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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2019-218
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2019-218
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 17 Sep 2019

Submitted as: model description paper | 17 Sep 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

HR3DHG version 1: modelling the spatio-temporal dynamics of mercury in the Augusta Bay (southern Italy)

Giovanni Denaro1, Daniela Salvagio Manta2, Alessandro Borri3, Maria Bonsignore2, Davide Valenti1,4, Enza Quinci2, Andrea Cucco5, Bernardo Spagnolo4,6,7, Mario Sprovieri2, and Andrea De Gaetano3 Giovanni Denaro et al.
  • 1CNR-IRIB, Consiglio Nazionale delle Ricerche Istituto per la Ricerca e l’Innovazione Biomedica, Via Ugo La Malfa 153, I-90146 Palermo, Italy
  • 2CNR-IAS, Consiglio Nazionale delle Ricerche Istituto per lo studio degli impatti Antropici e Sostenibilità in ambiente marino, U.O.S di Capo Granitola, Via del Faro 3, I-91020 Campobello di Mazara (TP), Italy
  • 3CNR-IASI Biomathematics Laboratory, Consiglio Nazionale delle Ricerche Istituto di Analisi dei Sistemi ed Informatica "A. Ruberti", Via dei Taurini 19, I-00185 Rome, Italy
  • 4Dipartimento di Fisica e Chimica "Emilio Segrè", Università di Palermo, Group of Interdisciplinary Theoretical Physics and CNISM, Unità di Palermo, Viale delle Scienze, Ed. 18, I-90128 Palermo, Italy
  • 5CNR-IAS, Consiglio Nazionale delle Ricerche Istituto per lo studio degli impatti Antropici e Sostenibilità in ambiente marino, U.O.S. di Oristano, località Sa Mardini, I-09072 Torregrande (OR), Italy
  • 6Radiophysics Department, National Research Lobachevsky State University of Nizhni Novgorod, 23 Gagarin Avenue, Nizhni Novgorod 603950, Russia
  • 7Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Via S. Sofia 64, I-90123 Catania, Italy

Abstract. The biogeochemical dynamics of Hg, and specifically of its three species Hg0, HgII, and MeHg (elemental, inorganic, and organic, respectively) in the marine coastal area of Augusta Bay (southern Italy) have been explored by the high resolution 3D Hg (HR3DHG) model, namely an advection-diffusion-reaction model for the dissolved mercury in the seawater compartment coupled with i) a diffusion-reaction model for dissolved mercury in the pore water of sediments and ii) a sorption/de-sorption model for total mercury in the sediments. The spatio-temporal variability of dissolved and total mercury concentration both in seawater ([HgD] and [HgT]) first layers of bottom sediments ([HgsedD] and [HgsedT]), and the Hg fluxes at the boundaries of the 3D model domain have been theoretically reproduced, showing an excellent agreement with the experimental data, collected in multiple field observations during six different oceanographic cruises. The mass-balance of the different Hg species in seawater has been calculated for the Augusta Harbor, improving previous estimations. The HR3DHG model includes modules that can be implemented for specific and detailed exploration of the effects of climate change on the spatio-temporal distribution of Hg in highly contaminated coastal-marine areas.

Giovanni Denaro et al.
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Status: open (until 15 Nov 2019)
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Giovanni Denaro et al.
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Spatio-temporal dynamic model of mercury concentration - version 1 G. Denaro, A. Borri, and A. De Gaetano https://doi.org/10.5281/zenodo.3384783

Giovanni Denaro et al.
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Short summary
The HR3DHG (High-resolution 3D mercury model) investigates the spatio-temporal behavior, in seawater and marine sediments, of three mercury species (elemental, inorganic and organic mercury) in a highly polluted marine environment (Augusta bay, southern Italy). The model shows an excellent agreement with the experimental data, collected in during six different oceanographic cruises, and can be possibly used for detailed exploration of the effects of climate change on mercury distribution.
The HR3DHG (High-resolution 3D mercury model) investigates the spatio-temporal behavior, in...
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