Historical variations of mercury stable isotope ratios in Arctic glacier firn and ice cores

The concentration and isotopic composition of mercury (Hg) were determined in glacier core samples from Canadian Arctic ice caps dating from preindustrial to recent time (early 21st century). Mean Hg levels increased from ≤ 0.2 ng L−1 in preindustrial time to ~0.8–1.2 ng L−1 in the modern industrial...

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Veröffentlicht in:	Global biogeochemical cycles 2016-09, Vol.30 (9), p.1324-1347
Hauptverfasser:	Zdanowicz, C. M., Krümmel, E. M., Poulain, A. J., Yumvihoze, E., Chen, J., Štrok, M., Scheer, M., Hintelmann, H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Accumulation Air pollution Arctic Arctic glaciers Arctic ice Arctic snow Atmosphere Atmospheric composition Atmospheric mercury Atmospheric models Atmospheric precipitations Biogeochemical cycle Biogeochemical cycles Biogeochemistry Burning Centuries Chemical analysis Chemical composition Chronology Coal Coal mines Coal mining Combustion Cores Depletion Earth Science with specialization in Environmental Analysis Ecosystems Emissions Environmental impact Firn Geovetenskap med inriktning mot miljöanalys Glaciers Heavy metals Ice Ice accumulation Ice caps Ice cores Industrial areas Industrial emissions Information dissemination Isotope composition Isotope ratios Isotopes Language Latitude Marine Mathematical models Mercury Mercury (planet) Mercury in snow Mercury surface Metals Mining Ores Polar glaciers Precipitation Properties Ratios Remote regions Seawater Snow Snow and ice Stable isotopes Water analysis Wildlife
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Zusammenfassung:	The concentration and isotopic composition of mercury (Hg) were determined in glacier core samples from Canadian Arctic ice caps dating from preindustrial to recent time (early 21st century). Mean Hg levels increased from ≤ 0.2 ng L−1 in preindustrial time to ~0.8–1.2 ng L−1 in the modern industrial era (last ~200 years). Hg accumulated on Arctic ice caps has Δ199Hg and Δ201Hg that are higher (~ −1 to 2.9‰) than previously reported for Arctic snow impacted by atmospheric Hg depletion events (mostly
ISSN:	0886-6236 1944-9224 1944-9224
DOI:	10.1002/2016GB005411