Modeling mercury isotopic fractionation in the atmosphere.
GEOS-Chem
Isotope model
Mercury isotope
Total gaseous mercury
Journal
Environmental pollution (Barking, Essex : 1987)
ISSN: 1873-6424
Titre abrégé: Environ Pollut
Pays: England
ID NLM: 8804476
Informations de publication
Date de publication:
15 Aug 2022
15 Aug 2022
Historique:
received:
18
12
2021
revised:
30
05
2022
accepted:
03
06
2022
pubmed:
11
6
2022
medline:
24
6
2022
entrez:
10
6
2022
Statut:
ppublish
Résumé
Mercury (Hg) stable isotope analysis has become a powerful tool to identify Hg sources and to understand its biogeochemical processes. However, it is challenging to link the observed Hg isotope fractionation to its global cycling. Here, we integrate source Hg isotope signatures and process-based Hg isotope fractionation into a three-dimensional isotope model based on the GEOS-Chem model platform. Our simulated isotope compositions of total gaseous Hg (TGM) are broadly comparable with available observations across global regions. The isotope compositions of global TGM, potentially distinguishable over different regions, are caused by the atmospheric mixture of anthropogenic, natural, and re-emitted Hg sources, superimposed with competing processes, notably gaseous Hg(0) dry deposition and Hg redox transformations. We find that Hg(0) dry deposition has a great impact on the isotope compositions of global TGM and drives the seasonal variation of δ
Identifiants
pubmed: 35688392
pii: S0269-7491(22)00802-8
doi: 10.1016/j.envpol.2022.119588
pii:
doi:
Substances chimiques
Gases
0
Isotopes
0
Mercury Isotopes
0
Mercury
FXS1BY2PGL
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
119588Informations de copyright
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