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dc.contributor.authorLi, C
dc.contributor.authorSonke, JE
dc.contributor.authorLe Roux, G
dc.contributor.authorPiotrowska, N
dc.contributor.authorVan der Putten, N
dc.contributor.authorRoberts, SJ
dc.contributor.authorDaley, Tim
dc.contributor.authorRice, E
dc.contributor.authorGehrels, R
dc.contributor.authorEnrico, M
dc.contributor.authorMauquoy, D
dc.contributor.authorRoland, TP
dc.contributor.authorDe Vleeschouwer, F
dc.date.accessioned2020-11-02T15:06:18Z
dc.date.available2020-11-02T15:06:18Z
dc.date.issued2020-10-30
dc.identifier.issn2472-3452
dc.identifier.issn2472-3452
dc.identifier.otheracsearthspacechem.0c00220
dc.identifier.urihttp://hdl.handle.net/10026.1/16618
dc.description.abstract

Remote Northern Hemisphere (NH) and Southern Hemisphere (SH) lake sediment and peat records of mercury (Hg) deposition have shown a ×3 to ×5 Hg enrichment since pre-industrial times (<1880 AD), leading to the perception that global atmospheric Hg enrichment is moderate and uniform across the hemispheres. Anthropogenic Hg emissions in the NH are, however, approximately 4 times higher than those in the SH. Here, we reconstruct atmospheric Hg deposition in four remote SH peatlands and review sediment and peat Hg records from both hemispheres. We observe a ×4 all-time enrichment in SH Hg deposition from pre-anthropogenic (<1450 AD) to the late 20th-century periods, which is lower than the large ×16 all-time enrichment in NH Hg deposition. We attribute this difference to lower anthropogenic Hg emissions in the SH, and higher natural atmospheric SH Hg concentrations, supported by ×2 higher natural background Hg accumulation in SH peat records. We suggest that the higher SH natural atmospheric Hg deposition reflects the SH land-ocean distribution, and is driven by important SH marine Hg emissions. Our findings indicate that atmospheric Hg background levels and anthropogenic enrichment in both hemispheres are different and should be taken into account in international Hg assessments and environmental policy.

dc.format.extent2073-2081
dc.languageen
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.subjectmercury
dc.subjectenrichment
dc.subjectpeat
dc.subjectsediment
dc.subjectarchive
dc.subjecthemisphere
dc.subjectdeposition
dc.titleUnequal Anthropogenic Enrichment of Mercury in Earth’s Northern and Southern Hemispheres
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000592964500017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue11
plymouth.volume4
plymouth.publication-statusPublished
plymouth.journalACS Earth and Space Chemistry
dc.identifier.doi10.1021/acsearthspacechem.0c00220
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA14 Geography and Environmental Studies
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dcterms.dateAccepted2020-10-19
dc.rights.embargodate2021-10-30
dc.identifier.eissn2472-3452
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1021/acsearthspacechem.0c00220
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2020-10-30
rioxxterms.typeJournal Article/Review


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