气候变化领域集成服务门户(CCPortal): Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling

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DOI	10.1002/2017GB005700
	Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling
	Rosati G.; Heimbürger L.E.; Melaku Canu D.; Lagane C.; Laffont L.; Rijkenberg M.J.A.; Gerringa L.J.A.; Solidoro C.; Gencarelli C.N.; Hedgecock I.M.; De Baar H.J.W.; Sonke J.E.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	529
结束页码	550
卷号	32 期号:4
英文摘要	Redox conditions and organic matter control marine methylmercury (MeHg) production. The Black Sea is the world's largest and deepest anoxic basin and is thus ideal to study Hg species along the extended redox gradient. Here we present new dissolved Hg and MeHg data from the 2013 GEOTRACES MEDBlack cruise (GN04_leg2) that we integrated into a numerical 1-D model, to track the fate and dynamics of Hg and MeHg. Contrary to a previous study, our new data show highest MeHg concentrations in the permanently anoxic waters. Observed MeHg/Hg percentage (range 9–57%) in the anoxic waters is comparable to other subsurface maxima in oxic open-ocean waters. With the modeling we tested for various Hg methylation and demethylation scenarios along the redox gradient. The results show that Hg methylation must occur in the anoxic waters. The model was then used to simulate the time evolution (1850–2050) of Hg species in the Black Sea. Our findings quantify (1) inputs and outputs of HgT (~31 and ~28 kmol yr−1) and MeHgT (~5 and ~4 kmol yr−1) to the basin, (2) the extent of net demethylation occurring in oxic (~1 kmol yr−1) and suboxic water (~6 kmol yr−1), (3) and the net Hg methylation in the anoxic waters of the Black Sea (~11 kmol yr−1). The model was also used to estimate the amount of anthropogenic Hg (85–93%) in the Black Sea. ©2018. The Authors.
英文关键词	anoxia; GEOTRACES; mercury; methylation; methylmercury; sulfide
语种	英语
scopus关键词	anoxic conditions; environmental fate; measurement method; mercury (element); methylation; methylmercury; numerical model; one-dimensional modeling; redox conditions; sulfide; Black Sea
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129843
作者单位	OGS, National Institute of Oceanography and Experimental Geophysics, OCE Research Section, ECHO Group, Trieste, Italy; Department of Life Sciences, University of Trieste, Trieste, Italy; Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography UM 110, Marseille, France; Observatoire Midi-Pyrénées, Laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université Paul-Sabatier, Toulouse, France; NIOZ, Royal Institute for Sea Research, department of GCO, Utrecht University, Den Burg, Netherlands; ICTP, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; CNR, Institute of Atmospheric Pollution Research, Division of Rende, UNICAL-Polifunzionale, Rende, Italy
推荐引用方式 GB/T 7714	Rosati G.,Heimbürger L.E.,Melaku Canu D.,et al. Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling[J],2018,32(4).
APA	Rosati G..,Heimbürger L.E..,Melaku Canu D..,Lagane C..,Laffont L..,...&Sonke J.E..(2018).Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling.Global Biogeochemical Cycles,32(4).
MLA	Rosati G.,et al."Mercury in the Black Sea: New Insights From Measurements and Numerical Modeling".Global Biogeochemical Cycles 32.4(2018).