. - Publication Year :
- 2003
-
Abstract
- To make up for the lack of data on 210Pb aerosol deposition in tropical regions and to use this radionuclide as an aerosol tracer, a monitoring station was run for two years at Petit-Saut, French Guiana. Lead-210 concentration in air at ground level was monitored continuously together with atmospheric total deposition. The air concentration has a mean value of 0.23±0.02 mBq m−3 during both wet and dry seasons, and it is only weakly affected by the precipitation mechanism. This result was unexpected in a wet tropical region, with a high precipitation rate. In contrast, deposition clearly correlates with precipitation for low/moderate rainfall (<15 cm per 15-day), while this correlation is masked by strong fluctuations at high rainfall. The estimated mean annual deposition over the last ten years is 163±75 Bq m−2 y−1. This provides a procedure for estimating this mean flux at other sites in French Guiana. [Copyright &y& Elsevier]
- Subjects :
- *RADIOISOTOPES
*PRECIPITATION (Chemistry)
Subjects
Details
- Language :
- English
- ISSN :
- 0265931X
- Volume :
- 66
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Radioactivity
- Publication Type :
- Academic Journal
- Accession number :
- 9164775
- Full Text :
- https://doi.org/10.1016/S0265-931X(02)00111-X