Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse
Measurements of aerosol number concentrations and direct aerosol sampling were conducted on continental Antarctica during the traverse of the Japanese–Swedish joint Antarctic expedition (JASE) from 14 November 2007 until 24 January 2008. Aerosol concentrations in background conditions decreased grad...
Published in: | Atmospheric Chemistry and Physics |
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2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00044778 2023-05-15T13:55:42+02:00 Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse Hara, K. Nakazawa, F. Fujita, S. Fukui, K. Enomoto, H. Sugiyama, S. 2014-09 electronic https://doi.org/10.5194/acp-14-10211-2014 https://noa.gwlb.de/receive/cop_mods_00044778 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044398/acp-14-10211-2014.pdf https://acp.copernicus.org/articles/14/10211/2014/acp-14-10211-2014.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-14-10211-2014 https://noa.gwlb.de/receive/cop_mods_00044778 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044398/acp-14-10211-2014.pdf https://acp.copernicus.org/articles/14/10211/2014/acp-14-10211-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/acp-14-10211-2014 2022-02-08T22:39:54Z Measurements of aerosol number concentrations and direct aerosol sampling were conducted on continental Antarctica during the traverse of the Japanese–Swedish joint Antarctic expedition (JASE) from 14 November 2007 until 24 January 2008. Aerosol concentrations in background conditions decreased gradually with latitude in inland regions during the traverse. The lowest aerosol number concentrations were 160 L−1 in Dp > 0.3 μm, and 0.5 L−1 in Dp 2 μm. In contrast, aerosol concentrations reached 3278 L−1 in Dp > 0.3 μm, and 215 L−1 in Dp > 2 μm under strong wind conditions. The estimated aerosol mass concentrations were 0.04–5.7 μg m−3. Single particle analysis of aerosol particles collected during the JASE traverse was conducted using a scanning electron microscope equipped with an energy dispersive x ray spectrometer. Major aerosol constituents were sulfates in fine mode, and sulfate, sea salts, modified sea salts, and fractionated sea salts in coarse mode. K-rich sulfates, Mg-rich sulfate, Ca-rich sulfates, and minerals were identified as minor aerosol constituents. Horizontal features of Cl / Na ratios imply that sea-salt modification (i.e. Cl loss) occurred on the Antarctic continent during the summer. Most sea-salt particles in the continental region near the coast were modified with acidic sulfur species such as H2SO4 and CH3SO3H. By contrast, acidic species other than the acidic sulfur species (likely HNO3) contributed markedly to sea-salt modification in inland areas during the traverse. Mg-rich sea-salt particles and Mg-free sea-salt particles were present in coarse and fine modes from the coast to inland areas. These sea-salt particles might be associated with sea-salt fractionation on the snow surface of continental Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Niedersächsisches Online-Archiv NOA Antarctic The Antarctic Atmospheric Chemistry and Physics 14 18 10211 10230 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Hara, K. Nakazawa, F. Fujita, S. Fukui, K. Enomoto, H. Sugiyama, S. Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
topic_facet |
article Verlagsveröffentlichung |
description |
Measurements of aerosol number concentrations and direct aerosol sampling were conducted on continental Antarctica during the traverse of the Japanese–Swedish joint Antarctic expedition (JASE) from 14 November 2007 until 24 January 2008. Aerosol concentrations in background conditions decreased gradually with latitude in inland regions during the traverse. The lowest aerosol number concentrations were 160 L−1 in Dp > 0.3 μm, and 0.5 L−1 in Dp 2 μm. In contrast, aerosol concentrations reached 3278 L−1 in Dp > 0.3 μm, and 215 L−1 in Dp > 2 μm under strong wind conditions. The estimated aerosol mass concentrations were 0.04–5.7 μg m−3. Single particle analysis of aerosol particles collected during the JASE traverse was conducted using a scanning electron microscope equipped with an energy dispersive x ray spectrometer. Major aerosol constituents were sulfates in fine mode, and sulfate, sea salts, modified sea salts, and fractionated sea salts in coarse mode. K-rich sulfates, Mg-rich sulfate, Ca-rich sulfates, and minerals were identified as minor aerosol constituents. Horizontal features of Cl / Na ratios imply that sea-salt modification (i.e. Cl loss) occurred on the Antarctic continent during the summer. Most sea-salt particles in the continental region near the coast were modified with acidic sulfur species such as H2SO4 and CH3SO3H. By contrast, acidic species other than the acidic sulfur species (likely HNO3) contributed markedly to sea-salt modification in inland areas during the traverse. Mg-rich sea-salt particles and Mg-free sea-salt particles were present in coarse and fine modes from the coast to inland areas. These sea-salt particles might be associated with sea-salt fractionation on the snow surface of continental Antarctica. |
format |
Article in Journal/Newspaper |
author |
Hara, K. Nakazawa, F. Fujita, S. Fukui, K. Enomoto, H. Sugiyama, S. |
author_facet |
Hara, K. Nakazawa, F. Fujita, S. Fukui, K. Enomoto, H. Sugiyama, S. |
author_sort |
Hara, K. |
title |
Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
title_short |
Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
title_full |
Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
title_fullStr |
Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
title_full_unstemmed |
Horizontal distributions of aerosol constituents and their mixing states in Antarctica during the JASE traverse |
title_sort |
horizontal distributions of aerosol constituents and their mixing states in antarctica during the jase traverse |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/acp-14-10211-2014 https://noa.gwlb.de/receive/cop_mods_00044778 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044398/acp-14-10211-2014.pdf https://acp.copernicus.org/articles/14/10211/2014/acp-14-10211-2014.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-14-10211-2014 https://noa.gwlb.de/receive/cop_mods_00044778 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044398/acp-14-10211-2014.pdf https://acp.copernicus.org/articles/14/10211/2014/acp-14-10211-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-14-10211-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
18 |
container_start_page |
10211 |
op_container_end_page |
10230 |
_version_ |
1766262508642893824 |