Modeling the global mercury cycle
Conference
·
OSTI ID:126389
- Univ. of California, Santa Cruz, CA (United States)
A model of the global Hg cycle is presented and applied to analyze modern Hg budgets and the link between the anthropogenic Hg emissions and historical changes in deposition as recorded in lake sediments and bogs. Terrestrial systems appear to have been the principal sink of anthropogenic Hg. However, transport into the ocean interior via mixing and scavenging is also a significant sink of Hg and likely has limited any anthropogenically-derived increase in Hg volatilization from the surface ocean to no more than 50% above natural levels. We also consider how both the increase in air pollutants during the industrial era and their recent decrease in North America may have affected atmospheric Hg scavenging and the resulting records of Hg deposition rates in lake and bog sediments.
- OSTI ID:
- 126389
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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