Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station
オーロラが爆発するとヴァン・アレン帯の電子が上空65 kmにまで侵入することを解明. 京都大学プレスリリース. 2019-02-12. Transient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during the auroral breakup that occurred from 2220 to 2226 UT on June 30, 2017. During this event, the footprint of the Arase satellite was located...
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ftkyotouniv:oai:repository.kulib.kyoto-u.ac.jp:2433/236396 2023-05-15T13:51:56+02:00 Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station Kataoka, Ryuho Nishiyama, Takanori Tanaka, Yoshimasa Kadokura, Akira Uchida, Herbert Akihito Ebihara, Yusuke Ejiri, Mitsumu K. Tomikawa, Yoshihiro Tsutsumi, Masaki Sato, Kaoru Miyoshi, Yoshizumi Shiokawa, Kazuo Kurita, Satoshi Kasahara, Yoshiya Ozaki, Mitsunori Hosokawa, Keisuke Matsuda, Shoya Shinohara, Iku Takashima, Takeshi Sato, Tatsuhiko Mitani, Takefumi Hori, Tomoaki Higashio, Nana 片岡, 龍峰 西山, 尚典 田中, 良昌 門倉, 昭 内田, ヘルベルト 陽仁 海老原, 祐輔 江尻, 省 冨川, 喜弘 堤, 雅基 佐藤, 薫 三好, 由好 塩川, 和夫 栗田, 怜 笠原, 禎也 尾崎, 光紀 細川, 敬祐 松田, 昇也 篠原, 育 高島, 健 佐藤, 達彦 三谷, 烈史 堀, 智昭 東尾, 奈々 2019-01-23 application/pdf http://hdl.handle.net/2433/236396 eng eng Springer Nature 10.1186/s40623-019-0989-7 https://www.kyoto-u.ac.jp/ja/research-news/2019-02-12-1 1880-5981 http://hdl.handle.net/2433/236396 Earth, Planets and Space 71 9 15H05815 / 16H06286 / 15H02628 / 16H04056 / 14J02108 / 17H06140 / 15H05747 © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. CC-BY Aurora Mesosphere X-rays Energetic electrons Journal Article 2019 ftkyotouniv 2021-01-15T00:15:27Z オーロラが爆発するとヴァン・アレン帯の電子が上空65 kmにまで侵入することを解明. 京都大学プレスリリース. 2019-02-12. Transient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during the auroral breakup that occurred from 2220 to 2226 UT on June 30, 2017. During this event, the footprint of the Arase satellite was located within the field of view of the all-sky imagers at Syowa Station in the Antarctic. Auroral observations at Syowa Station revealed the dominant precipitation of relatively soft electrons during the auroral breakup. A corresponding spike in cosmic noise absorption was also observed at Syowa Station, while the Arase satellite observed a flux enhancement of > 100 keV electrons and a broadband noise without detecting chorus waves or electromagnetic ion cyclotron waves. A general-purpose Monte Carlo particle transport simulation code was used to quantitatively evaluate the ionization in the middle atmosphere. Results of this study indicate that the precipitation of energetic electrons of > 100 keV, rather than X-rays from the auroral electrons, played a dominant role in the transient and deep (65–70 km) mesospheric ionization during the observed auroral breakup. Article in Journal/Newspaper Antarc* Antarctic Kyoto University Research Information Repository (KURENAI) Antarctic The Antarctic Syowa Station |
institution |
Open Polar |
collection |
Kyoto University Research Information Repository (KURENAI) |
op_collection_id |
ftkyotouniv |
language |
English |
topic |
Aurora Mesosphere X-rays Energetic electrons |
spellingShingle |
Aurora Mesosphere X-rays Energetic electrons Kataoka, Ryuho Nishiyama, Takanori Tanaka, Yoshimasa Kadokura, Akira Uchida, Herbert Akihito Ebihara, Yusuke Ejiri, Mitsumu K. Tomikawa, Yoshihiro Tsutsumi, Masaki Sato, Kaoru Miyoshi, Yoshizumi Shiokawa, Kazuo Kurita, Satoshi Kasahara, Yoshiya Ozaki, Mitsunori Hosokawa, Keisuke Matsuda, Shoya Shinohara, Iku Takashima, Takeshi Sato, Tatsuhiko Mitani, Takefumi Hori, Tomoaki Higashio, Nana Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
