Mesospheric ionization during substorm growth phase
Many studies have been conducted about the impact of energetic charged particles on the atmosphere during geomagnetically active times, while quiet time effects are poorly understood. We identified two energetic electron precipitation (EEP) events during the growth phase of moderate substorms and es...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2022-01-01
|
| Series: | Journal of Space Weather and Space Climate |
| Subjects: | |
| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2022/01/swsc210073/swsc210073.html |
| _version_ | 1828815025189421056 |
|---|---|
| author | Murase Kiyoka Kataoka Ryuho Nishiyama Takanori Nishimura Koji Hashimoto Taishi Tanaka Yoshimasa Kadokura Akira Tomikawa Yoshihiro Tsutsumi Masaki Ogawa Yasunobu Uchida Herbert Akihito Sato Kaoru Kasahara Satoshi Mitani Takefumi Yokota Shoichiro Hori Tomoaki Keika Kunihiro Takashima Takeshi Kasahara Yoshiya Matsuda Shoya Shoji Masafumi Matsuoka Ayako Shinohara Iku Miyoshi Yoshizumi Sato Tatsuhiko Ebihara Yusuke Tanaka Takashi |
| author_facet | Murase Kiyoka Kataoka Ryuho Nishiyama Takanori Nishimura Koji Hashimoto Taishi Tanaka Yoshimasa Kadokura Akira Tomikawa Yoshihiro Tsutsumi Masaki Ogawa Yasunobu Uchida Herbert Akihito Sato Kaoru Kasahara Satoshi Mitani Takefumi Yokota Shoichiro Hori Tomoaki Keika Kunihiro Takashima Takeshi Kasahara Yoshiya Matsuda Shoya Shoji Masafumi Matsuoka Ayako Shinohara Iku Miyoshi Yoshizumi Sato Tatsuhiko Ebihara Yusuke Tanaka Takashi |
| author_sort | Murase Kiyoka |
| collection | DOAJ |
| description | Many studies have been conducted about the impact of energetic charged particles on the atmosphere during geomagnetically active times, while quiet time effects are poorly understood. We identified two energetic electron precipitation (EEP) events during the growth phase of moderate substorms and estimated the mesospheric ionization rate for an EEP event for which the most comprehensive dataset from ground-based and space-born instruments was available. The mesospheric ionization signature reached below 70 km altitude and continued for ~15 min until the substorm onset, as observed by the PANSY radar and imaging riometer at Syowa Station in the Antarctic region. We also used energetic electron flux observed by the Arase and POES 15 satellites as the input for the air-shower simulation code PHITS to quantitatively estimate the mesospheric ionization rate. The calculated ionization level due to the precipitating electrons is consistent with the observed value of cosmic noise absorption. The possible spatial extent of EEP is estimated to be ~8 h MLT in longitude and ~1.5° in latitude from a global magnetohydrodynamic simulation REPPU and the precipitating electron observations by the POES satellite, respectively. Such a significant duration and spatial extent of EEP events suggest a non-negligible contribution of the growth phase EEP to the mesospheric ionization. Combining the cutting-edge observations and simulations, we shed new light on the space weather impact of the EEP events during geomagnetically quiet times, which is important to understand the possible link between the space environment and climate. |
| first_indexed | 2024-12-12T10:35:47Z |
| format | Article |
