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Polar organic marker compounds in atmospheric aerosols during the LBA-SMOCC 2002 biomass burning experiment in Rondônia, Brazil: sources and source processes, time series, diel variations and size distributions

M Claeys, I Kourtchev, V Pashynska, G Vas, R Vermeylen, W Wang, Jan Cafmeyer UGent, Xuguang Chi UGent, P Artaxo, MO Andreae, et al. (2010) ATMOSPHERIC CHEMISTRY AND PHYSICS. 10(19). p.9319-9331
abstract
Measurements of polar organic marker compounds were performed on aerosols that were collected at a pasture site in the Amazon basin (Rondonia, Brazil) using a high-volume dichotomous sampler (HVDS) and a Micro-Orifice Uniform Deposit Impactor (MOUDI) within the framework of the 2002 LBA-SMOCC (Large-Scale Biosphere Atmosphere Experiment in Amazonia - Smoke Aerosols, Clouds, Rainfall, and Climate: Aerosols From Biomass Burning Perturb Global and Regional Climate) campaign. The campaign spanned the late dry season (biomass burning), a transition period, and the onset of the wet season (clean conditions). In the present study a more detailed discussion is presented compared to previous reports on the behavior of selected polar marker compounds, including levoglucosan, malic acid, isoprene secondary organic aerosol (SOA) tracers and tracers for fungal spores. The tracer data are discussed taking into account new insights that recently became available into their stability and/or aerosol formation processes. During all three periods, levoglucosan was the most dominant identified organic species in the PM2.5 size fraction of the HVDS samples. In the dry period levoglucosan reached concentrations of up to 7.5 mu g m(-3) and exhibited diel variations with a nighttime prevalence. It was closely associated with the PM mass in the size-segregated samples and was mainly present in the fine mode, except during the wet period where it peaked in the coarse mode. Isoprene SOA tracers showed an average concentration of 250 ng m(-3) during the dry period versus 157 ng m(-3) during the transition period and 52 ng m(-3) during the wet period. Malic acid and the 2-methyltetrols exhibited a different size distribution pattern, which is consistent with different aerosol formation processes (i.e., gas-to-particle partitioning in the case of malic acid and heterogeneous formation from gas-phase precursors in the case of the 2-methyltetrols). The 2-methyltetrols were mainly associated with the fine mode during all periods, while malic acid was prevalent in the fine mode only during the dry and transition periods, and dominant in the coarse mode during the wet period. The sum of the fungal spore tracers arabitol, mannitol, and erythritol in the PM2.5 fraction of the HVDS samples during the dry, transition, and wet periods was, on average, 54 ng m(-3), 34 ng m(-3), and 27 ng m(-3), respectively, and revealed minor day/night variation. The mass size distributions of arabitol and mannitol during all periods showed similar patterns and an association with the coarse mode, consistent with their primary origin. The results show that even under the heavy smoke conditions of the dry period a natural background with contributions from bioaerosols and isoprene SOA can be revealed. The enhancement in isoprene SOA in the dry season is mainly attributed to an increased acidity of the aerosols, increased NOx concentrations and a decreased wet deposition.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
AEROSOL
journal title
ATMOSPHERIC CHEMISTRY AND PHYSICS
Atmos. Chem. Phys.
