Global atmospheric budget of simple monocyclic aromatic compounds
The global atmospheric budget and distribution of monocyclic aromatic compounds is estimated, using an atmospheric chemistry general circulation model. Simulation results are evaluated with an ensemble of surface and aircraft observations with the goal of understanding emission, production and re...
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Copernicus Publications
2016-06-01
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Series: | Atmospheric Chemistry and Physics |
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doaj-1fdfecead6f14e389a2a667d37dcd4b62020-11-25T00:26:16ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-06-01166931694710.5194/acp-16-6931-2016Global atmospheric budget of simple monocyclic aromatic compoundsD. Cabrera-Perez0D. Taraborrelli1D. Taraborrelli2R. Sander3A. Pozzer4Atmospheric Chemistry Department, Max-Planck Institute of Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, GermanyAtmospheric Chemistry Department, Max-Planck Institute of Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, Germanynow at: Institute of Energy and Climate Research (IEK-8), Forschungszentrum Jülich GmbH, Jülich, GermanyAtmospheric Chemistry Department, Max-Planck Institute of Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, GermanyAtmospheric Chemistry Department, Max-Planck Institute of Chemistry, Hahn-Meitner-Weg 1, 55128 Mainz, GermanyThe global atmospheric budget and distribution of monocyclic aromatic compounds is estimated, using an atmospheric chemistry general circulation model. Simulation results are evaluated with an ensemble of surface and aircraft observations with the goal of understanding emission, production and removal of these compounds.<br><br>Anthropogenic emissions provided by the RCP database represent the largest source of aromatics in the model (≃ 23 TgC year<sup>−1</sup>) and biomass burning from the GFAS inventory the second largest (≃ 5 TgC year<sup>−1</sup>). The simulated chemical production of aromatics accounts for ≃ 5 TgC year<sup>−1</sup>. The atmospheric burden of aromatics sums up to 0.3 TgC. The main removal process of aromatics is photochemical decomposition (≃ 27 TgC year<sup>−1</sup>), while wet and dry deposition are responsible for a removal of ≃ 4 TgC year<sup>−1</sup>.<br><br>Simulated mixing ratios at the surface and elsewhere in the troposphere show good spatial and temporal agreement with the observations for benzene, although the model generally underestimates mixing ratios. Toluene is generally well reproduced by the model at the surface, but mixing ratios in the free troposphere are underestimated. Finally, larger discrepancies are found for xylenes: surface mixing ratios are not only overestimated but also a low temporal correlation is found with respect to in situ observations.https://www.atmos-chem-phys.net/16/6931/2016/acp-16-6931-2016.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
D. Cabrera-Perez D. Taraborrelli D. Taraborrelli R. Sander A. Pozzer |
spellingShingle |
D. Cabrera-Perez D. Taraborrelli D. Taraborrelli R. Sander A. Pozzer Global atmospheric budget of simple monocyclic aromatic compounds Atmospheric Chemistry and Physics |
author_facet |
D. Cabrera-Perez D. Taraborrelli D. Taraborrelli R. Sander A. Pozzer |
author_sort |
D. Cabrera-Perez |
title |
Global atmospheric budget of simple monocyclic aromatic compounds |
title_short |
Global atmospheric budget of simple monocyclic aromatic compounds |
title_full |
Global atmospheric budget of simple monocyclic aromatic compounds |
title_fullStr |
Global atmospheric budget of simple monocyclic aromatic compounds |
title_full_unstemmed |
Global atmospheric budget of simple monocyclic aromatic compounds |
title_sort |
global atmospheric budget of simple monocyclic aromatic compounds |
publisher |
Copernicus Publications |
series |
Atmospheric Chemistry and Physics |
issn |
1680-7316 1680-7324 |
publishDate |
2016-06-01 |
description |
The global atmospheric budget and distribution of monocyclic aromatic compounds is
estimated, using an atmospheric chemistry general circulation model.
Simulation results are evaluated with an ensemble of surface and aircraft observations
with the goal of understanding emission, production and removal of these compounds.<br><br>Anthropogenic emissions provided by the RCP database represent the largest
source of aromatics in the model (≃ 23 TgC year<sup>−1</sup>) and biomass burning
from the GFAS inventory the second largest (≃ 5 TgC year<sup>−1</sup>).
The simulated chemical production of aromatics accounts for ≃ 5 TgC year<sup>−1</sup>.
The atmospheric burden of aromatics sums up to 0.3 TgC.
The main removal process of aromatics is photochemical decomposition (≃ 27 TgC year<sup>−1</sup>), while wet and dry deposition are responsible for a removal of
≃ 4 TgC year<sup>−1</sup>.<br><br>Simulated mixing ratios at the surface and elsewhere in the troposphere show good spatial and
temporal agreement with the observations for benzene, although the model generally underestimates
mixing ratios. Toluene is generally well reproduced by the model at the
surface, but mixing ratios in the free troposphere are underestimated.
Finally, larger discrepancies are found for xylenes: surface
mixing ratios are not only overestimated
but also a low temporal correlation is found with respect to in situ observations. |
url |
https://www.atmos-chem-phys.net/16/6931/2016/acp-16-6931-2016.pdf |
work_keys_str_mv |
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