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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2015

Contributo in rivista

Tipo: Articolo in rivista

Titolo: A model study of global mercury deposition from biomass burning

Anno di pubblicazione: 2015

Formato: Elettronico

Autori: De Simone F., Cinnirella S., Gencarelli C., Yang X., Hedgecock I., Pirrone N,

Affiliazioni autori: CNR-IIA

Autori CNR:

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

Lingua: inglese

Abstract: Mercury emissions from biomass burning are not well characterized and can differ significantly from year to year. This study utilizes three recent biomass burning inventories (FINNv1.0, GFEDv3.1, and GFASv1.0) and the global Hg chemistry model, ECHMERIT, to investigate the annual variation of Hg emissions, and the geographical distribution and magnitude of the resulting Hg deposition fluxes. The roles of the Hg/CO enhancement ratio, the emission plume injection height, the Hg(g) 0 oxidation mechanism and lifetime, the inventory chosen, and the uncertainties with each were considered. The greatest uncertainties in the total Hg deposition were found to be associated with the Hg/CO enhancement ratio and the emission inventory employed. Deposition flux distributions proved to be more sensitive to the emission inventory and the oxidation mechanism chosen, than all the other model parametrizations. Over 75% of Hg emitted from biomass burning is deposited to the world's oceans, with the highest fluxes predicted in the North Atlantic and the highest total deposition in the North Pacific. The net effect of biomass burning is to liberate Hg from lower latitudes and disperse it toward higher latitudes where it is eventually deposited.

Lingua abstract: inglese

Pagine da: 6712

Pagine a: 6721

Rivista:

Environmental science & technology American Chemical Society,
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1520-5851

Numero volume: 49

DOI: 10.1021/acs.est.5b00969

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • Gaseous Elemental Mercury
  • Emission
  • Deposition

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