Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter
Snow samples collected over sea ice near Syowa Station were analyzed for ionic constituents to understand sulfate depletion in sea salt aerosol particles, which have often been observed in winter in the coastal region of Antarctica. Ratios of Cl/Na^+ in snow were higher than that in sea water, where...
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ftnipr:oai:nipr.repo.nii.ac.jp:00002927 2023-05-15T13:49:00+02:00 Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter オサダ カズオ ハラ ケイイチロウ キドウ ミズカ カイ ヒロキ ヤマノウチ タカシ ハシダ ゲン マツナガ カツジ イワサカ ヤスノブ Kazuo Osada Keiichiro Hara Mizuka Kido Hiroki Kai Takashi Yamanouchi Gen Hashida Katsuji Matsunaga Yasunobu Iwasaka 2001-11 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2927 http://id.nii.ac.jp/1291/00002927/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2927&item_no=1&attribute_id=18&file_no=1 en eng Scientific Paper STEL, Nagoya University STEL, Nagoya University:National Institute of Polar Research RESTEC National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2927 http://id.nii.ac.jp/1291/00002927/ AA1129795X Polar meteorology and glaciology, 15, 21-31(2001-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2927&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 2001 ftnipr 2022-11-26T19:42:17Z Snow samples collected over sea ice near Syowa Station were analyzed for ionic constituents to understand sulfate depletion in sea salt aerosol particles, which have often been observed in winter in the coastal region of Antarctica. Ratios of Cl/Na^+ in snow were higher than that in sea water, whereas SO_4^<2->/Na^+ ratios were lower in snow samples. The degree of SO_4^2 depletion relative to the sea water composition increased with increase in Na^+ concentration. From comparison with a simple chemical mass balance model using the SO_4^<2->/Na^+ ratios in the samples, depletion of SO_4^<2-> in snow is considered to be largely attributed to the fractionation of sulfate by forming Mirabilite (Na_2SO_4・10H_2O) during sea ice growth. The Br/Na^+ ratios of the snow predicted from the fractionation model differ significantly from the observed values : positive deviations were found in dark early July and negative deviations were seen in September. This could have resulted from Br_2 release from the snow after local sunrise. In winter aerosols collected at Syowa Station, depletion of SO_4^<2-> was also found. Based on statistics of meteorological data at Syowa Station, as appropriate conditions of meteorological and salt concentrations in drifting snow particle were fulfilled, the depletion of SO_4^2 in aerosol particles in winter can be explained by sublimation of salted drifting snow particles from the sea ice area. Report Antarc* Antarctica Polar meteorology and glaciology Sea ice National Institute of Polar Research Repository, Japan Syowa Station |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
Snow samples collected over sea ice near Syowa Station were analyzed for ionic constituents to understand sulfate depletion in sea salt aerosol particles, which have often been observed in winter in the coastal region of Antarctica. Ratios of Cl/Na^+ in snow were higher than that in sea water, whereas SO_4^<2->/Na^+ ratios were lower in snow samples. The degree of SO_4^2 depletion relative to the sea water composition increased with increase in Na^+ concentration. From comparison with a simple chemical mass balance model using the SO_4^<2->/Na^+ ratios in the samples, depletion of SO_4^<2-> in snow is considered to be largely attributed to the fractionation of sulfate by forming Mirabilite (Na_2SO_4・10H_2O) during sea ice growth. The Br/Na^+ ratios of the snow predicted from the fractionation model differ significantly from the observed values : positive deviations were found in dark early July and negative deviations were seen in September. This could have resulted from Br_2 release from the snow after local sunrise. In winter aerosols collected at Syowa Station, depletion of SO_4^<2-> was also found. Based on statistics of meteorological data at Syowa Station, as appropriate conditions of meteorological and salt concentrations in drifting snow particle were fulfilled, the depletion of SO_4^2 in aerosol particles in winter can be explained by sublimation of salted drifting snow particles from the sea ice area. |
format |
Report |
author |
オサダ カズオ ハラ ケイイチロウ キドウ ミズカ カイ ヒロキ ヤマノウチ タカシ ハシダ ゲン マツナガ カツジ イワサカ ヤスノブ Kazuo Osada Keiichiro Hara Mizuka Kido Hiroki Kai Takashi Yamanouchi Gen Hashida Katsuji Matsunaga Yasunobu Iwasaka |
spellingShingle |
オサダ カズオ ハラ ケイイチロウ キドウ ミズカ カイ ヒロキ ヤマノウチ タカシ ハシダ ゲン マツナガ カツジ イワサカ ヤスノブ Kazuo Osada Keiichiro Hara Mizuka Kido Hiroki Kai Takashi Yamanouchi Gen Hashida Katsuji Matsunaga Yasunobu Iwasaka Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
author_facet |
オサダ カズオ ハラ ケイイチロウ キドウ ミズカ カイ ヒロキ ヤマノウチ タカシ ハシダ ゲン マツナガ カツジ イワサカ ヤスノブ Kazuo Osada Keiichiro Hara Mizuka Kido Hiroki Kai Takashi Yamanouchi Gen Hashida Katsuji Matsunaga Yasunobu Iwasaka |
author_sort |
オサダ カズオ |
title |
Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
title_short |
Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
title_full |
Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
title_fullStr |
Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
title_full_unstemmed |
Sulfate depletion in snow over sea ice near Syowa Station, Antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
title_sort |
sulfate depletion in snow over sea ice near syowa station, antarctica, in relation to the origin of sulfate depleted sea salt aerosol particles in winter |
publisher |
Scientific Paper |
publishDate |
2001 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2927 http://id.nii.ac.jp/1291/00002927/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2927&item_no=1&attribute_id=18&file_no=1 |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica Polar meteorology and glaciology Sea ice |
genre_facet |
Antarc* Antarctica Polar meteorology and glaciology Sea ice |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2927 http://id.nii.ac.jp/1291/00002927/ AA1129795X Polar meteorology and glaciology, 15, 21-31(2001-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2927&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250326881468416 |