Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica
Oxygen isotopic contents of fresh snow drifts in the katabatic wind zone were measured. The samples were collected at a stage before forming deposited snow layers throughout the year. Besides, the oxygen isotope profiles of deposited snow layers at the same place were obtained. The δ^<18>O con...
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ftdoajarticles:oai:doaj.org/article:745be2deebff44fdbf474337dd6c944e 2023-05-15T13:48:16+02:00 Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica Yutaka Ageta 1993-03-01T00:00:00Z https://doi.org/10.15094/00008799 https://doaj.org/article/745be2deebff44fdbf474337dd6c944e EN JA eng jpn National Institute of Polar Research http://doi.org/10.15094/00008799 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008799 0085-7289 2432-079X https://doaj.org/article/745be2deebff44fdbf474337dd6c944e Antarctic Record, Vol 37, Iss 1, Pp 24-31 (1993) Geography (General) G1-922 article 1993 ftdoajarticles https://doi.org/10.15094/00008799 2022-12-31T04:55:49Z Oxygen isotopic contents of fresh snow drifts in the katabatic wind zone were measured. The samples were collected at a stage before forming deposited snow layers throughout the year. Besides, the oxygen isotope profiles of deposited snow layers at the same place were obtained. The δ^<18>O contents of the snow drifts had high values in summer (-30~-40‰); in winter, values were generally low (above -50‰) but sometimes there were high values similar to those in summer. Deviation of relations between air temperature at sampling time and δ^<18>O contents of the snow drifts under different weather conditions is discussed. Vertical profiles of δ^<18>O contents of deposited snow are supposed to show a wide annual range and complicated annual variation, if such snow drifts accumulated continuously. However, those of deposited snow actually seen in the surface layers usually show a narrow range (-35~-45‰) and simplified pattern. Positions of maxima and minima in δ^<18>O profiles of deposited snow have good correlations with layering of ice crusts which were formed during hiatus periods of snow deposition. These results indicate the importance of change of the isotopic contents after snow deposition for understanding the isotope profiles of deposited snow. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Station ENVELOPE(44.317,44.317,-70.683,-70.683) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Yutaka Ageta Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
topic_facet |
Geography (General) G1-922 |
description |
Oxygen isotopic contents of fresh snow drifts in the katabatic wind zone were measured. The samples were collected at a stage before forming deposited snow layers throughout the year. Besides, the oxygen isotope profiles of deposited snow layers at the same place were obtained. The δ^<18>O contents of the snow drifts had high values in summer (-30~-40‰); in winter, values were generally low (above -50‰) but sometimes there were high values similar to those in summer. Deviation of relations between air temperature at sampling time and δ^<18>O contents of the snow drifts under different weather conditions is discussed. Vertical profiles of δ^<18>O contents of deposited snow are supposed to show a wide annual range and complicated annual variation, if such snow drifts accumulated continuously. However, those of deposited snow actually seen in the surface layers usually show a narrow range (-35~-45‰) and simplified pattern. Positions of maxima and minima in δ^<18>O profiles of deposited snow have good correlations with layering of ice crusts which were formed during hiatus periods of snow deposition. These results indicate the importance of change of the isotopic contents after snow deposition for understanding the isotope profiles of deposited snow. |
format |
Article in Journal/Newspaper |
author |
Yutaka Ageta |
author_facet |
Yutaka Ageta |
author_sort |
Yutaka Ageta |
title |
Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
title_short |
Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
title_full |
Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
title_fullStr |
Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
title_full_unstemmed |
Annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at Mizuho Station, Antarctica |
title_sort |
annual variation of oxygen isotopic contents of drifting snow and the isotopic contents of deposited snow layers at mizuho station, antarctica |
publisher |
National Institute of Polar Research |
publishDate |
1993 |
url |
https://doi.org/10.15094/00008799 https://doaj.org/article/745be2deebff44fdbf474337dd6c944e |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(44.317,44.317,-70.683,-70.683) |
geographic |
Mizuho Mizuho Station |
geographic_facet |
Mizuho Mizuho Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Antarctic Record, Vol 37, Iss 1, Pp 24-31 (1993) |
op_relation |
http://doi.org/10.15094/00008799 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008799 0085-7289 2432-079X https://doaj.org/article/745be2deebff44fdbf474337dd6c944e |
op_doi |
https://doi.org/10.15094/00008799 |
_version_ |
1766249051520499712 |