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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2014

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Global atmospheric cycle of mercury: A model study on the impact of oxidation mechanisms

Anno di pubblicazione: 2014

Autori: De Simone F.; Gencarelli C.N.; Hedgecock I.M.; Pirrone N.

Affiliazioni autori: Institute of Atmospheric Pollution Research (Division of Rende), Rende, Italy; Institute of Atmospheric Pollution Research, Montelibretti, Italy

Autori CNR:

  • FRANCESCO DE SIMONE
  • CHRISTIAN NATALE GENCARELLI
  • IAN MICHAEL HEDGECOCK
  • NICOLA PIRRONE

Lingua: inglese

Abstract: Mercury (Hg) is a global pollutant since its predominant atmospheric form, elemental Hg, reacts relatively slowly with the more abundant atmospheric oxidants. Comprehensive knowledge on the details of the atmospheric Hg cycle is still lacking, and in particular, there is some uncertainty regarding the atmospherically relevant reduction-oxidation reactions of mercury and its compounds. ECHMERIT is a global online chemical transport model, based on the ECHAM5 global circulation model, with a highly customisable chemistry mechanism designed to facilitate the investigation of both aqueous- and gas-phase atmospheric mercury chemistry. An improved version of the model which includes a new oceanic emission routine has been developed. Results of multiyear model simulations with full atmospheric chemistry have been used to examine the how changes to chemical mechanisms influence the model's ability to reproduce measured Hg concentrations and deposition flux patterns. The results have also been compared to simple fixed-lifetime tracer simulations to constrain the possible range of atmospheric mercury redox rates. The model provides a new and unique picture of the global cycle of mercury, in that it is online and includes a full atmospheric chemistry module. 2014 Springer-Verlag Berlin Heidelberg.

Lingua abstract: inglese

Pagine da: 4110

Pagine a: 4123

Rivista:

Environmental science and pollution research international Springer
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 0944-1344

Numero volume: 21

Numero fascicolo: 6

DOI: 10.1007/s11356-013-2451-x

Indicizzato da: Scopus [2-s2.0-84895870641]

Parole chiave:

  • Air-sea exchange
  • Deposition fluxes
  • Global
  • Mercury
  • Modelling
  • Online

URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-84895870641&partnerID=q2rCbXpz

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