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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in atti di convegno anno 2015

Contributo in atti di convegno

Tipo: Poster

Titolo: Regional model evaluation of mercury deposition in Florida

Anno di pubblicazione: 2015

Formato: Cartaceo

Autori: C. N. Gencarelli, F. De Simone, I. M. Hedgecock, F. J. Marsik, J. T. Dvonch, N. Pirrone

Affiliazioni autori: CNR - Institute of Atmospheric Pollution Research, Rende, Italy University of Michigan, Air Quality Laboratory, 1415 Washington Heights, SPH 1, Ann Arbor, MI 48109-2029 USA CNR - Institute of Atmospheric Pollution Research, Rome, Italy

Autori CNR:

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

Lingua: inglese

Abstract: To evaluate and identify source-receptor relationships at local scales, and their temporal trends, a modified version of the WRF/Chem model has been developed within he GMOS project, in order to include the emissions, interactions, transport and deposition of atmospheric mercury with high spatial resolution [1]. Anthropogenic and natural (marine and from wildfires) mercury emissions have been included in this model version, and gaseous and aqueous phase oxidation were implemented, while chemical initial and boundary conditions were obtained from ECHMERIT global on-line chemical transport model [2]. Using the WRF/Chem with Hg model simulations of the atmospheric mercury cycle over Gulf of Mexico and Florida for July 2009 have been performed using emissions generated using SMOKE from the U.S. National mission Inventory [3]. Due to the continuing debate over the precise atmospheric Hg oxidation mechanism [3], simulations using a Br/BrO based Hg oxidation mechanism rather than O3/OH were performed. For the period under study the model reproduces Hg wet and dry deposition reasonably well for the more southerly Florida measurement stations, while a large overestimation was found for more central and northern stations. Moreover the model also overestimates the atmospheric Hg measurements, especially using the O3/OH oxidation mechanism. Model results show also a larger fraction of RGM in deposition compared to PBM, while relatively high values of PBM in deposition are found near the main anthropogenic emissions sources.

Lingua abstract: inglese

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • Mercury
  • Modelling
  • WRF/Chem
  • Florida

Congresso nome: 22th International Symposium on Environmental Biogeochemistry

Congresso luogo: Slovenia

Congresso data: 28 Sep - 2 Oct 2015

Congresso rilevanza: Internazionale

Congresso relazione: Contributo

Strutture CNR:

 
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