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-week...
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Online Access: | https://lup.lub.lu.se/record/2494329 https://doi.org/10.5194/acp-11-11335-2011 |
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ftulundlup:oai:lup.lub.lu.se:e61f7dc8-043f-478c-a5d1-a3979f35366c 2023-05-15T14:56:37+02:00 Cloud condensation nuclei closure study on summer arctic aerosol Martin, M. Chang, R. Y-W Sierau, B. Sjögren, Staffan Swietlicki, Erik Abbatt, J. P. D. Leck, C. Lohmann, U. 2011 https://lup.lub.lu.se/record/2494329 https://doi.org/10.5194/acp-11-11335-2011 eng eng Copernicus GmbH https://lup.lub.lu.se/record/2494329 http://dx.doi.org/10.5194/acp-11-11335-2011 wos:000298134200001 scopus:81255150484 Atmospheric Chemistry and Physics; 11(22), pp 11335-11350 (2011) ISSN: 1680-7324 Subatomic Physics contributiontojournal/article info:eu-repo/semantics/article text 2011 ftulundlup https://doi.org/10.5194/acp-11-11335-2011 2023-02-01T23:29:22Z 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 degrees 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 kappa-Kohler 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 (kappa(org) = 0.02), leading to a ... Article in Journal/Newspaper Arctic oden Lund University Publications (LUP) Arctic Breaker ENVELOPE(-67.257,-67.257,-67.874,-67.874) Atmospheric Chemistry and Physics 11 22 11335 11350 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Subatomic Physics |
spellingShingle |
Subatomic Physics Martin, M. Chang, R. Y-W Sierau, B. Sjögren, Staffan Swietlicki, Erik Abbatt, J. P. D. Leck, C. Lohmann, U. Cloud condensation nuclei closure study on summer arctic aerosol |
topic_facet |
Subatomic Physics |
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 degrees 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 kappa-Kohler 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 (kappa(org) = 0.02), leading to a ... |
format |
Article in Journal/Newspaper |
author |
Martin, M. Chang, R. Y-W Sierau, B. Sjögren, Staffan Swietlicki, Erik Abbatt, J. P. D. Leck, C. Lohmann, U. |
author_facet |
Martin, M. Chang, R. Y-W Sierau, B. Sjögren, Staffan Swietlicki, Erik Abbatt, J. P. D. Leck, C. Lohmann, U. |
author_sort |
Martin, M. |
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 GmbH |
publishDate |
2011 |
url |
https://lup.lub.lu.se/record/2494329 https://doi.org/10.5194/acp-11-11335-2011 |
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; 11(22), pp 11335-11350 (2011) ISSN: 1680-7324 |
op_relation |
https://lup.lub.lu.se/record/2494329 http://dx.doi.org/10.5194/acp-11-11335-2011 wos:000298134200001 scopus:81255150484 |
op_doi |
https://doi.org/10.5194/acp-11-11335-2011 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
11 |
container_issue |
22 |
container_start_page |
11335 |
op_container_end_page |
11350 |
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1766328699272036352 |