Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds

S. Decesari, S. Fuzzi, M. C. Facchini, M. Mircea, L. Emblico, F. Cavalli, W. Maenhaut, X. Chi, G. Schkolnik, A. Falkovich, Y. Rudich, M. Claeys, V. Pashynska, G. Vas, I. Kourtchev, R. Vermeylen, A. Hoffer, M. O. Andreae, E. Tagliavini, F. Moretti & 1 others P. Artaxo

Research output: Contribution to journalArticle

176 Citations (Scopus)

Abstract

The chemical composition of carbonaceous aerosols collected during the LBA-SMOCC field experiment, conducted in Rondônia, Brazil, in 2002 during the transition from the dry to the wet season, was investigated by a suite of state-of-the-art analytical techniques. The period of most intense biomass burning was characterized by high concentrations of submicron particles rich in carbonaceous material and water-soluble organic compounds (WSOC). At the onset of the rainy period, submicron total carbon (TC) concentrations decreased by about 20 times. In contrast, the concentration of supermicron TC was fairly constant throughout the experiment, pointing to a constant emission of coarse particles from the natural background. About 6-8% of TC (9-11 % of WSOC) was speciated at the molecular level by GC-MS and liquid chromatography. Polyhydroxylated compounds, aliphatic and aromatic acids were the main classes of compounds accounted for by individual compound analysis. Functional group analysis by proton NMR and chromatographic separation on ion-exchange columns allowed characterization of ca. 50-90% of WSOC into broad chemical classes (neutral species/light acids/humic-like substances). In spite of the significant change in the chemical composition of tracer compounds from the dry to the wet period, the functional groups and the general chemical classes of WSOC changed only to a small extent. Model compounds representing size-resolved WSOC chemical composition for the different periods of the campaign are then proposed in this paper, based on the chemical characterization by both individual compound analysis and functional group analysis deployed during the LBA-SMOCC experiment. Model compounds reproduce quantitatively the average chemical structure of WSOC and can be used as best-guess surrogates in microphysical models involving organic aerosol particles over tropical areas affected by biomass burning.

Original languageEnglish
Pages (from-to)375-402
Number of pages28
JournalAtmospheric Chemistry and Physics
Volume6
Issue number2
Publication statusPublished - 2006

Fingerprint

organic compound
aerosol
functional group
experiment
chemical composition
biomass burning
water
carbon
wet season
humic acid
nuclear magnetic resonance
liquid chromatography
analytical method
ion exchange
tracer
analysis
acid
chemical
particle

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds. / Decesari, S.; Fuzzi, S.; Facchini, M. C.; Mircea, M.; Emblico, L.; Cavalli, F.; Maenhaut, W.; Chi, X.; Schkolnik, G.; Falkovich, A.; Rudich, Y.; Claeys, M.; Pashynska, V.; Vas, G.; Kourtchev, I.; Vermeylen, R.; Hoffer, A.; Andreae, M. O.; Tagliavini, E.; Moretti, F.; Artaxo, P.

In: Atmospheric Chemistry and Physics, Vol. 6, No. 2, 2006, p. 375-402.

Research output: Contribution to journalArticle

Decesari, S, Fuzzi, S, Facchini, MC, Mircea, M, Emblico, L, Cavalli, F, Maenhaut, W, Chi, X, Schkolnik, G, Falkovich, A, Rudich, Y, Claeys, M, Pashynska, V, Vas, G, Kourtchev, I, Vermeylen, R, Hoffer, A, Andreae, MO, Tagliavini, E, Moretti, F & Artaxo, P 2006, 'Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds', Atmospheric Chemistry and Physics, vol. 6, no. 2, pp. 375-402.
Decesari, S. ; Fuzzi, S. ; Facchini, M. C. ; Mircea, M. ; Emblico, L. ; Cavalli, F. ; Maenhaut, W. ; Chi, X. ; Schkolnik, G. ; Falkovich, A. ; Rudich, Y. ; Claeys, M. ; Pashynska, V. ; Vas, G. ; Kourtchev, I. ; Vermeylen, R. ; Hoffer, A. ; Andreae, M. O. ; Tagliavini, E. ; Moretti, F. ; Artaxo, P. / Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds. In: Atmospheric Chemistry and Physics. 2006 ; Vol. 6, No. 2. pp. 375-402.
@article{3008b4dca21541489f02e951201568aa,
title = "Characterization of the organic composition of aerosols from Rond{\^o}nia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds",
abstract = "The chemical composition of carbonaceous aerosols collected during the LBA-SMOCC field experiment, conducted in Rond{\^o}nia, Brazil, in 2002 during the transition from the dry to the wet season, was investigated by a suite of state-of-the-art analytical techniques. The period of most intense biomass burning was characterized by high concentrations of submicron particles rich in carbonaceous material and water-soluble organic compounds (WSOC). At the onset of the rainy period, submicron total carbon (TC) concentrations decreased by about 20 times. In contrast, the concentration of supermicron TC was fairly constant throughout the experiment, pointing to a constant emission of coarse particles from the natural background. About 6-8{\%} of TC (9-11 {\%} of WSOC) was speciated at the molecular level by GC-MS and liquid chromatography. Polyhydroxylated compounds, aliphatic and aromatic acids were the main classes of compounds accounted for by individual compound analysis. Functional group analysis by proton NMR and chromatographic separation on ion-exchange columns allowed characterization of ca. 50-90{\%} of WSOC into broad chemical classes (neutral species/light acids/humic-like substances). In spite of the significant change in the chemical composition of tracer compounds from the dry to the wet period, the functional groups and the general chemical classes of WSOC changed only to a small extent. Model compounds representing size-resolved WSOC chemical composition for the different periods of the campaign are then proposed in this paper, based on the chemical characterization by both individual compound analysis and functional group analysis deployed during the LBA-SMOCC experiment. Model compounds reproduce quantitatively the average chemical structure of WSOC and can be used as best-guess surrogates in microphysical models involving organic aerosol particles over tropical areas affected by biomass burning.",
author = "S. Decesari and S. Fuzzi and Facchini, {M. C.} and M. Mircea and L. Emblico and F. Cavalli and W. Maenhaut and X. Chi and G. Schkolnik and A. Falkovich and Y. Rudich and M. Claeys and V. Pashynska and G. Vas and I. Kourtchev and R. Vermeylen and A. Hoffer and Andreae, {M. O.} and E. Tagliavini and F. Moretti and P. Artaxo",
year = "2006",
language = "English",
volume = "6",
pages = "375--402",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
publisher = "European Geosciences Union",
number = "2",

