Modelling the mercury stable isotope distribution of Earth surface reservoirs: Implications for global Hg cycling
作者: Ruoyu SunMartin JiskraHelen M. AmosYanxu ZhangElsie M. SunderlandJeroen E. Sonke
作者单位: 1Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
2Observatoire Midi-Pyrénées, Laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université Paul Sabatier, Toulouse 3, France
3School of Public Health, Department of Environmental Health, Harvard University, Boston, MA, USA
4School of Atmospheric Sciences, Nanjing University, Jiangsu 210023, China
5School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
刊名: Geochimica et Cosmochimica Acta, 2018
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2018.11.036
关键词: Mercury isotopeGlobal Hg cyclingBox modelMass-dependent fractionationMass-independent fractionation
原始语种摘要: Abstract(#br)Mercury (Hg) stable isotopes are useful to understand Hg biogeochemical cycling because physical, chemical and biological processes cause characteristic Hg isotope mass-dependent (MDF) and mass-independent (MIF) fractionation. Here, source Hg isotope signatures and process-based isotope fractionation factors are integrated into a fully coupled, global atmospheric-terrestrial-oceanic box model of MDF (δ 202 Hg), odd-MIF (Δ 199 Hg) and even-MIF (Δ 200 Hg). Using this bottom-up approach, we find that the simulated Hg isotope compositions are inconsistent with the observations. We then fit the Hg isotope enrichment factors for MDF, odd-MIF and even-MIF to observational Hg isotope constraints. The MDF model suggests that atmospheric Hg 0 photo-oxidation should enrich heavy Hg...
全文获取路径: Elsevier  (合作)
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影响因子:3.884 (2012)

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关键词翻译
关键词翻译
  • fractionation 分级
  • isotope 同位素
  • cycling 循环
  • global 球状的
  • independent 独立的
  • Mercury 水星水银
  • stable 稳定的
  • mercury 
  • distribution 分布
  • Earth 地球