nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

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. (2018). Mercury in the Black Sea: new insights from measurements and numerical modeling. Global Biogeochem. Cycles 32(4): 529-550.
In: Global Biogeochemical Cycles. American Geophysical Union: Washington, DC. ISSN 0886-6236; e-ISSN 1944-9224, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Auteurs  Top 
  • Rosati, G.
  • Heimbürger, L.E.
  • Melaku Canu, D.
  • Lagane, C.
  • Laffont, L.
  • Rijkenberg, M.J.A., meer
  • Gerringa, L.J.A., meer
  • Solidoro, C.
  • Gencarelli, C.N.
  • Hedgecock, I.M.
  • de Baar, H.J.W., meer
  • Sonke, J.E.

    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.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .