Seasonal replenishment of mercury in a coastal fjord by its intermittent anoxicity |
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| Institution: | 1. Institute of Ocean Sciences, Fisheries and Oceans Canada, 9860 W. Saanich Rd., P.O. Box 6000, Sidney, BC V8L 4B2, Canada;2. Ecostat Research Ltd., 1040 Clayton Rd., N. Saanich, BC V8L 5P6, Canada;3. Metro Vancouver, 4330 Kingsway, Burnaby, BC V5H 4G8, Canada;1. College of Information Science and Electronic Engineering & Zhejiang Provincial Key Laboratory of Information Processing, Communication and Networking, Zhejiang University, Hangzhou, 310027, China;2. Xi’an Institute of Electromechanical Information Technology, Xi’an, 710065, China |
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| Abstract: | We report the first time-series of seasonal change in the concentration of mercury in sea water, and its speciation and mechanism of replenishment by sulphide chemistry in an intermittently reducing coastal fjord. We observed total Hg levels in sea water as low as 0.3 ng l−1 in the oxygenated waters of Saanich Inlet, British Columbia, as well as a correlation of seasonal buildup of Hg and sulphide in the bottom waters between March and August through diffusive supplies from the anoxic sea water/sediment interface. |
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