Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans
Mixing states of soot-containing aerosol particles constitute important information for the simulation of climatic effects of black carbon in the atmosphere. To elucidate the mixing states and morphological features of soot-containing particles over remote oceans, we conducted on-board observations...
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ftdoajarticles:oai:doaj.org/article:a5c54ef44701472f9ac2d3888e51f5c2 2023-05-15T14:00:54+02:00 Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans S. Ueda K. Osada K. Hara M. Yabuki F. Hashihama J. Kanda 2018-07-01T00:00:00Z https://doi.org/10.5194/acp-18-9207-2018 https://doaj.org/article/a5c54ef44701472f9ac2d3888e51f5c2 EN eng Copernicus Publications https://www.atmos-chem-phys.net/18/9207/2018/acp-18-9207-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-9207-2018 1680-7316 1680-7324 https://doaj.org/article/a5c54ef44701472f9ac2d3888e51f5c2 Atmospheric Chemistry and Physics, Vol 18, Pp 9207-9224 (2018) Physics QC1-999 Chemistry QD1-999 article 2018 ftdoajarticles https://doi.org/10.5194/acp-18-9207-2018 2022-12-30T21:59:03Z Mixing states of soot-containing aerosol particles constitute important information for the simulation of climatic effects of black carbon in the atmosphere. To elucidate the mixing states and morphological features of soot-containing particles over remote oceans, we conducted on-board observations over the southern Indian Ocean and the Southern Ocean during the TR/V Umitaka-maru UM-08-09 cruise, which started from Benoa, Indonesia, on 1 December 2008 via Cape Town, South Africa, and which terminated in Fremantle, Australia, on 6 February 2009. The light absorption coefficients of size-segregated particles ( < 0.5 and < 1.0 µm diameter) and aerosol number concentrations (0.1–0.5 µm diameter) were measured to assist direct aerosol sampling. Size-segregated aerosol particles were collected for chemical analysis using ion chromatography. For transmission electron microscopy (TEM) analyses using water-dialysis methods, dried submicrometer aerosol particles were collected using a cascade impactor. We analyzed 13 TEM samples. Results of water-dialysis analysis demonstrate that most particles were water-soluble. However, for all TEM samples, particles were rarely found (2.1 % of particles on a TEM sample at a maximum) containing insoluble residuals with the characteristic soot shape. For samples collected over the Indian and Southern oceans at latitudes less than 62° S, some (20–35 %) soot-containing particles were found as bare soot. For samples collected near the Antarctic coast (65–68° S, 38–68° E), all soot-containing particles were mixed with water-soluble materials. Furthermore, 56 % of soot-containing particles had a satellite structure formed by the impact of droplets such as sulfuric acid. Chemical analysis of submicrometer particles near the Antarctic coast revealed high concentrations of non-sea-salt (nss) SO 4 2− and CH 3 SO 3 − , suggesting that aged soot-containing particles were transformed by soluble materials derived from dimethyl sulfide (DMS) oxidation. The obtained information of soot at ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Indian Atmospheric Chemistry and Physics 18 13 9207 9224 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 S. Ueda K. Osada K. Hara M. Yabuki F. Hashihama J. Kanda Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Mixing states of soot-containing aerosol particles constitute important information for the simulation of climatic effects of black carbon in the atmosphere. To elucidate the mixing states and morphological features of soot-containing particles over remote oceans, we conducted on-board observations over the southern Indian Ocean and the Southern Ocean during the TR/V Umitaka-maru UM-08-09 cruise, which started from Benoa, Indonesia, on 1 December 2008 via Cape Town, South Africa, and which terminated in Fremantle, Australia, on 6 February 2009. The light absorption coefficients of size-segregated particles ( < 0.5 and < 1.0 µm diameter) and aerosol number concentrations (0.1–0.5 µm diameter) were measured to assist direct aerosol sampling. Size-segregated aerosol particles were collected for chemical analysis using ion chromatography. For transmission electron microscopy (TEM) analyses using water-dialysis methods, dried submicrometer aerosol particles were collected using a cascade impactor. We analyzed 13 TEM samples. Results of water-dialysis analysis demonstrate that most particles were water-soluble. However, for all TEM samples, particles were rarely found (2.1 % of particles on a TEM sample at a maximum) containing insoluble residuals with the characteristic soot shape. For samples collected over the Indian and Southern oceans at latitudes less than 62° S, some (20–35 %) soot-containing particles were found as bare soot. For samples collected near the Antarctic coast (65–68° S, 38–68° E), all soot-containing particles were mixed with water-soluble materials. Furthermore, 56 % of soot-containing particles had a satellite structure formed by the impact of droplets such as sulfuric acid. Chemical analysis of submicrometer particles near the Antarctic coast revealed high concentrations of non-sea-salt (nss) SO 4 2− and CH 3 SO 3 − , suggesting that aged soot-containing particles were transformed by soluble materials derived from dimethyl sulfide (DMS) oxidation. The obtained information of soot at ... |
format |
Article in Journal/Newspaper |
author |
S. Ueda K. Osada K. Hara M. Yabuki F. Hashihama J. Kanda |
author_facet |
S. Ueda K. Osada K. Hara M. Yabuki F. Hashihama J. Kanda |
author_sort |
S. Ueda |
title |
Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
title_short |
Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
title_full |
Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
title_fullStr |
Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
title_full_unstemmed |
Morphological features and mixing states of soot-containing particles in the marine boundary layer over the Indian and Southern oceans |
title_sort |
morphological features and mixing states of soot-containing particles in the marine boundary layer over the indian and southern oceans |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-9207-2018 https://doaj.org/article/a5c54ef44701472f9ac2d3888e51f5c2 |
geographic |
Antarctic Southern Ocean The Antarctic Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Atmospheric Chemistry and Physics, Vol 18, Pp 9207-9224 (2018) |
op_relation |
https://www.atmos-chem-phys.net/18/9207/2018/acp-18-9207-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-9207-2018 1680-7316 1680-7324 https://doaj.org/article/a5c54ef44701472f9ac2d3888e51f5c2 |
op_doi |
https://doi.org/10.5194/acp-18-9207-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
13 |
container_start_page |
9207 |
op_container_end_page |
9224 |
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1766270288311353344 |