| id | doaj.art-f6c88d8112d940c6bc31918e9749248a |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-12-12T10:35:47Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-f6c88d8112d940c6bc31918e9749248a2022-12-22T00:27:13ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512022-01-01121810.1051/swsc/2022012swsc210073Mesospheric ionization during substorm growth phaseMurase Kiyoka0https://orcid.org/0000-0001-8871-9199Kataoka Ryuho1https://orcid.org/0000-0001-9400-1765Nishiyama Takanori2https://orcid.org/0000-0002-3648-6589Nishimura Koji3https://orcid.org/0000-0001-8824-9844Hashimoto Taishi4https://orcid.org/0000-0002-7082-9530Tanaka Yoshimasa5Kadokura Akira6https://orcid.org/0000-0002-6105-9562Tomikawa Yoshihiro7https://orcid.org/0000-0002-5652-3017Tsutsumi Masaki8https://orcid.org/0000-0003-0113-8311Ogawa Yasunobu9https://orcid.org/0000-0002-8118-4475Uchida Herbert Akihito10https://orcid.org/0000-0002-4228-9178Sato Kaoru11Kasahara Satoshi12https://orcid.org/0000-0002-3479-772XMitani Takefumi13https://orcid.org/0000-0003-0492-3104Yokota Shoichiro14https://orcid.org/0000-0001-8851-9146Hori Tomoaki15https://orcid.org/0000-0001-8451-6941Keika Kunihiro16https://orcid.org/0000-0003-0265-4318Takashima Takeshi17https://orcid.org/0000-0002-7818-7800Kasahara Yoshiya18https://orcid.org/0000-0002-9304-8235Matsuda Shoya19https://orcid.org/0000-0003-4778-8897Shoji Masafumi20https://orcid.org/0000-0001-6573-525XMatsuoka Ayako21https://orcid.org/0000-0001-5777-9711Shinohara Iku22https://orcid.org/0000-0003-2700-0353Miyoshi Yoshizumi23https://orcid.org/0000-0001-7998-1240Sato Tatsuhiko24https://orcid.org/0000-0001-9902-7083Ebihara Yusuke25https://orcid.org/0000-0002-2293-1557Tanaka Takashi26Department of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIResearch Institute for Sustainable Humanosphere, Kyoto UniversityDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIDepartment of Polar Science, The Graduate University for Advanced Studies, SOKENDAIJapan Aerospace Exploration Agency, Institute of Space and Astronautical ScienceDepartment of Earth and Planetary Science, The University of TokyoDepartment of Earth and Planetary Science, The University of TokyoJapan Aerospace Exploration Agency, Institute of Space and Astronautical ScienceGraduate School of Science, Osaka UniversityInstitute for Space–Earth Environmental Research, Nagoya UniversityDepartment of Earth and Planetary Science, The University of TokyoJapan Aerospace Exploration Agency, Institute of Space and Astronautical ScienceGraduate School of Natural Science and Technology, Kanazawa UniversityGraduate School of Natural Science and Technology, Kanazawa UniversityInstitute for Space–Earth Environmental Research, Nagoya UniversityData Analysis Center for Geomagnetism and Space Magnetism, Kyoto UniversityJapan Aerospace Exploration Agency, Institute of Space and Astronautical ScienceInstitute for Space–Earth Environmental Research, Nagoya UniversityJapan Atomic Energy AgencyResearch Institute for Sustainable Humanosphere, Kyoto UniversityInternational Center for Space Weather Science and Education, Kyushu UniversityMany studies have been conducted about the impact of energetic charged particles on the atmosphere during geomagnetically active times, while quiet time effects are poorly understood. We identified two energetic electron precipitation (EEP) events during the growth phase of moderate substorms and estimated the mesospheric ionization rate for an EEP event for which the most comprehensive dataset from ground-based and space-born instruments was available. The mesospheric ionization signature reached below 70 km altitude and continued for ~15 min until the substorm onset, as observed by the PANSY radar and imaging riometer at Syowa Station in the Antarctic region. We also used energetic electron flux observed by the Arase and POES 15 satellites as the input for the air-shower simulation code PHITS to quantitatively estimate the mesospheric ionization rate. The calculated ionization level due to the precipitating electrons is consistent with the observed value of cosmic noise absorption. The possible spatial extent of EEP is estimated to be ~8 h