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Deposition processes over complex topographies: Experimental data meets atmospheric modeling.
Laura Tositti1, Beatrice Moroni2, Enrico Dinelli3
1Department of Chemistry "G. Ciamician", University of Bologna, Bologna (BO) 40126, Italy.
The Science of the Total Environment
|August 7, 2020
Summary
Atmospheric deposition in the Terni basin was assessed using radiotracers and soil analysis. Higher altitudes showed increased deposition, influenced by industrial activity and local meteorology.
Area of Science:
- Environmental Science
- Geochemistry
- Atmospheric Science
Background:
- Atmospheric deposition processes significantly impact soil geochemistry and pollutant distribution in basin valleys.
- Understanding these processes is crucial for assessing environmental contamination, especially in industrial areas.
Purpose of the Study:
- To assess atmospheric deposition processes in the Terni basin using a multidisciplinary approach.
- To investigate the influence of local meteorology and industrial activities on pollutant distribution in soils.
Main Methods:
- Collected surface soil cores along a transect across the Terni basin.
- Utilized airborne radiotracers (lead-210 and cesium-137) for deposition assessment.
- Performed extensive physico-chemical characterization of soils and analyzed local meteorological data.
Main Results:
- Observed increased deposition flux of lead-210 and cesium-137 at higher altitudes.
- Identified heterogeneous distribution of stable anthropogenic pollutants across the transect.
- Reconciled pollutant behavior with soil characteristics, seeder-feeder processes, and radiotracer concentrations using factor analysis.
Conclusions:
- Atmospheric deposition plays a significant role in shaping soil pollutant profiles in the Terni basin.
- Local industrial activities substantially impact soil profiles, modulated by atmospheric circulation and the planetary boundary layer.
- Multidisciplinary approaches integrating radiotracers, soil analysis, and modeling are effective for studying atmospheric deposition.
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