topic_facet |
Aurora Mesosphere X-rays Energetic electrons |
description |
オーロラが爆発するとヴァン・アレン帯の電子が上空65 kmにまで侵入することを解明. 京都大学プレスリリース. 2019-02-12. Transient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during the auroral breakup that occurred from 2220 to 2226 UT on June 30, 2017. During this event, the footprint of the Arase satellite was located within the field of view of the all-sky imagers at Syowa Station in the Antarctic. Auroral observations at Syowa Station revealed the dominant precipitation of relatively soft electrons during the auroral breakup. A corresponding spike in cosmic noise absorption was also observed at Syowa Station, while the Arase satellite observed a flux enhancement of > 100 keV electrons and a broadband noise without detecting chorus waves or electromagnetic ion cyclotron waves. A general-purpose Monte Carlo particle transport simulation code was used to quantitatively evaluate the ionization in the middle atmosphere. Results of this study indicate that the precipitation of energetic electrons of > 100 keV, rather than X-rays from the auroral electrons, played a dominant role in the transient and deep (65–70 km) mesospheric ionization during the observed auroral breakup. |
author2 |
片岡, 龍峰 西山, 尚典 田中, 良昌 門倉, 昭 内田, ヘルベルト 陽仁 海老原, 祐輔 江尻, 省 冨川, 喜弘 堤, 雅基 佐藤, 薫 三好, 由好 塩川, 和夫 栗田, 怜 笠原, 禎也 尾崎, 光紀 細川, 敬祐 松田, 昇也 篠原, 育 高島, 健 佐藤, 達彦 三谷, 烈史 堀, 智昭 東尾, 奈々 |
format |
Article in Journal/Newspaper |
author |
Kataoka, Ryuho Nishiyama, Takanori Tanaka, Yoshimasa Kadokura, Akira Uchida, Herbert Akihito Ebihara, Yusuke Ejiri, Mitsumu K. Tomikawa, Yoshihiro Tsutsumi, Masaki Sato, Kaoru Miyoshi, Yoshizumi Shiokawa, Kazuo Kurita, Satoshi Kasahara, Yoshiya Ozaki, Mitsunori Hosokawa, Keisuke Matsuda, Shoya Shinohara, Iku Takashima, Takeshi Sato, Tatsuhiko Mitani, Takefumi Hori, Tomoaki Higashio, Nana |
author_facet |
Kataoka, Ryuho Nishiyama, Takanori Tanaka, Yoshimasa Kadokura, Akira Uchida, Herbert Akihito Ebihara, Yusuke Ejiri, Mitsumu K. Tomikawa, Yoshihiro Tsutsumi, Masaki Sato, Kaoru Miyoshi, Yoshizumi Shiokawa, Kazuo Kurita, Satoshi Kasahara, Yoshiya Ozaki, Mitsunori Hosokawa, Keisuke Matsuda, Shoya Shinohara, Iku Takashima, Takeshi Sato, Tatsuhiko Mitani, Takefumi Hori, Tomoaki Higashio, Nana |
author_sort |
Kataoka, Ryuho |
title |
Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
title_short |
Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
title_full |
Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
title_fullStr |
Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
title_full_unstemmed |
Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station |
title_sort |
transient ionization of the mesosphere during auroral breakup: arase satellite and ground-based conjugate observations at syowa station |
publisher |
Springer Nature |
publishDate |
2019 |
url |
http://hdl.handle.net/2433/236396 |
geographic |
Antarctic The Antarctic Syowa Station |
geographic_facet |
Antarctic The Antarctic Syowa Station |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
10.1186/s40623-019-0989-7 https://www.kyoto-u.ac.jp/ja/research-news/2019-02-12-1 1880-5981 http://hdl.handle.net/2433/236396 Earth, Planets and Space 71 9 15H05815 / 16H06286 / 15H02628 / 16H04056 / 14J02108 / 17H06140 / 15H05747 |
op_rights |
© The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
op_rightsnorm |
CC-BY |
_version_ |
1766255966267899904 |