MLT in longitude and ~1.5° in latitude from a global magnetohydrodynamic simulation REPPU and the precipitating electron observations by the POES satellite, respectively. Such a significant duration and spatial extent of EEP events suggest a non-negligible contribution of the growth phase EEP to the mesospheric ionization. Combining the cutting-edge observations and simulations, we shed new light on the space weather impact of the EEP events during geomagnetically quiet times, which is important to understand the possible link between the space environment and climate.https://www.swsc-journal.org/articles/swsc/full_html/2022/01/swsc210073/swsc210073.htmlmesospheric ionizationenergetic electron precipitationsubstormgrowth phase |
| spellingShingle | Murase Kiyoka Kataoka Ryuho Nishiyama Takanori Nishimura Koji Hashimoto Taishi Tanaka Yoshimasa Kadokura Akira Tomikawa Yoshihiro Tsutsumi Masaki Ogawa Yasunobu Uchida Herbert Akihito Sato Kaoru Kasahara Satoshi Mitani Takefumi Yokota Shoichiro Hori Tomoaki Keika Kunihiro Takashima Takeshi Kasahara Yoshiya Matsuda Shoya Shoji Masafumi Matsuoka Ayako Shinohara Iku Miyoshi Yoshizumi Sato Tatsuhiko Ebihara Yusuke Tanaka Takashi Mesospheric ionization during substorm growth phase Journal of Space Weather and Space Climate mesospheric ionization energetic electron precipitation substorm growth phase |
| title | Mesospheric ionization during substorm growth phase |
| title_full | Mesospheric ionization during substorm growth phase |
| title_fullStr | Mesospheric ionization during substorm growth phase |
| title_full_unstemmed | Mesospheric ionization during substorm growth phase |
| title_short | Mesospheric ionization during substorm growth phase |
| title_sort | mesospheric ionization during substorm growth phase |
| topic | mesospheric ionization energetic electron precipitation substorm growth phase |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2022/01/swsc210073/swsc210073.html |
| work_keys_str_mv | AT murasekiyoka mesosphericionizationduringsubstormgrowthphase AT kataokaryuho mesosphericionizationduringsubstormgrowthphase AT nishiyamatakanori mesosphericionizationduringsubstormgrowthphase AT nishimurakoji mesosphericionizationduringsubstormgrowthphase AT hashimototaishi mesosphericionizationduringsubstormgrowthphase AT tanakayoshimasa mesosphericionizationduringsubstormgrowthphase AT kadokuraakira mesosphericionizationduringsubstormgrowthphase AT tomikawayoshihiro mesosphericionizationduringsubstormgrowthphase AT tsutsumimasaki mesosphericionizationduringsubstormgrowthphase AT ogawayasunobu mesosphericionizationduringsubstormgrowthphase AT uchidaherbertakihito mesosphericionizationduringsubstormgrowthphase AT satokaoru mesosphericionizationduringsubstormgrowthphase AT kasaharasatoshi mesosphericionizationduringsubstormgrowthphase AT mitanitakefumi mesosphericionizationduringsubstormgrowthphase AT yokotashoichiro mesosphericionizationduringsubstormgrowthphase AT horitomoaki mesosphericionizationduringsubstormgrowthphase AT keikakunihiro mesosphericionizationduringsubstormgrowthphase AT takashimatakeshi mesosphericionizationduringsubstormgrowthphase AT kasaharayoshiya mesosphericionizationduringsubstormgrowthphase AT matsudashoya mesosphericionizationduringsubstormgrowthphase AT shojimasafumi mesosphericionizationduringsubstormgrowthphase AT matsuokaayako mesosphericionizationduringsubstormgrowthphase AT shinoharaiku mesosphericionizationduringsubstormgrowthphase AT miyoshiyoshizumi mesosphericionizationduringsubstormgrowthphase AT satotatsuhiko mesosphericionizationduringsubstormgrowthphase AT ebiharayusuke mesosphericionizationduringsubstormgrowthphase AT tanakatakashi mesosphericionizationduringsubstormgrowthphase |