气候变化领域集成服务门户(CCPortal): Arctic Ocean's wintertime mercury concentrations limited by seasonal loss on the shelf

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DOI	10.1038/s41561-022-00986-3
	Arctic Ocean's wintertime mercury concentrations limited by seasonal loss on the shelf
	Kohler, Stephen G.; Heimbuerger-Boavida, Lars-Eric; Petrova, Mariia, V; Digernes, Maria G.; Sanchez, Nicolas; Dufour, Aurelie; Simic, Anica; Ndungu, Kuria; Ardelan, Murat, V
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	621
结束页码	+
卷号	15 期号:8 页码:15
英文摘要	High biota mercury levels are persisting in the Arctic, threatening ecosystem and human health. The Arctic Ocean receives large pulsed mercury inputs from rivers and the atmosphere. Yet the fate of those inputs and possible seasonal variability of mercury in the Arctic Ocean remain uncertain. Until now, seawater observations were possible only during summer and fall. Here we report polar night mercury seawater observations on a gradient from the shelf into the Arctic Ocean. We observed lower and less variable total mercury concentrations during the polar night (winter, 0.46 +/- 0.07 pmol l(-1)) compared with summer (0.63 +/- 0.19 pmol l(-1)) and no substantial changes in methylmercury concentrations (summer, 0.11 +/- 0.03 pmol l(-1) and winter, 0.12 +/- 0.04 pmol l(-1)). Seasonal changes were estimated by calculating the difference in the integrated mercury pools. We estimate losses of inorganic mercury of 208 +/- 41 pmol m(-2) d(-1) on the shelf driven by seasonal particle scavenging. Persistent methylmercury concentrations (-1 +/- 16 pmol m(-2) d(-1)) are probably driven by a lower affinity for particles and the presence of gaseous species. Our results update the current understanding of Arctic mercury cycling and require budgets and models to be reevaluated with a seasonal aspect. The mercury concentration in the Arctic Ocean is lower and less variable in winter than in summer due to seasonal loss of inorganic mercury on the shelf, according to mercury measurements along a gradient in the northern Barents Sea.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000826865700001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272605
作者单位	Norwegian University of Science & Technology (NTNU); Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Institut de Recherche pour le Developpement (IRD); UDICE-French Research Universities; Aix-Marseille Universite; Norwegian Institute for Water Research (NIVA)
推荐引用方式 GB/T 7714	Kohler, Stephen G.,Heimbuerger-Boavida, Lars-Eric,Petrova, Mariia, V,et al. Arctic Ocean's wintertime mercury concentrations limited by seasonal loss on the shelf[J],2022,15(8):15.
APA	Kohler, Stephen G..,Heimbuerger-Boavida, Lars-Eric.,Petrova, Mariia, V.,Digernes, Maria G..,Sanchez, Nicolas.,...&Ardelan, Murat, V.(2022).Arctic Ocean's wintertime mercury concentrations limited by seasonal loss on the shelf.NATURE GEOSCIENCE,15(8),15.
MLA	Kohler, Stephen G.,et al."Arctic Ocean's wintertime mercury concentrations limited by seasonal loss on the shelf".NATURE GEOSCIENCE 15.8(2022):15.