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Perspectives on using peat records to reconstruct past atmospheric Hg levels
Chuxian Li1, Maxime Enrico2, Kevin Bishop3
1Institute of Geography and Oeschger Center for Climate Change Research, University of Bern, Bern 3012, Switzerland.
Journal of Hazardous Materials
|November 21, 2024
Summary
Peatlands act as valuable archives for atmospheric mercury (Hg) levels. Understanding peat vegetation
Area of Science:
- Environmental Science
- Geochemistry
- Ecology
Background:
- Anthropogenic mercury (Hg) emissions elevate Hg concentrations in ecosystems.
- Regional variations in atmospheric Hg highlight complex human-natural interactions.
- Peatlands offer potential as historical archives of atmospheric Hg.
Purpose of the Study:
- To enhance the use of peatlands as authentic Hg archives.
- To summarize processes influencing Hg cycling in peatlands.
- To provide recommendations for reliable Hg level reconstructions.
Main Methods:
- Literature review and synthesis of processes affecting peatland Hg cycling.
- Identification of key factors like vegetation species and primary productivity.
- Analysis of peat core data for historical Hg reconstruction.
Main Results:
- Peat vegetation species and primary productivity significantly influence Hg sequestration.
- Climatic and anthropogenic activities interact with vegetation to affect Hg cycling.
- Peat cores can reliably reconstruct past atmospheric Hg levels over long timescales.
Conclusions:
- Improving peatland Hg archive utility requires considering vegetation dynamics.
- Reliable peatland data can test hypotheses on global Hg cycling.
- This data aids in evaluating the effectiveness of the Minamata Convention.
