Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves
Abstract The brightness of aurorae in Earth’s polar region often beats with periods ranging from sub-second to a few tens of a second. Past observations showed that the beat of the aurora is composed of a superposition of two independent periodicities that co-exist hierarchically. However, the origi...
Main Authors: | , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Nature
2020
|
Subjects: | |
Online Access: | http://urn.fi/urn:nbn:fi-fe2020041516592 |
id |
ftunivoulu:oai:oulu.fi:nbnfi-fe2020041516592 |
---|---|
record_format |
openpolar |
spelling |
ftunivoulu:oai:oulu.fi:nbnfi-fe2020041516592 2023-07-30T04:01:45+02:00 Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves Hosokawa, K. (K.) Miyoshi, Y. (Y.) Ozaki, M. (M.) Oyama, S.-I. (S.-I.) Ogawa, Y. (Y.) Kurita, S. (S.) Kasahara, Y. (Y.) Kasaba, Y. (Y.) Yagitani, S. (S.) Matsuda, S. (S.) Tsuchiya, F. (F.) Kumamoto, A. (A.) Kataoka, R. (R.) Shiokawa, K. (K.) Raita, T. (T.) Turunen, E. (E.) Takashima, T. (T.) Shinohara, I. (I.) Fujii, R. (R.) 2020 application/pdf http://urn.fi/urn:nbn:fi-fe2020041516592 eng eng Springer Nature info:eu-repo/semantics/openAccess © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftunivoulu 2023-07-08T19:56:36Z Abstract The brightness of aurorae in Earth’s polar region often beats with periods ranging from sub-second to a few tens of a second. Past observations showed that the beat of the aurora is composed of a superposition of two independent periodicities that co-exist hierarchically. However, the origin of such multiple time-scale beats in aurora remains poorly understood due to a lack of measurements with sufficiently high temporal resolution. By coordinating experiments using ultrafast auroral imagers deployed in the Arctic with the newly-launched magnetospheric satellite Arase, we succeeded in identifying an excellent agreement between the beats in aurorae and intensity modulations of natural electromagnetic waves in space called “chorus”. In particular, sub-second scintillations of aurorae are precisely controlled by fine-scale chirping rhythms in chorus. The observation of this striking correlation demonstrates that resonant interaction between energetic electrons and chorus waves in magnetospheres orchestrates the complex behavior of aurora on Earth and other magnetized planets. Article in Journal/Newspaper Arctic Jultika - University of Oulu repository Arctic |
institution |
Open Polar |
collection |
Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
description |
Abstract The brightness of aurorae in Earth’s polar region often beats with periods ranging from sub-second to a few tens of a second. Past observations showed that the beat of the aurora is composed of a superposition of two independent periodicities that co-exist hierarchically. However, the origin of such multiple time-scale beats in aurora remains poorly understood due to a lack of measurements with sufficiently high temporal resolution. By coordinating experiments using ultrafast auroral imagers deployed in the Arctic with the newly-launched magnetospheric satellite Arase, we succeeded in identifying an excellent agreement between the beats in aurorae and intensity modulations of natural electromagnetic waves in space called “chorus”. In particular, sub-second scintillations of aurorae are precisely controlled by fine-scale chirping rhythms in chorus. The observation of this striking correlation demonstrates that resonant interaction between energetic electrons and chorus waves in magnetospheres orchestrates the complex behavior of aurora on Earth and other magnetized planets. |
format |
Article in Journal/Newspaper |
author |
Hosokawa, K. (K.) Miyoshi, Y. (Y.) Ozaki, M. (M.) Oyama, S.-I. (S.-I.) Ogawa, Y. (Y.) Kurita, S. (S.) Kasahara, Y. (Y.) Kasaba, Y. (Y.) Yagitani, S. (S.) Matsuda, S. (S.) Tsuchiya, F. (F.) Kumamoto, A. (A.) Kataoka, R. (R.) Shiokawa, K. (K.) Raita, T. (T.) Turunen, E. (E.) Takashima, T. (T.) Shinohara, I. (I.) Fujii, R. (R.) |
spellingShingle |
Hosokawa, K. (K.) Miyoshi, Y. (Y.) Ozaki, M. (M.) Oyama, S.-I. (S.-I.) Ogawa, Y. (Y.) Kurita, S. (S.) Kasahara, Y. (Y.) Kasaba, Y. (Y.) Yagitani, S. (S.) Matsuda, S. (S.) Tsuchiya, F. (F.) Kumamoto, A. (A.) Kataoka, R. (R.) Shiokawa, K. (K.) Raita, T. (T.) Turunen, E. (E.) Takashima, T. (T.) Shinohara, I. (I.) Fujii, R. (R.) Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
author_facet |
Hosokawa, K. (K.) Miyoshi, Y. (Y.) Ozaki, M. (M.) Oyama, S.-I. (S.-I.) Ogawa, Y. (Y.) Kurita, S. (S.) Kasahara, Y. (Y.) Kasaba, Y. (Y.) Yagitani, S. (S.) Matsuda, S. (S.) Tsuchiya, F. (F.) Kumamoto, A. (A.) Kataoka, R. (R.) Shiokawa, K. (K.) Raita, T. (T.) Turunen, E. (E.) Takashima, T. (T.) Shinohara, I. (I.) Fujii, R. (R.) |
author_sort |
Hosokawa, K. (K.) |
title |
Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
title_short |
Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
title_full |
Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
title_fullStr |
Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
title_full_unstemmed |
Multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
title_sort |
multiple time-scale beats in aurora:precise orchestration via magnetospheric chorus waves |
publisher |
Springer Nature |
publishDate |
2020 |
url |
http://urn.fi/urn:nbn:fi-fe2020041516592 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_rights |
info:eu-repo/semantics/openAccess © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1772812504873828352 |