A statistical analysis of North East Atlantic (submicron) aerosol size distributions
The Global Atmospheric Watch research station at Mace Head (Ireland) offers the possibility to sample some of the cleanest air masses being imported into Europe as well as some of the most polluted being exported out of Europe. We present a statistical Cluster∼analysis of the physical characteristic...
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ftcsic:oai:digital.csic.es:10261/217569 2024-02-11T10:06:54+01:00 A statistical analysis of North East Atlantic (submicron) aerosol size distributions Dall'Osto, Manuel Monahan, C. Greaney, R. Beddows, D.C.S. Harrison, Roy M. Ceburnis, Darius O'Dowd, Colin D. 2011 http://hdl.handle.net/10261/217569 https://doi.org/10.5194/acpd-11-21677-2011 unknown European Geophysical Society Publisher's version http://dx.doi.org/10.5194/acpd-11-21677-2011 Sí doi:10.5194/acpd-11-21677-2011 issn: 1680-7367 Atmospheric Chemistry and Physics Discussions 11: 21677- 21711 (2011) http://hdl.handle.net/10261/217569 open artículo de revisión http://purl.org/coar/resource_type/c_dcae04bc 2011 ftcsic https://doi.org/10.5194/acpd-11-21677-2011 2024-01-16T10:56:49Z The Global Atmospheric Watch research station at Mace Head (Ireland) offers the possibility to sample some of the cleanest air masses being imported into Europe as well as some of the most polluted being exported out of Europe. We present a statistical Cluster∼analysis of the physical characteristics of aerosol size distributions in air ranging from the cleanest to the most polluted for the year 2008. Data coverage achieved was 75 % throughout the year. By applying the Hartigan-Wong k-Means method, 12 Clusters were identified as systematically occurring and these 12 Clusters could be further combined into 4 categories with similar characteristics, namely: coastal nucleation category (occurring 21.3 % of the time), open ocean nucleation category (occurring 32.6 % of the time), background clean marine category (occurring 26.1 % of the time) and anthropogenic category (occurring 20 % of the time) aerosol size distributions. The coastal nucleation category is characterised by a clear and dominant nucleation mode at sizes less that 10 nm while the open ocean nucleation category is characterised by a dominant Aitken mode between 15 nm and 50 nm. The background clean marine characteristic is a clear bimodality in the size distribution, although it should be noted that either the Aitken mode or the Accumulation mode may dominate the number concentration. By contrast, the continentally-influenced size distributions are generally more mono-modal, albeit with traces of bi-modality. The open ocean category occurs more often during May, June and July, corresponding with the N. E. Atlantic high biological period. Combined with the relatively high percentage frequency of occurrence (32.6 %), this suggests that the marine biota is an important source of new aerosol particles in N. E. Atlantic Air. Article in Journal/Newspaper North East Atlantic Digital.CSIC (Spanish National Research Council) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Hartigan ENVELOPE(-126.000,-126.000,-76.800,-76.800) Mace ENVELOPE(155.883,155.883,-81.417,-81.417) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
The Global Atmospheric Watch research station at Mace Head (Ireland) offers the possibility to sample some of the cleanest air masses being imported into Europe as well as some of the most polluted being exported out of Europe. We present a statistical Cluster∼analysis of the physical characteristics of aerosol size distributions in air ranging from the cleanest to the most polluted for the year 2008. Data coverage achieved was 75 % throughout the year. By applying the Hartigan-Wong k-Means method, 12 Clusters were identified as systematically occurring and these 12 Clusters could be further combined into 4 categories with similar characteristics, namely: coastal nucleation category (occurring 21.3 % of the time), open ocean nucleation category (occurring 32.6 % of the time), background clean marine category (occurring 26.1 % of the time) and anthropogenic category (occurring 20 % of the time) aerosol size distributions. The coastal nucleation category is characterised by a clear and dominant nucleation mode at sizes less that 10 nm while the open ocean nucleation category is characterised by a dominant Aitken mode between 15 nm and 50 nm. The background clean marine characteristic is a clear bimodality in the size distribution, although it should be noted that either the Aitken mode or the Accumulation mode may dominate the number concentration. By contrast, the continentally-influenced size distributions are generally more mono-modal, albeit with traces of bi-modality. The open ocean category occurs more often during May, June and July, corresponding with the N. E. Atlantic high biological period. Combined with the relatively high percentage frequency of occurrence (32.6 %), this suggests that the marine biota is an important source of new aerosol particles in N. E. Atlantic Air. |
format |
Article in Journal/Newspaper |
author |
Dall'Osto, Manuel Monahan, C. Greaney, R. Beddows, D.C.S. Harrison, Roy M. Ceburnis, Darius O'Dowd, Colin D. |
spellingShingle |
Dall'Osto, Manuel Monahan, C. Greaney, R. Beddows, D.C.S. Harrison, Roy M. Ceburnis, Darius O'Dowd, Colin D. A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
author_facet |
Dall'Osto, Manuel Monahan, C. Greaney, R. Beddows, D.C.S. Harrison, Roy M. Ceburnis, Darius O'Dowd, Colin D. |
author_sort |
Dall'Osto, Manuel |
title |
A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
title_short |
A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
title_full |
A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
title_fullStr |
A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
title_full_unstemmed |
A statistical analysis of North East Atlantic (submicron) aerosol size distributions |
title_sort |
statistical analysis of north east atlantic (submicron) aerosol size distributions |
publisher |
European Geophysical Society |
publishDate |
2011 |
url |
http://hdl.handle.net/10261/217569 https://doi.org/10.5194/acpd-11-21677-2011 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(-126.000,-126.000,-76.800,-76.800) ENVELOPE(155.883,155.883,-81.417,-81.417) |
geographic |
Aitken Hartigan Mace |
geographic_facet |
Aitken Hartigan Mace |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
Publisher's version http://dx.doi.org/10.5194/acpd-11-21677-2011 Sí doi:10.5194/acpd-11-21677-2011 issn: 1680-7367 Atmospheric Chemistry and Physics Discussions 11: 21677- 21711 (2011) http://hdl.handle.net/10261/217569 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/acpd-11-21677-2011 |
_version_ |
1790604920353718272 |