Occurrence characteristics of electromagnetic ion cyclotron waves at sub-auroral Antarctic station Maitri during solar cycle 24
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- 資料種別
- 記事
- 著者・編者
- Aditi UpadhyayBharati KakadAmar Kakad
- 出版年月日等
- 2020-03-12
- 出版年（W3CDTF）
- 2020-03-12
- タイトル（掲載誌）
- EPS : Earth, Planets and Space
- 巻号年月日等（掲載誌）
- 72(35)
- 掲載巻
- 72(35)
- ISSN（掲載誌）
- 1880-5981
- ISSN-L（掲載誌）
- 1343-8832
- 本文の言語コード
- eng
- DOI
- 10.1186/s40623-020-01157-7
- 国立国会図書館永続的識別子
- info:ndljp/pid/11520489
- コレクション（共通）
- コレクション（障害者向け資料：レベル1）
- コレクション（個別）
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- 収集根拠
- オンライン資料収集制度
- 受理日（W3CDTF）
- 2020-08-03T12:00:21+09:00
- 保存日（W3CDTF）
- 2020-08-03
- 記録形式（IMT）
- application/pdf
- オンライン閲覧公開範囲
- 国立国会図書館内限定公開
- デジタル化資料送信
- 図書館・個人送信対象外
- 遠隔複写可否（NDL）
- 可
- 掲載誌（国立国会図書館永続的識別子）
- info:ndljp/pid/11467692
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- 要約等
- We present a statistical study of electromagnetic ion cyclotron (EMIC) waves observed at Antarctic station (geographic 70.7° S, 11.8° E, L=5) on quiet and disturbed days during 2011–2017. The data span a fairly good period of both ascending and descending phases of the solar cycle 24, which has witnessed extremely low activity. We noted EMIC wave occurrence by examining wave power in different frequency ranges in the spectrogram. EMIC wave occurrence during ascending and descending phases of solar cycle 24, its local time, seasonal dependence and durations have been examined. There are total 2367 days for which data are available. Overall, EMIC waves are observed for 3166.5 h (≈5.57% of total duration) which has contributions from 1263 days. We find a significantly higher EMIC wave occurrence during the descending phase (≈ 6.83%) as compared to the ascending phase (≈ 4.08%) of the solar cycle, which implies nearly a twofold increase in EMIC wave occurrence. This feature is attributed to the higher solar wind dynamic pressure during descending phase of solar activity. There is no evident difference in the percentage occurrence of EMIC waves on magnetically disturbed and quiet days. On ground, EMIC waves show marginally higher occurrence during winter as compared to summer. This seasonal tendency is attributed to lower electron densities and conductivities in the ionosphere, which can affect the propagation of EMIC waves through ionospheric ducts. In local time, the probability distribution function of EMIC wave occurrence shows enhancement during 11.7–20.7 LT (i.e., afternoon–dusk sector). Daily durations of EMIC waves are in the range of 5–1015 min and it is noted that the longer duration (240–1015 min) events are prevalent on quiet days and are mostly seen during the descending phase of solar cycle.
- DOI
- 10.1186/s40623-020-01157-7
- オンライン閲覧公開範囲
- インターネット公開
- 著作権情報
- © 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.
