Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic
A critical parameter for the atmospheric lifetime of black carbon (BC) aerosols, and hence for the range over which the particles can be transported, is the aging time, i.e. the time before the aerosols become available for removal by wet deposition. This study compares two different parameterizatio...
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ftdoajarticles:oai:doaj.org/article:74461ba2eab44e44a17f2cb0d8022cdb 2023-05-15T14:53:09+02:00 Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic M. T. Lund T. Berntsen 2012-08-01T00:00:00Z https://doi.org/10.5194/acp-12-6999-2012 https://doaj.org/article/74461ba2eab44e44a17f2cb0d8022cdb EN eng Copernicus Publications http://www.atmos-chem-phys.net/12/6999/2012/acp-12-6999-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-6999-2012 1680-7316 1680-7324 https://doaj.org/article/74461ba2eab44e44a17f2cb0d8022cdb Atmospheric Chemistry and Physics, Vol 12, Iss 15, Pp 6999-7014 (2012) Physics QC1-999 Chemistry QD1-999 article 2012 ftdoajarticles https://doi.org/10.5194/acp-12-6999-2012 2022-12-31T04:12:31Z A critical parameter for the atmospheric lifetime of black carbon (BC) aerosols, and hence for the range over which the particles can be transported, is the aging time, i.e. the time before the aerosols become available for removal by wet deposition. This study compares two different parameterizations of BC aging in the chemistry transport model OsloCTM2: (i) A bulk parameterization (BULK) where aging is represented by a constant transfer to hydrophilic mode and (ii) a microphysical module (M7) where aging occurs through particle interaction and where the particle size distribution is accounted for. We investigate the effect of including microphysics on the distribution of BC globally and in the Arctic. We also focus on the impact on estimated contributions to Arctic BC from selected emission source regions. With more detailed microphysics (M7) there are regional and seasonal variations in aging. The aging is slower during high-latitude winter, when the production of sulfate is lower, than in lower latitudes and during summer. High-latitude concentrations of BC are significantly increased during winter compared to BULK. Furthermore, M7 improves the model performance at Arctic surface stations, especially the accumulation of BC during winter. A proper representation of vertical BC load is important because the climate effects of the aerosols depend on their altitude in the atmosphere. Comparisons with measured vertical profiles indicate that the model generally overestimates the BC load, particularly at higher altitudes, and this overestimation is exacerbated with M7 compared to BULK. Both parameterizations show that north of 65° N emissions in Europe contribute most to atmospheric BC concentration and to BC in snow and ice. M7 leads to a pronounced seasonal pattern in contributions and contributions from Europe and Russia increase strongly during winter relative to BULK. There is generally an increase in the amount of BC in snow and ice with M7 compared to BULK. However, in regions where the concentration of BC ... Article in Journal/Newspaper Arctic black carbon Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 12 15 6999 7014 |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 M. T. Lund T. Berntsen Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
A critical parameter for the atmospheric lifetime of black carbon (BC) aerosols, and hence for the range over which the particles can be transported, is the aging time, i.e. the time before the aerosols become available for removal by wet deposition. This study compares two different parameterizations of BC aging in the chemistry transport model OsloCTM2: (i) A bulk parameterization (BULK) where aging is represented by a constant transfer to hydrophilic mode and (ii) a microphysical module (M7) where aging occurs through particle interaction and where the particle size distribution is accounted for. We investigate the effect of including microphysics on the distribution of BC globally and in the Arctic. We also focus on the impact on estimated contributions to Arctic BC from selected emission source regions. With more detailed microphysics (M7) there are regional and seasonal variations in aging. The aging is slower during high-latitude winter, when the production of sulfate is lower, than in lower latitudes and during summer. High-latitude concentrations of BC are significantly increased during winter compared to BULK. Furthermore, M7 improves the model performance at Arctic surface stations, especially the accumulation of BC during winter. A proper representation of vertical BC load is important because the climate effects of the aerosols depend on their altitude in the atmosphere. Comparisons with measured vertical profiles indicate that the model generally overestimates the BC load, particularly at higher altitudes, and this overestimation is exacerbated with M7 compared to BULK. Both parameterizations show that north of 65° N emissions in Europe contribute most to atmospheric BC concentration and to BC in snow and ice. M7 leads to a pronounced seasonal pattern in contributions and contributions from Europe and Russia increase strongly during winter relative to BULK. There is generally an increase in the amount of BC in snow and ice with M7 compared to BULK. However, in regions where the concentration of BC ... |
format |
Article in Journal/Newspaper |
author |
M. T. Lund T. Berntsen |
author_facet |
M. T. Lund T. Berntsen |
author_sort |
M. T. Lund |
title |
Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
title_short |
Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
title_full |
Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
title_fullStr |
Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
title_full_unstemmed |
Parameterization of black carbon aging in the OsloCTM2 and implications for regional transport to the Arctic |
title_sort |
parameterization of black carbon aging in the osloctm2 and implications for regional transport to the arctic |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-6999-2012 https://doaj.org/article/74461ba2eab44e44a17f2cb0d8022cdb |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic black carbon |
genre_facet |
Arctic black carbon |
op_source |
Atmospheric Chemistry and Physics, Vol 12, Iss 15, Pp 6999-7014 (2012) |
op_relation |
http://www.atmos-chem-phys.net/12/6999/2012/acp-12-6999-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-6999-2012 1680-7316 1680-7324 https://doaj.org/article/74461ba2eab44e44a17f2cb0d8022cdb |
op_doi |
https://doi.org/10.5194/acp-12-6999-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
15 |
container_start_page |
6999 |
op_container_end_page |
7014 |
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1766324564764131328 |