}

TY - JOUR

T1 - Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds

AU - Decesari, S.

AU - Fuzzi, S.

AU - Facchini, M. C.

AU - Mircea, M.

AU - Emblico, L.

AU - Cavalli, F.

AU - Maenhaut, W.

AU - Chi, X.

AU - Schkolnik, G.

AU - Falkovich, A.

AU - Rudich, Y.

AU - Claeys, M.

AU - Pashynska, V.

AU - Vas, G.

AU - Kourtchev, I.

AU - Vermeylen, R.

AU - Hoffer, A.

AU - Andreae, M. O.

AU - Tagliavini, E.

AU - Moretti, F.

AU - Artaxo, P.

PY - 2006

Y1 - 2006

N2 - The chemical composition of carbonaceous aerosols collected during the LBA-SMOCC field experiment, conducted in Rondônia, Brazil, in 2002 during the transition from the dry to the wet season, was investigated by a suite of state-of-the-art analytical techniques. The period of most intense biomass burning was characterized by high concentrations of submicron particles rich in carbonaceous material and water-soluble organic compounds (WSOC). At the onset of the rainy period, submicron total carbon (TC) concentrations decreased by about 20 times. In contrast, the concentration of supermicron TC was fairly constant throughout the experiment, pointing to a constant emission of coarse particles from the natural background. About 6-8% of TC (9-11 % of WSOC) was speciated at the molecular level by GC-MS and liquid chromatography. Polyhydroxylated compounds, aliphatic and aromatic acids were the main classes of compounds accounted for by individual compound analysis. Functional group analysis by proton NMR and chromatographic separation on ion-exchange columns allowed characterization of ca. 50-90% of WSOC into broad chemical classes (neutral species/light acids/humic-like substances). In spite of the significant change in the chemical composition of tracer compounds from the dry to the wet period, the functional groups and the general chemical classes of WSOC changed only to a small extent. Model compounds representing size-resolved WSOC chemical composition for the different periods of the campaign are then proposed in this paper, based on the chemical characterization by both individual compound analysis and functional group analysis deployed during the LBA-SMOCC experiment. Model compounds reproduce quantitatively the average chemical structure of WSOC and can be used as best-guess surrogates in microphysical models involving organic aerosol particles over tropical areas affected by biomass burning.

AB - The chemical composition of carbonaceous aerosols collected during the LBA-SMOCC field experiment, conducted in Rondônia, Brazil, in 2002 during the transition from the dry to the wet season, was investigated by a suite of state-of-the-art analytical techniques. The period of most intense biomass burning was characterized by high concentrations of submicron particles rich in carbonaceous material and water-soluble organic compounds (WSOC). At the onset of the rainy period, submicron total carbon (TC) concentrations decreased by about 20 times. In contrast, the concentration of supermicron TC was fairly constant throughout the experiment, pointing to a constant emission of coarse particles from the natural background. About 6-8% of TC (9-11 % of WSOC) was speciated at the molecular level by GC-MS and liquid chromatography. Polyhydroxylated compounds, aliphatic and aromatic acids were the main classes of compounds accounted for by individual compound analysis. Functional group analysis by proton NMR and chromatographic separation on ion-exchange columns allowed characterization of ca. 50-90% of WSOC into broad chemical classes (neutral species/light acids/humic-like substances). In spite of the significant change in the chemical composition of tracer compounds from the dry to the wet period, the functional groups and the general chemical classes of WSOC changed only to a small extent. Model compounds representing size-resolved WSOC chemical composition for the different periods of the campaign are then proposed in this paper, based on the chemical characterization by both individual compound analysis and functional group analysis deployed during the LBA-SMOCC experiment. Model compounds reproduce quantitatively the average chemical structure of WSOC and can be used as best-guess surrogates in microphysical models involving organic aerosol particles over tropical areas affected by biomass burning.

UR - http://www.scopus.com/inward/record.url?scp=33645650725&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645650725&partnerID=8YFLogxK

M3 - Article

VL - 6

SP - 375

EP - 402

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 2

ER -