Cloud condensation nuclei closure study on summer arctic aerosol
We present an aerosol – cloud condensation nuclei (CCN) closure study on summer high Arctic aerosol based on measurements that were carried out in 2008 during the Arctic Summer Cloud Ocean Study (ASCOS) on board the Swedish ice breaker Oden . The data presented here were collected during a three-wee...
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ftdoajarticles:oai:doaj.org/article:1738821aef0f4a2d9d9be31e3d8214d8 2023-05-15T14:56:56+02:00 Cloud condensation nuclei closure study on summer arctic aerosol M. Martin R. Y.-W. Chang B. Sierau S. Sjogren E. Swietlicki J. P. D. Abbatt C. Leck U. Lohmann 2011-11-01T00:00:00Z https://doi.org/10.5194/acp-11-11335-2011 https://doaj.org/article/1738821aef0f4a2d9d9be31e3d8214d8 EN eng Copernicus Publications http://www.atmos-chem-phys.net/11/11335/2011/acp-11-11335-2011.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-11-11335-2011 1680-7316 1680-7324 https://doaj.org/article/1738821aef0f4a2d9d9be31e3d8214d8 Atmospheric Chemistry and Physics, Vol 11, Iss 22, Pp 11335-11350 (2011) Physics QC1-999 Chemistry QD1-999 article 2011 ftdoajarticles https://doi.org/10.5194/acp-11-11335-2011 2022-12-31T16:33:11Z We present an aerosol – cloud condensation nuclei (CCN) closure study on summer high Arctic aerosol based on measurements that were carried out in 2008 during the Arctic Summer Cloud Ocean Study (ASCOS) on board the Swedish ice breaker Oden . The data presented here were collected during a three-week time period in the pack ice (>85° N) when the icebreaker Oden was moored to an ice floe and drifted passively during the most biological active period into autumn freeze up conditions. CCN number concentrations were obtained using two CCN counters measuring at different supersaturations. The directly measured CCN number concentration was then compared with a CCN number concentration calculated using both bulk aerosol mass composition data from an aerosol mass spectrometer (AMS) and aerosol number size distributions obtained from a differential mobility particle sizer, assuming κ-Köhler theory, surface tension of water and an internally mixed aerosol. The last assumption was supported by measurements made with a hygroscopic tandem differential mobility analyzer (HTDMA) for particles >70 nm. For the two highest measured supersaturations, 0.73 and 0.41%, closure could not be achieved with the investigated settings concerning hygroscopicity and density. The calculated CCN number concentration was always higher than the measured one for those two supersaturations. This might be caused by a relative larger insoluble organic mass fraction of the smaller particles that activate at these supersaturations, which are thus less good CCN than the larger particles. On average, 36% of the mass measured with the AMS was organic mass. At 0.20, 0.15 and 0.10% supersaturation, closure could be achieved with different combinations of hygroscopic parameters and densities within the uncertainty range of the fit. The best agreement of the calculated CCN number concentration with the observed one was achieved when the organic fraction of the aerosol was treated as nearly water insoluble (κ org =0.02), leading to a mean total κ, κ tot ... Article in Journal/Newspaper Arctic oden Directory of Open Access Journals: DOAJ Articles Arctic Breaker ENVELOPE(-67.257,-67.257,-67.874,-67.874) Atmospheric Chemistry and Physics 11 22 11335 11350 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 M. Martin R. Y.-W. Chang B. Sierau S. Sjogren E. Swietlicki J. P. D. Abbatt C. Leck U. Lohmann Cloud condensation nuclei closure study on summer arctic aerosol |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
We present an aerosol – cloud condensation nuclei (CCN) closure study on summer high Arctic aerosol based on measurements that were carried out in 2008 during the Arctic Summer Cloud Ocean Study (ASCOS) on board the Swedish ice breaker Oden . The data presented here were collected during a three-week time period in the pack ice (>85° N) when the icebreaker Oden was moored to an ice floe and drifted passively during the most biological active period into autumn freeze up conditions. CCN number concentrations were obtained using two CCN counters measuring at different supersaturations. The directly measured CCN number concentration was then compared with a CCN number concentration calculated using both bulk aerosol mass composition data from an aerosol mass spectrometer (AMS) and aerosol number size distributions obtained from a differential mobility particle sizer, assuming κ-Köhler theory, surface tension of water and an internally mixed aerosol. The last assumption was supported by measurements made with a hygroscopic tandem differential mobility analyzer (HTDMA) for particles >70 nm. For the two highest measured supersaturations, 0.73 and 0.41%, closure could not be achieved with the investigated settings concerning hygroscopicity and density. The calculated CCN number concentration was always higher than the measured one for those two supersaturations. This might be caused by a relative larger insoluble organic mass fraction of the smaller particles that activate at these supersaturations, which are thus less good CCN than the larger particles. On average, 36% of the mass measured with the AMS was organic mass. At 0.20, 0.15 and 0.10% supersaturation, closure could be achieved with different combinations of hygroscopic parameters and densities within the uncertainty range of the fit. The best agreement of the calculated CCN number concentration with the observed one was achieved when the organic fraction of the aerosol was treated as nearly water insoluble (κ org =0.02), leading to a mean total κ, κ tot ... |
format |
Article in Journal/Newspaper |
author |
M. Martin R. Y.-W. Chang B. Sierau S. Sjogren E. Swietlicki J. P. D. Abbatt C. Leck U. Lohmann |
author_facet |
M. Martin R. Y.-W. Chang B. Sierau S. Sjogren E. Swietlicki J. P. D. Abbatt C. Leck U. Lohmann |
author_sort |
M. Martin |
title |
Cloud condensation nuclei closure study on summer arctic aerosol |
title_short |
Cloud condensation nuclei closure study on summer arctic aerosol |
title_full |
Cloud condensation nuclei closure study on summer arctic aerosol |
title_fullStr |
Cloud condensation nuclei closure study on summer arctic aerosol |
title_full_unstemmed |
Cloud condensation nuclei closure study on summer arctic aerosol |
title_sort |
cloud condensation nuclei closure study on summer arctic aerosol |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/acp-11-11335-2011 https://doaj.org/article/1738821aef0f4a2d9d9be31e3d8214d8 |
long_lat |
ENVELOPE(-67.257,-67.257,-67.874,-67.874) |
geographic |
Arctic Breaker |
geographic_facet |
Arctic Breaker |
genre |
Arctic oden |
genre_facet |
Arctic oden |
op_source |
Atmospheric Chemistry and Physics, Vol 11, Iss 22, Pp 11335-11350 (2011) |
op_relation |
http://www.atmos-chem-phys.net/11/11335/2011/acp-11-11335-2011.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-11-11335-2011 1680-7316 1680-7324 https://doaj.org/article/1738821aef0f4a2d9d9be31e3d8214d8 |
op_doi |
https://doi.org/10.5194/acp-11-11335-2011 |
container_title |
Atmospheric Chemistry and Physics |
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11 |
container_issue |
22 |
container_start_page |
11335 |
op_container_end_page |
11350 |
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1766328988055109632 |