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- Title
Quantifying fine-scale variability in pollutant deposition in complex terrain using 210Pb inventories in soil
- Authors
Leith, I. D.; Crossley, A.; Moghaddam, M.; Smith, R. I.; Branford, D. W.; Mourne, R. W.; Fowler, D.
- Abstract
The accumulation of Pb-210 in organic material within the surface (0to 20 cm depth) horizons of soil is used to quantify local variability in the atmospheric inputs through wet deposition, cloud droplet deposition and dry deposition of aerosols. The method has been applied to quantify the long-term (similar to 50 yr) average enhancement in deposition as a consequence of orographic effects on a 800 m mountain in southwest Scotland. The Pb-210 inventory increases by a factor of 2.5 up the hillslope and is comparable to the modeled increase in wetdeposition of major ions, and larger than the increase in rainfall with altitude by a factor of two. A second study sire examined the increase in deposition beneath a Norway spruce canopy relative to open grassland at an elevation of 450 m in the Scottish Borders. The inventory of Pb-210 under the forest canopy exceeded that in the grassland by approximately 35 %, in good agreement with deposition estimates obtained from a continuous record of cloud frequency and meteorologicalvariables.
- Subjects
SCOTLAND; BIOGEOCHEMISTRY; FORESTS &; forestry; ATMOSPHERIC deposition
- Publication
Water, Air & Soil Pollution, 1998, Vol 105, Issue 1-2, p459
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/a:1005043829181