Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008
The representation of aerosol properties and processes in climate models is fraught with large uncertainties. Especially at high northern latitudes a strong underprediction of aerosol concentrations and nucleation events is observed and can only be constrained by in situ observations based on the an...
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ftdoajarticles:oai:doaj.org/article:4e54cdb1986242f28f188f8252034877 2023-05-15T15:02:08+02:00 Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 E. Hamacher-Barth C. Leck K. Jansson 2016-05-01T00:00:00Z https://doi.org/10.5194/acp-16-6577-2016 https://doaj.org/article/4e54cdb1986242f28f188f8252034877 EN eng Copernicus Publications https://www.atmos-chem-phys.net/16/6577/2016/acp-16-6577-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-6577-2016 1680-7316 1680-7324 https://doaj.org/article/4e54cdb1986242f28f188f8252034877 Atmospheric Chemistry and Physics, Vol 16, Pp 6577-6593 (2016) Physics QC1-999 Chemistry QD1-999 article 2016 ftdoajarticles https://doi.org/10.5194/acp-16-6577-2016 2022-12-31T14:58:57Z The representation of aerosol properties and processes in climate models is fraught with large uncertainties. Especially at high northern latitudes a strong underprediction of aerosol concentrations and nucleation events is observed and can only be constrained by in situ observations based on the analysis of individual aerosol particles. To further reduce the uncertainties surrounding aerosol properties and their potential role as cloud condensation nuclei this study provides observational data resolved over size on morphological and chemical properties of aerosol particles collected in the summer high Arctic, north of 80° N. Aerosol particles were imaged with scanning and transmission electron microscopy and further evaluated with digital image analysis. In total, 3909 aerosol particles were imaged and categorized according to morphological similarities into three gross morphological groups: single particles, gel particles, and halo particles. Single particles were observed between 15 and 800 nm in diameter and represent the dominating type of particles (82 %). The majority of particles appeared to be marine gels with a broad Aitken mode peaking at 70 nm and accompanied by a minor fraction of ammonium (bi)sulfate with a maximum at 170 nm in number concentration. Gel particles (11 % of all particles) were observed between 45 and 800 nm with a maximum at 154 nm in diameter. Imaging with transmission electron microscopy allowed further morphological discrimination of gel particles in "aggregate" particles, "aggregate with film" particles, and "mucus-like" particles. Halo particles were observed above 75 nm and appeared to be ammonium (bi)sulfate (59 % of halo particles), gel matter (19 %), or decomposed gel matter (22 %), which were internally mixed with sulfuric acid, methane sulfonic acid, or ammonium (bi)sulfate with a maximum at 161 nm in diameter. Elemental dispersive X-ray spectroscopy analysis of individual particles revealed a prevalence of the monovalent ions Na + /K + for single particles and aggregate ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Atmospheric Chemistry and Physics 16 10 6577 6593 |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 E. Hamacher-Barth C. Leck K. Jansson Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The representation of aerosol properties and processes in climate models is fraught with large uncertainties. Especially at high northern latitudes a strong underprediction of aerosol concentrations and nucleation events is observed and can only be constrained by in situ observations based on the analysis of individual aerosol particles. To further reduce the uncertainties surrounding aerosol properties and their potential role as cloud condensation nuclei this study provides observational data resolved over size on morphological and chemical properties of aerosol particles collected in the summer high Arctic, north of 80° N. Aerosol particles were imaged with scanning and transmission electron microscopy and further evaluated with digital image analysis. In total, 3909 aerosol particles were imaged and categorized according to morphological similarities into three gross morphological groups: single particles, gel particles, and halo particles. Single particles were observed between 15 and 800 nm in diameter and represent the dominating type of particles (82 %). The majority of particles appeared to be marine gels with a broad Aitken mode peaking at 70 nm and accompanied by a minor fraction of ammonium (bi)sulfate with a maximum at 170 nm in number concentration. Gel particles (11 % of all particles) were observed between 45 and 800 nm with a maximum at 154 nm in diameter. Imaging with transmission electron microscopy allowed further morphological discrimination of gel particles in "aggregate" particles, "aggregate with film" particles, and "mucus-like" particles. Halo particles were observed above 75 nm and appeared to be ammonium (bi)sulfate (59 % of halo particles), gel matter (19 %), or decomposed gel matter (22 %), which were internally mixed with sulfuric acid, methane sulfonic acid, or ammonium (bi)sulfate with a maximum at 161 nm in diameter. Elemental dispersive X-ray spectroscopy analysis of individual particles revealed a prevalence of the monovalent ions Na + /K + for single particles and aggregate ... |
format |
Article in Journal/Newspaper |
author |
E. Hamacher-Barth C. Leck K. Jansson |
author_facet |
E. Hamacher-Barth C. Leck K. Jansson |
author_sort |
E. Hamacher-Barth |
title |
Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
title_short |
Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
title_full |
Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
title_fullStr |
Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
title_full_unstemmed |
Size-resolved morphological properties of the high Arctic summer aerosol during ASCOS-2008 |
title_sort |
size-resolved morphological properties of the high arctic summer aerosol during ascos-2008 |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-6577-2016 https://doaj.org/article/4e54cdb1986242f28f188f8252034877 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Arctic Aitken |
geographic_facet |
Arctic Aitken |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 16, Pp 6577-6593 (2016) |
op_relation |
https://www.atmos-chem-phys.net/16/6577/2016/acp-16-6577-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-6577-2016 1680-7316 1680-7324 https://doaj.org/article/4e54cdb1986242f28f188f8252034877 |
op_doi |
https://doi.org/10.5194/acp-16-6577-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
10 |
container_start_page |
6577 |
op_container_end_page |
6593 |
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1766334125395935232 |