- 関連情報（URI）
- 参照
- Discovery of 1Hz Range Modulation of Isolated Proton Aurora at Subauroral LatitudesHeliospheric plasma sheet (HPS) impingement onto the magnetosphere as a cause of relativistic electron dropouts (REDs) via coherent EMIC wave scattering with possible consequences for climate change mechanismsInstantaneous Frequency Analysis on Nonlinear EMIC Emissions: Arase ObservationRelativistic electron pitch‐angle scattering by electromagnetic ion cyclotron waves during geomagnetic stormsCluster observations of EMIC triggered emissions in association with Pc1 waves near Earth's plasmapauseCan Ion Cyclotron Waves Propagate to the Ground?High‐latitude ground observations of Pc 1/2 micropulsationsSubpacket structures in EMIC rising tone emissions observed by the THEMIS probesMorphology and physics of short-period magnetic pulsationsLimit on stably trapped particle fluxesTest of Ion Cyclotron Resonance Instability Using Proton Distributions Obtained From Van Allen Probe‐A ObservationsIonospheric RadioTriggering process of electromagnetic ion cyclotron rising tone emissions in the inner magnetosphereTHEMIS observations of electromagnetic ion cyclotron wave occurrence: Dependence on AE, SYMH, and solar wind dynamic pressureCyclotron instabilities and electromagnetic emission in the ultra low frequency and very low frequency rangesComparing simulated and observed EMIC wave amplitudes using in situ Van Allen Probes’ measurementsModulation of Electromagnetic Ion Cyclotron Waves by Pc5 ULF Waves and Energetic Ring Current IonsIs the plasmapause a preferred source region of electromagnetic ion cyclotron waves in the magnetosphere?Relativistic electron precipitation by EMIC waves from self‐consistent global simulationsSolar wind dependence of the Pc1 wave activitySources of geomagnetic activity over the solar cycle: Relative importance of coronal mass ejections, high‐speed streams, and slow solar windAre high-intensity long-duration continuous AE activity (HILDCAA) events substorm expansion events?Multi‐MeV electron loss in the heart of the radiation beltsIon Injection Triggered EMIC Waves in the Earth's MagnetosphereEMIC waves observed at geosynchronous orbit under quiet geomagnetic conditions ( <i>Kp</i> ≤ 1)Characteristics of Subpacket Structures in Ground EMIC Wave ObservationsFull‐wave modeling of EMIC waves near the He<sup>+</sup> gyrofrequencySpatial localization and ducting of EMIC waves: Van Allen Probes and ground‐based observationsThe 4-second summertime micropulsation band at CollegePOES satellite observations of EMIC‐wave driven relativistic electron precipitation during 1998–2010The <i>K</i>‐derived planetary indices: Description and availabilityPc1 pulsations observed by AMPTE/CCE in the Earth's outer magnetosphereTheory and observation of electromagnetic ion cyclotron triggered emissions in the magnetosphereA statistical study of EMIC waves observed by Cluster: 1. Wave propertiesElectromagnetic ion cyclotron waves stimulated by modest magnetospheric compressionsPrecipitation of relativistic electrons by interaction with electromagnetic ion cyclotron wavesProbing the relationship between electromagnetic ion cyclotron waves and plasmaspheric plumes near geosynchronous orbitOccurrence features of simultaneous H+- and He+-band EMIC emissions in the outer radiation beltCoincident particle and optical observations of nightside subauroral proton precipitationOccurrence, liquid water content, and fraction of supercooled water clouds from combined CALIOP/IIR/MODIS measurementsStorm time dependence of equatorial disturbance dynamo zonal electric fieldsIntroductionStatistical analysis of EMIC waves in plasmaspheric plumes from Cluster observationsSolar cycle dependence of ion cyclotron wave frequenciesEffect of EMIC waves on relativistic and ultrarelativistic electron populations: Ground‐based and Van Allen Probes observationsViking magnetic and electric field observations of Pc 1 waves at high latitudesDiminishing activity of recent solar cycles (22–24) and their impact on geospaceSolar and geomagnetic disturbances during the declining phase of recent solar cyclesSolar cycle change of Pc1 waves observed by an equatorial satellite and on the groundDisturbance dynamo effects over low‐latitude <i>F</i> region: A study by network of VHF spaced receiversPc 1 micropulsations at a high‐latitude station: A study over nearly four solar cyclesPlasmaspheric plumes: CRRES observations of enhanced density beyond the plasmapause
- 連携機関・データベース
- 国立情報学研究所 : CiNii Research
- 提供元機関・データベース
- 学術機関リポジトリデータベース雑誌記事索引データベースCrossrefCiNii Articles科学研究費助成事業データベース
- 書誌ID（NDLBibID）
- 11520489
- NII論文ID
- 120006940297