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Sensitivity model study of regional mercury dispersion in the atmosphere

Gencarelli, Christian N. and Bieser, Johannes and Carbone, Francesco and De Simone, Francesco and Hedgecock, Jan M. and Matthias, Volker and Travnikov, Oleg and Xin, Yang and Pirrone, Nicola (2017) Sensitivity model study of regional mercury dispersion in the atmosphere. Atmospheric Chemistry and Physics, 17 (1), pp. 627-643. Copernicus Publications. DOI: 10.5194/acp-17-627-2017 ISSN 1680-7316

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Official URL: http://www.atmos-chem-phys.net/17/627/2017/

Abstract

Atmospheric deposition is the most important pathway by which Hg reaches marine ecosystems, where it can be methylated and enter the base of food chain. The deposition, transport and chemical interactions of atmospheric Hg have been simulated over Europe for the year 2013 in the framework of the Global Mercury Observation System (GMOS) project, performing 14 different model sensitivity tests using two high-resolution three-dimensional chemical transport models (CTMs), varying the anthropogenic emission datasets, atmospheric Br input fields, Hg oxidation schemes and modelling domain boundary condition input. Sensitivity simulation results were compared with observations from 28 monitoring sites in Europe to assess model performance and particularly to analyse the influence of anthropogenic emission speciation and the Hg0(g) atmospheric oxidation mechanism. The contribution of anthropogenic Hg emissions, their speciation and vertical distribution are crucial to the simulated concentration and deposition fields, as is also the choice of Hg0(g) oxidation pathway. The areas most sensitive to changes in Hg emission speciation and the emission vertical distribution are those near major sources, but also the Aegean and the Black seas, the English Channel, the Skagerrak Strait and the northern German coast. Considerable influence was found also evident over the Mediterranean, the North Sea and Baltic Sea and some influence is seen over continental Europe, while this difference is least over the north-western part of the modelling domain, which includes the Norwegian Sea and Iceland. The Br oxidation pathway produces more HgII(g) in the lower model levels, but overall wet deposition is lower in comparison to the simulations which employ an O3 ∕ OH oxidation mechanism. The necessity to perform continuous measurements of speciated Hg and to investigate the local impacts of Hg emissions and deposition, as well as interactions dependent on land use and vegetation, forests, peat bogs, etc., is highlighted in this study.

Item URL in elib:https://elib.dlr.de/105752/
Document Type:Article
Title:Sensitivity model study of regional mercury dispersion in the atmosphere
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gencarelli, Christian N.CNR-Institute of Atmospheric Pollution Research, Rende, ItalyUNSPECIFIED
Bieser, JohannesDLR, IPAUNSPECIFIED
Carbone, FrancescoCNR-Institute of Atmospheric Pollution Research, Rende, ItalyUNSPECIFIED
De Simone, FrancescoCNR-Institute of Atmospheric Pollution Research, Rende, ItalyUNSPECIFIED
Hedgecock, Jan M.CNR-Institute of Atmospheric Pollution Research, Rende, ItalyUNSPECIFIED
Matthias, VolkerInstitute of Coastal Research, Helmoltz-Zentrum Geesthacht, Geestacht, GermanyUNSPECIFIED
Travnikov, OlegMeteorological Synthesizing Centre, Moscow, RussiaUNSPECIFIED
Xin, YangBritish Antarctic Survey,Cambridge,United KingdomUNSPECIFIED
Pirrone, NicolaCNR-Institute of Atmospheric Pollution Research, Monterotondo, Rome, ItalyUNSPECIFIED
Date:17 January 2017
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:17
DOI :10.5194/acp-17-627-2017
Page Range:pp. 627-643
Publisher:Copernicus Publications
ISSN:1680-7316
Status:Published
Keywords:Mercury, Deposition, Regional Modelling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Righi, Dr. Mattia
Deposited On:19 Aug 2016 14:56
Last Modified:02 May 2019 14:05

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