Mercury (Hg) is emitted to the environment through natural and anthropogenic sources. Natural sources of Hg include mainly volcanoes, hydrothermal events, rock weathering, and soil and vegetation emissions (including natural forest fires). Anthropogenic sources of Hg include mainly coal combustion, smelting of metals, gold and silver mining, and chloralkali production using mercury or mercury compounds, and all human combustion processes. Since the industrial revolution anthropogenic mercury inputs exceed natural inputs by at least a factor of five
The UNEP Minamata Convention was ratified in August 2017 and aims to protect human health from mercury exposure by reducing anthropogenic, inorganic, mercury emissions. The most toxic and biomagnifying mercury species, methylmercury, is not emitted from anthropogenic or natural sources, but produced in the ocean from inorganic mercury.
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Shedding light on Arctic Mercury
New research is now shining a light on mercury cycling on the Arctic shelf.
Linear correlation between Dissolved Gaseous Mercury and Dissolved Inorganic Carbon opens new modelling perspectives
Živković and his colleagues led a close study of the mercury speciation along the 40°S GEOTRACES section.
Mercury stable isotopes constrain atmospheric pathways to the ocean
The study’s results hold promise that the implementation of anti-pollution measures under the Minamata Convention will likely result in a faster decrease of oceanic mercury levels than previously thought.
Loss of old Arctic sea ice increases methylmercury concentrations
Researchers from the SCRIPPS, the Stockholm Natural Museum and the Mediterranean Institute of Oceanography show the importance of sea ice composition on methylmercury budgets
Precise estimate of the mercury export from the Arctic to the Atlantic Ocean
Using new observations acquired during GEOTRACES Arctic cruises, a refined arctic mercury budget has been established
Arctic mercury export flux with marine particles higher than anticipated
In the ocean, the residence time of mercury (Hg), is largely driven by two removal mechanisms: evasion to the atmosphere and downward export flux with settling particles. The later was […]
Want to learn more?
Watch the talk of Dr. Katlin Bowman “Mercury biogeochemistry in the Arctic Ocean” given as part of the webinar series “Breaking the Ice Ceiling” organized by a coalition of institutions including The Arctic Institute, Women in Polar Sciences, and Women of the Arctic: