Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields
To examine gravitational separation of the stratospheric air over Antarctica in austral summer, we collected air samples from altitudes of 10 to 30 km over Syowa Station (69.0°S, 39.6°E) using balloon‐borne cryogenic samplers for the period 1998–2013, and then analyzed them for δ 15 N of N 2 , δ 18...
Published in: | Atmospheric Science Letters |
---|---|
Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2018
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/asl.857 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fasl.857 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fasl.857 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl.857 |
id |
crwiley:10.1002/asl.857 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/asl.857 2024-06-02T07:58:35+00:00 Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields Ishidoya, Shigeyuki Sugawara, Satoshi Inai, Yoichi Morimoto, Shinji Honda, Hideyuki Ikeda, Chusaku Hashida, Gen Machida, Toshinobu Tomikawa, Yoshihiro Toyoda, Sakae Goto, Daisuke Aoki, Shuji Nakazawa, Takakiyo Institute of Space and Astronautical Science Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology National Institute of Polar Research 2018 http://dx.doi.org/10.1002/asl.857 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fasl.857 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fasl.857 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl.857 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Atmospheric Science Letters volume 19, issue 11 ISSN 1530-261X 1530-261X journal-article 2018 crwiley https://doi.org/10.1002/asl.857 2024-05-03T11:32:12Z To examine gravitational separation of the stratospheric air over Antarctica in austral summer, we collected air samples from altitudes of 10 to 30 km over Syowa Station (69.0°S, 39.6°E) using balloon‐borne cryogenic samplers for the period 1998–2013, and then analyzed them for δ 15 N of N 2 , δ 18 O of O 2 , δ(Ar/N 2 ) and δ 40 Ar. The normalized mass ratio “δ,” calculated using their measured values, decreases with increasing altitude, implying an upward enhancement of the gravitational separation effect. The observed stratospheric δ profiles are generally well reproduced by a two‐dimensional atmospheric model, but the model tends to underestimate the observed δ values in the middle stratosphere above 26 km. We also observe interannual variation in the δ vertical profile in the middle stratosphere. A backward trajectory analysis suggests that this variation is attributable to different horizontal mixing of the stratospheric air over Antarctica from year to year. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Austral Syowa Station Atmospheric Science Letters 19 11 e857 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
To examine gravitational separation of the stratospheric air over Antarctica in austral summer, we collected air samples from altitudes of 10 to 30 km over Syowa Station (69.0°S, 39.6°E) using balloon‐borne cryogenic samplers for the period 1998–2013, and then analyzed them for δ 15 N of N 2 , δ 18 O of O 2 , δ(Ar/N 2 ) and δ 40 Ar. The normalized mass ratio “δ,” calculated using their measured values, decreases with increasing altitude, implying an upward enhancement of the gravitational separation effect. The observed stratospheric δ profiles are generally well reproduced by a two‐dimensional atmospheric model, but the model tends to underestimate the observed δ values in the middle stratosphere above 26 km. We also observe interannual variation in the δ vertical profile in the middle stratosphere. A backward trajectory analysis suggests that this variation is attributable to different horizontal mixing of the stratospheric air over Antarctica from year to year. |
author2 |
Institute of Space and Astronautical Science Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology National Institute of Polar Research |
format |
Article in Journal/Newspaper |
author |
Ishidoya, Shigeyuki Sugawara, Satoshi Inai, Yoichi Morimoto, Shinji Honda, Hideyuki Ikeda, Chusaku Hashida, Gen Machida, Toshinobu Tomikawa, Yoshihiro Toyoda, Sakae Goto, Daisuke Aoki, Shuji Nakazawa, Takakiyo |
spellingShingle |
Ishidoya, Shigeyuki Sugawara, Satoshi Inai, Yoichi Morimoto, Shinji Honda, Hideyuki Ikeda, Chusaku Hashida, Gen Machida, Toshinobu Tomikawa, Yoshihiro Toyoda, Sakae Goto, Daisuke Aoki, Shuji Nakazawa, Takakiyo Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
author_facet |
Ishidoya, Shigeyuki Sugawara, Satoshi Inai, Yoichi Morimoto, Shinji Honda, Hideyuki Ikeda, Chusaku Hashida, Gen Machida, Toshinobu Tomikawa, Yoshihiro Toyoda, Sakae Goto, Daisuke Aoki, Shuji Nakazawa, Takakiyo |
author_sort |
Ishidoya, Shigeyuki |
title |
Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
title_short |
Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
title_full |
Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
title_fullStr |
Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
title_full_unstemmed |
Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields |
title_sort |
gravitational separation of the stratospheric air over syowa, antarctica and its connection with meteorological fields |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/asl.857 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fasl.857 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fasl.857 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl.857 |
geographic |
Austral Syowa Station |
geographic_facet |
Austral Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Atmospheric Science Letters volume 19, issue 11 ISSN 1530-261X 1530-261X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/asl.857 |
container_title |
Atmospheric Science Letters |
container_volume |
19 |
container_issue |
11 |
container_start_page |
e857 |
_version_ |
1800741976003313664 |