Light-absorbing carbon in Europe - measurement and modelling, with a focus on residential wood combustion emissions
Artikel i vetenskaplig tidskrift, 2013

The atmospheric concentration of elemental carbon (EC) in Europe during the six-year period 2005-2010 has been simulated with the EMEP MSC-W model. The model bias compared to EC measurements was less than 20% for most of the examined sites. The model results suggest that fossil fuel combustion is the dominant source of EC in most of Europe but that there are important contributions also from residential wood burning during the cold seasons and, during certain episodes, also from open biomass burning (wildfires and agricultural fires). The modelled contributions from open biomass fires to ground level concentrations of EC were small at the sites included in the present study, <3% of the long-term average of EC in PM10. The modelling of this EC source is subject to many uncertainties, and it was likely underestimated for some episodes. EC measurements and modelled EC were also compared to optical measurements of black carbon (BC). The relationships between EC and BC (as given by mass absorption cross section, MAC, values) differed widely between the sites, and the correlation between observed EC and BC is sometimes poor, making it difficult to compare results using the two techniques and limiting the comparability of BC measurements to model EC results. A new bottom-up emission inventory for carbonaceous aerosol from residential wood combustion has been applied. For some countries the new inventory has substantially different EC emissions compared to earlier estimates. For northern Europe the most significant changes are much lower emissions in Norway and higher emissions in neighbouring Sweden and Finland. For Norway and Sweden, comparisons to source-apportionment data from winter campaigns indicate that the new inventory may improve model-calculated EC from wood burning. Finally, three different model setups were tested with variable atmospheric lifetimes of EC in order to evaluate the model sensitivity to the assumptions regarding hygroscopicity and atmospheric ageing of EC. The standard ageing scheme leads to a rapid transformation of the emitted hydrophobic EC to hygroscopic particles, and generates similar results when assuming that all EC is aged at the point of emission. Assuming hydrophobic emissions and no ageing leads to higher EC concentrations. For the more remote sites, the observed EC concentration was in between the modelled EC using standard ageing and the scenario treating EC as hydrophobic. This could indicate too-rapid EC ageing in the model in relatively clean parts of the atmosphere.

BLACK-CARBON

ABSORPTION-COEFFICIENT

SOURCE APPORTIONMENT

REACTIVE NITROGEN

ELEMENTAL CARBON

AIR-POLLUTION

PARTICULATE MATTER

ORGANIC-CARBON

SIZE-SEGREGATED CHARACTERIZATION

SOOT PARTICLES

Författare

J. Genberg

Lunds universitet

Denier H. A. C. van der Gon

Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO)

David Simpson

Chalmers, Rymd- och geovetenskap, Global miljömätteknik

Meteorologisk institutt

E. Swietlicki

Lunds universitet

H. Areskoug

Stockholms universitet

D. Beddows

School of Geography, Earth and Environmental Sciences, University of Birmingham

D. Ceburnis

National University of Ireland Galway

M. Fiebig

Norsk institutt for luftforskning (NILU)

H. C. Hansson

Stockholms universitet

R. M. Harrison

King Abdulaziz University

School of Geography, Earth and Environmental Sciences, University of Birmingham

S. G. Jennings

National University of Ireland Galway

S. Saarikoski

Finnish Meteorological Institute

G. Spindler

Leibniz Institute for Tropospheric Research

A. J. H. Visschedijk

Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO)

A. Wiedensohler

Leibniz Institute for Tropospheric Research

K. E. Yttri

Norsk institutt for luftforskning (NILU)

Robert Bergström

Göteborgs universitet

SMHI

Atmospheric Chemistry and Physics

1680-7316 (ISSN) 1680-7324 (eISSN)

Vol. 13 17 8719-8738

ModElling the Regional and Global Earth system (MERGE)

Lunds universitet (9945095), 2010-01-01 -- .

Drivkrafter

Hållbar utveckling

Ämneskategorier

Meteorologi och atmosfärforskning

Styrkeområden

Energi

Fundament

Grundläggande vetenskaper

DOI

10.5194/acp-13-8719-2013

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Senast uppdaterat

2024-10-14