Environmental scientists at Harvard have discovered that the Arctic accumulation of mercury, a toxic element, is caused both by atmospheric forces and by the flow of circumpolar rivers that carry the element north into the Arctic Ocean. While the atmospheric source was previously recognized, it now appears that twice as much mercury actually comes from the rivers. The revelation implies that concentrations of the toxin may further increase as climate change continues to modify the region’s hydrological cycle and release mercury from warming Arctic soils. “The Arctic is a unique environment because it’s so remote from most anthropogenic (human-influenced) sources of mercury, yet we know that the concentrations of mercury in Arctic marine mammals are among the highest in the world,” says lead author Jenny A. Fisher, a postdoctoral fellow in Harvard’s Atmospheric Chemistry Modeling Group and the Department of Earth and Planetary Sciences (EPS). “This is dangerous to both marine life and...
- Toxic mercury, accumulating in the Arctic, springs from a hidden sourceMon, 21 May 2012, 12:35:57 EDT
- Harvard researchers warn of legacy mercury in the environmentMon, 8 Jul 2013, 14:04:52 EDT
- 'Fingerprinting' method reveals fate of mercury in Arctic snowWed, 10 Feb 2010, 17:10:48 EST
- Study shows mercury levels from products decreasing, though still at dangerous levelsTue, 6 May 2008, 16:36:25 EDT
- Mercury releases contaminate ocean fish: Dartmouth-led effort publishes major findingsMon, 3 Dec 2012, 16:35:58 EST