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Trends in historical mercury deposition inferred from lake sediment cores across a climate gradient in the Canadian High Arctic

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dc.contributor.authorKorosi, Jennifer
dc.contributor.authorGriffiths, Katherine
dc.contributor.authorSmol, John
dc.contributor.authorBlais, Jules
dc.date.accessioned2022-07-07T18:03:51Z
dc.date.available2022-07-07T18:03:51Z
dc.date.issued2018-10
dc.description.abstractRecent climate change may be enhancing mercury fluxes to Arctic lake sediments, confounding the use of sediment cores to reconstruct histories of atmospheric deposition. Assessing the independent effects of climate warming on mercury sequestration is challenging due to temporal overlap between warming temperatures and increased long-range transport of atmospheric mercury following the Industrial Revolution. We address this challenge by examining mercury trends in short cores (the last several hundred years) from eight lakes centered on Cape Herschel (Canadian High Arctic) that span a gradient in microclimates, including two lakes that have not yet been significantly altered by climate warming due to continued ice cover. Previous research on subfossil diatoms and inferred primary production indicated the timing of limnological responses to climate warming, which, due to prevailing ice cover conditions, varied from ∼1850 to ∼1990 for lakes that have undergone changes. We show that climate warming may have enhanced mercury deposition to lake sediments in one lake (Moraine Pond), while another (West Lake) showed a strong signal of post-industrial mercury enrichment without any corresponding limnological changes associated with warming. Our results provide insights into the role of climate warming and organic carbon cycling as drivers of mercury deposition to Arctic lake sediments.en_US
dc.identifier.citationKorosi, J.B., Griffiths, K., Smol, J.P. and Blais, J.M. (2018) Trends in historical mercury deposition inferred from lake sediment cores across a climate gradient in the Canadian High Arctic. Environmental Pollution, 241: 459-467.en_US
dc.identifier.urihttps://doi.org/10.1016/j.envpol.2018.05.049en_US
dc.identifier.urihttp://hdl.handle.net/10315/39529
dc.language.isoenen_US
dc.publisherScienceDirecten_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.articlehttps://www.sciencedirect.com/science/article/abs/pii/S0269749118305049en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectResearch Subject Categories::NATURAL SCIENCESen_US
dc.subjectLakes, Mercury, Arctic, Climate Change, Ice Cover, Paleolimnologyen_US
dc.titleTrends in historical mercury deposition inferred from lake sediment cores across a climate gradient in the Canadian High Arcticen_US
dc.typeArticleen_US

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