volume
10
issue
19
pages
9319 - 9331
Web of Science type
Article
Web of Science id
000283066300006
JCR category
METEOROLOGY & ATMOSPHERIC SCIENCES
JCR impact factor
5.309 (2010)
JCR rank
1/68 (2010)
JCR quartile
1 (2010)
ISSN
1680-7316
DOI
10.5194/acp-10-9319-2010
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
1142899
handle
http://hdl.handle.net/1854/LU-1142899
date created
2011-02-09 10:25:13
date last changed
2018-01-29 12:18:47
@article{1142899,
  abstract     = {Measurements of polar organic marker compounds were performed on aerosols that were collected at a pasture site in the Amazon basin (Rondonia, Brazil) using a high-volume dichotomous sampler (HVDS) and a Micro-Orifice Uniform Deposit Impactor (MOUDI) within the framework of the 2002 LBA-SMOCC (Large-Scale Biosphere Atmosphere Experiment in Amazonia - Smoke Aerosols, Clouds, Rainfall, and Climate: Aerosols From Biomass Burning Perturb Global and Regional Climate) campaign. The campaign spanned the late dry season (biomass burning), a transition period, and the onset of the wet season (clean conditions). In the present study a more detailed discussion is presented compared to previous reports on the behavior of selected polar marker compounds, including levoglucosan, malic acid, isoprene secondary organic aerosol (SOA) tracers and tracers for fungal spores. The tracer data are discussed taking into account new insights that recently became available into their stability and/or aerosol formation processes. During all three periods, levoglucosan was the most dominant identified organic species in the PM2.5 size fraction of the HVDS samples. In the dry period levoglucosan reached concentrations of up to 7.5 mu g m(-3) and exhibited diel variations with a nighttime prevalence. It was closely associated with the PM mass in the size-segregated samples and was mainly present in the fine mode, except during the wet period where it peaked in the coarse mode. Isoprene SOA tracers showed an average concentration of 250 ng m(-3) during the dry period versus 157 ng m(-3) during the transition period and 52 ng m(-3) during the wet period. Malic acid and the 2-methyltetrols exhibited a different size distribution pattern, which is consistent with different aerosol formation processes (i.e., gas-to-particle partitioning in the case of malic acid and heterogeneous formation from gas-phase precursors in the case of the 2-methyltetrols). The 2-methyltetrols were mainly associated with the fine mode during all periods, while malic acid was prevalent in the fine mode only during the dry and transition periods, and dominant in the coarse mode during the wet period. The sum of the fungal spore tracers arabitol, mannitol, and erythritol in the PM2.5 fraction of the HVDS samples during the dry, transition, and wet periods was, on average, 54 ng m(-3), 34 ng m(-3), and 27 ng m(-3), respectively, and revealed minor day/night variation. The mass size distributions of arabitol and mannitol during all periods showed similar patterns and an association with the coarse mode, consistent with their primary origin. The results show that even under the heavy smoke conditions of the dry period a natural background with contributions from bioaerosols and isoprene SOA can be revealed. The enhancement in isoprene SOA in the dry season is mainly attributed to an increased acidity of the aerosols, increased NOx concentrations and a decreased wet deposition.},
  author       = {Claeys, M and Kourtchev, I and Pashynska, V and Vas, G and Vermeylen, R and Wang, W and Cafmeyer, Jan and Chi, Xuguang and Artaxo, P and Andreae, MO and Maenhaut, Willy},
  issn         = {1680-7316},
  journal      = {ATMOSPHERIC CHEMISTRY AND PHYSICS},
  keyword      = {AEROSOL},
  language     = {eng},
  number       = {19},
  pages        = {9319--9331},
  title        = {Polar organic marker compounds in atmospheric aerosols during the LBA-SMOCC 2002 biomass burning experiment in Rond{\^o}nia, Brazil: sources and source processes, time series, diel variations and size distributions},
  url          = {http://dx.doi.org/10.5194/acp-10-9319-2010},
  volume       = {10},
  year         = {2010},
}

Chicago
Claeys, M, I Kourtchev, V Pashynska, G Vas, R Vermeylen, W Wang, Jan Cafmeyer, et al. 2010. “Polar Organic Marker Compounds in Atmospheric Aerosols During the LBA-SMOCC 2002 Biomass Burning Experiment in Rondônia, Brazil: Sources and Source Processes, Time Series, Diel Variations and Size Distributions.” Atmospheric Chemistry and Physics 10 (19): 9319–9331.
APA
Claeys, M, Kourtchev, I., Pashynska, V., Vas, G., Vermeylen, R., Wang, W., Cafmeyer, J., et al. (2010). Polar organic marker compounds in atmospheric aerosols during the LBA-SMOCC 2002 biomass burning experiment in Rondônia, Brazil: sources and source processes, time series, diel variations and size distributions. ATMOSPHERIC CHEMISTRY AND PHYSICS, 10(19), 9319–9331.
Vancouver
1.
Claeys M, Kourtchev I, Pashynska V, Vas G, Vermeylen R, Wang W, et al. Polar organic marker compounds in atmospheric aerosols during the LBA-SMOCC 2002 biomass burning experiment in Rondônia, Brazil: sources and source processes, time series, diel variations and size distributions. ATMOSPHERIC CHEMISTRY AND PHYSICS. 2010;10(19):9319–31.
MLA
Claeys, M, I Kourtchev, V Pashynska, et al. “Polar Organic Marker Compounds in Atmospheric Aerosols During the LBA-SMOCC 2002 Biomass Burning Experiment in Rondônia, Brazil: Sources and Source Processes, Time Series, Diel Variations and Size Distributions.” ATMOSPHERIC CHEMISTRY AND PHYSICS 10.19 (2010): 9319–9331. Print.