On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration
We present direct eddy covariance measurements of aerosol number fluxes, dominated by sub-50 nm particles, at the edge of an ice floe drifting in the central Arctic Ocean. The measurements were made during the ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in August 2008 betwee...
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ftdoajarticles:oai:doaj.org/article:b7142ef235a24db1af7dce1ad66d9652 2023-05-15T14:51:40+02:00 On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration A. Held I. M. Brooks C. Leck M. Tjernström 2011-04-01T00:00:00Z https://doi.org/10.5194/acp-11-3093-2011 https://doaj.org/article/b7142ef235a24db1af7dce1ad66d9652 EN eng Copernicus Publications http://www.atmos-chem-phys.net/11/3093/2011/acp-11-3093-2011.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-11-3093-2011 1680-7316 1680-7324 https://doaj.org/article/b7142ef235a24db1af7dce1ad66d9652 Atmospheric Chemistry and Physics, Vol 11, Iss 7, Pp 3093-3105 (2011) Physics QC1-999 Chemistry QD1-999 article 2011 ftdoajarticles https://doi.org/10.5194/acp-11-3093-2011 2022-12-31T11:20:24Z We present direct eddy covariance measurements of aerosol number fluxes, dominated by sub-50 nm particles, at the edge of an ice floe drifting in the central Arctic Ocean. The measurements were made during the ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in August 2008 between 2°–10° W longitude and 87°–87.5° N latitude. The median aerosol transfer velocities over different surface types (open water leads, ice ridges, snow and ice surfaces) ranged from 0.27 to 0.68 mm s −1 during deposition-dominated episodes. Emission periods were observed more frequently over the open lead, while the snow behaved primarily as a deposition surface. Directly measured aerosol fluxes were compared with particle deposition parameterizations in order to estimate the emission flux from the observed net aerosol flux. Finally, the contribution of the open lead particle source to atmospheric variations in particle number concentration was evaluated and compared with the observed temporal evolution of particle number. The direct emission of aerosol particles from the open lead can explain only 5–10% of the observed particle number variation in the mixing layer close to the surface. Article in Journal/Newspaper Arctic Arctic Ocean Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Breaker ENVELOPE(-67.257,-67.257,-67.874,-67.874) Atmospheric Chemistry and Physics 11 7 3093 3105 |
institution |
Open Polar |
collection |
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 A. Held I. M. Brooks C. Leck M. Tjernström On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
We present direct eddy covariance measurements of aerosol number fluxes, dominated by sub-50 nm particles, at the edge of an ice floe drifting in the central Arctic Ocean. The measurements were made during the ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in August 2008 between 2°–10° W longitude and 87°–87.5° N latitude. The median aerosol transfer velocities over different surface types (open water leads, ice ridges, snow and ice surfaces) ranged from 0.27 to 0.68 mm s −1 during deposition-dominated episodes. Emission periods were observed more frequently over the open lead, while the snow behaved primarily as a deposition surface. Directly measured aerosol fluxes were compared with particle deposition parameterizations in order to estimate the emission flux from the observed net aerosol flux. Finally, the contribution of the open lead particle source to atmospheric variations in particle number concentration was evaluated and compared with the observed temporal evolution of particle number. The direct emission of aerosol particles from the open lead can explain only 5–10% of the observed particle number variation in the mixing layer close to the surface. |
format |
Article in Journal/Newspaper |
author |
A. Held I. M. Brooks C. Leck M. Tjernström |
author_facet |
A. Held I. M. Brooks C. Leck M. Tjernström |
author_sort |
A. Held |
title |
On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
title_short |
On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
title_full |
On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
title_fullStr |
On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
title_full_unstemmed |
On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration |
title_sort |
on the potential contribution of open lead particle emissions to the central arctic aerosol concentration |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/acp-11-3093-2011 https://doaj.org/article/b7142ef235a24db1af7dce1ad66d9652 |
long_lat |
ENVELOPE(-67.257,-67.257,-67.874,-67.874) |
geographic |
Arctic Arctic Ocean Breaker |
geographic_facet |
Arctic Arctic Ocean Breaker |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Atmospheric Chemistry and Physics, Vol 11, Iss 7, Pp 3093-3105 (2011) |
op_relation |
http://www.atmos-chem-phys.net/11/3093/2011/acp-11-3093-2011.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-11-3093-2011 1680-7316 1680-7324 https://doaj.org/article/b7142ef235a24db1af7dce1ad66d9652 |
op_doi |
https://doi.org/10.5194/acp-11-3093-2011 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
11 |
container_issue |
7 |
container_start_page |
3093 |
op_container_end_page |
3105 |
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1766322799026110464 |