Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08)
Real-time mass spectra of the non-refractory species in submicron aerosol particles were recorded in a tropical rainforest in the central Amazon Basin during the wet season from February to March 2008, as a part of the Amazonian Aerosol Characterization Experiment (AMAZE-08). Organic material accoun...
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doaj-bccd296a1f80434bba81d8e2c1c3f6592020-11-24T23:22:21ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242015-04-011573687370110.5194/acp-15-3687-2015Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08)Q. Chen0D. K. Farmer1L. V. Rizzo2T. Pauliquevis3M. Kuwata4T. G. Karl5A. Guenther6J. D. Allan7H. Coe8M. O. Andreae9U. Pöschl10J. L. Jimenez11P. Artaxo12S. T. Martin13School of Engineering and Applied Sciences & Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USADepartment of Chemistry and Biochemistry & Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO, USADepartment of Natural and Earth Sciences, Federal University of São Paulo, Diadema, BrazilDepartment of Natural and Earth Sciences, Federal University of São Paulo, Diadema, BrazilSchool of Engineering and Applied Sciences & Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USANational Center for Atmospheric Research, Boulder, CO, USANational Center for Atmospheric Research, Boulder, CO, USANational Centre for Atmospheric Science & School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UKNational Centre for Atmospheric Science & School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UKBiogeochemistry and Multiphase Chemistry Departments, Max Planck Institute for Chemistry, Mainz, GermanyBiogeochemistry and Multiphase Chemistry Departments, Max Planck Institute for Chemistry, Mainz, GermanyDepartment of Chemistry and Biochemistry & Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO, USAApplied Physics Department & Atmospheric Science Department, University of São Paulo, São Paulo, BrazilSchool of Engineering and Applied Sciences & Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USAReal-time mass spectra of the non-refractory species in submicron aerosol particles were recorded in a tropical rainforest in the central Amazon Basin during the wet season from February to March 2008, as a part of the Amazonian Aerosol Characterization Experiment (AMAZE-08). Organic material accounted on average for more than 80% of the non-refractory submicron particle mass concentrations during the period of measurements. There was insufficient ammonium to neutralize sulfate. In this acidic, isoprene-rich, HO<sub>2</sub>-dominant environment, positive-matrix factorization of the time series of particle mass spectra identified four statistical factors to account for the 99% of the variance in the signal intensities of the organic constituents. The first factor was identified as associated with regional and local pollution and labeled "HOA" for its hydrocarbon-like characteristics. A second factor was associated with long-range transport and labeled "OOA-1" for its oxygenated characteristics. A third factor, labeled "OOA-2," was implicated as associated with the reactive uptake of isoprene oxidation products, especially of epoxydiols to acidic haze, fog, or cloud droplets. A fourth factor, labeled "OOA-3," was consistent with an association with the fresh production of secondary organic material (SOM) by the mechanism of gas-phase oxidation of biogenic volatile organic precursors followed by gas-to-particle conversion of the oxidation products. The suffixes 1, 2, and 3 on the OOA labels signify ordinal ranking with respect to the extent of oxidation represented by the factor. The process of aqueous-phase oxidation of water-soluble products of gas-phase photochemistry might also have been associated to some extent with the OOA-2 factor. The campaign-average factor loadings had a ratio of 1.4:1 for OOA-2 : OOA-3, suggesting the comparable importance of particle-phase compared to gas-phase pathways for the production of SOM during the study period.http://www.atmos-chem-phys.net/15/3687/2015/acp-15-3687-2015.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Q. Chen D. K. Farmer L. V. Rizzo T. Pauliquevis M. Kuwata T. G. Karl A. Guenther J. D. Allan H. Coe M. O. Andreae U. Pöschl J. L. Jimenez P. Artaxo S. T. Martin |
spellingShingle |
Q. Chen D. K. Farmer L. V. Rizzo T. Pauliquevis M. Kuwata T. G. Karl A. Guenther J. D. Allan H. Coe M. O. Andreae U. Pöschl J. L. Jimenez P. Artaxo S. T. Martin Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) Atmospheric Chemistry and Physics |
author_facet |
Q. Chen D. K. Farmer L. V. Rizzo T. Pauliquevis M. Kuwata T. G. Karl A. Guenther J. D. Allan H. Coe M. O. Andreae U. Pöschl J. L. Jimenez P. Artaxo S. T. Martin |
author_sort |
Q. Chen |
title |
Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) |
title_short |
Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) |
title_full |
Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) |
title_fullStr |
Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) |
title_full_unstemmed |
Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08) |
title_sort |
submicron particle mass concentrations and sources in the amazonian wet season (amaze-08) |
publisher |
Copernicus Publications |
series |
Atmospheric Chemistry and Physics |
issn |
1680-7316 1680-7324 |
publishDate |
2015-04-01 |
description |
Real-time mass spectra of the non-refractory species in submicron aerosol
particles were recorded in a tropical rainforest in the central Amazon Basin
during the wet season from February to March 2008, as a part of the
Amazonian Aerosol Characterization Experiment (AMAZE-08). Organic material
accounted on average for more than 80% of the non-refractory submicron
particle mass concentrations during the period of measurements. There was
insufficient ammonium to neutralize sulfate. In this acidic, isoprene-rich,
HO<sub>2</sub>-dominant environment, positive-matrix factorization of the time
series of particle mass spectra identified four statistical factors to
account for the 99% of the variance in the signal intensities of the organic
constituents. The first factor was identified as associated with regional
and local pollution and labeled "HOA" for its hydrocarbon-like
characteristics. A second factor was associated with long-range transport
and labeled "OOA-1" for its oxygenated characteristics. A third factor,
labeled "OOA-2," was implicated as associated with the reactive uptake of
isoprene oxidation products, especially of epoxydiols to acidic haze, fog, or
cloud droplets. A fourth factor, labeled "OOA-3," was consistent with
an association with the fresh production of secondary organic material (SOM)
by the mechanism of gas-phase oxidation of biogenic volatile organic
precursors followed by gas-to-particle conversion of the oxidation products.
The suffixes 1, 2, and 3 on the OOA labels signify ordinal ranking with
respect to the extent of oxidation represented by the factor. The process of
aqueous-phase oxidation of water-soluble products of gas-phase
photochemistry might also have been associated to some extent with the OOA-2
factor. The campaign-average factor loadings had a ratio of 1.4:1 for
OOA-2 : OOA-3, suggesting the comparable importance of particle-phase compared
to gas-phase pathways for the production of SOM during the study period. |
url |
http://www.atmos-chem-phys.net/15/3687/2015/acp-15-3687-2015.pdf |
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