Altitude effects of localized source currents on magnetotelluric responses

• 資料種別: 記事
• タイトル: Altitude effects of localized source currents on magnetotelluric responses
• 著者・編者: Shinya Sato
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2020-06-01
• 出版年（W3CDTF）: 2020-06-01
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 72(77)
• 掲載巻: 72(77)
• 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/s40623-020-01200-7; https://doi.org/10.1186/s40623-020-01200-7
• 国立国会図書館永続的識別子: info:ndljp/pid/11520531; https://dl.ndl.go.jp/pid/11520531
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• 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; https://dl.ndl.go.jp/collections/B00035
• 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
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• 掲載誌（URI）: https://earth-planets-space.springeropen.com/articles
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/11467692; https://dl.ndl.go.jp/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; https://dl.ndl.go.jp

• 要約等: The effects of localized source currents on Earth’s magnetotelluric (MT) responses have been reported in the literature in terms of the changes in period and subsurface structure. The focus in this study is on the bias within the MT responses arising from variations in the vertical and horizontal distances of the source current. The MT responses at the periods of field aligned resonance (20 and 200 s) were calculated at various distances from the source current. A slight change in source distance causes a shift in the MT responses. The shift of apparent resistivity at 20 and 200 s exceeds 10% and 50% of the original values, respectively. Such features are found especially over the altitude range of the ionospheric E layer (i.e., 100–150 km), where MT source currents often flow. The vertical distance of the source field varies because the distribution of conductivity with altitude in the ionosphere and the region controlling the ionospheric electrical process change temporally. Thus, in assessing the temporal changes in MT responses, we should treat them carefully by checking the ionospheric environment.
• DOI: 10.1186/s40623-020-01200-7; https://doi.org/10.1186/s40623-020-01200-7; 10.48550/arxiv.2003.01578; https://doi.org/10.48550/arxiv.2003.01578
• 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）: http://hdl.handle.net/2433/261241; http://id.ndl.go.jp/digimeta/11520531; https://dl.ndl.go.jp/pid/11520531; https://link.springer.com/content/pdf/10.1186/s40623-020-01200-7.pdf; https://link.springer.com/article/10.1186/s40623-020-01200-7/fulltext.html
• 参照: ループ状電流源が球体地球上のmagnetotelluric応答関数に与える影響について; https://cir.nii.ac.jp/crid/1390848250119148928; Spatial gradients of geomagnetic temporal variations causing the instability of inter-station transfer functions; https://cir.nii.ac.jp/crid/2051433317026717312
• 参照: Source effects in mid-latitude geomagnetic transfer functions; https://cir.nii.ac.jp/crid/1360292618951733504; Heights of electric currents near the auroral zone; https://cir.nii.ac.jp/crid/1360292621591251712; Height-integrated Pedersen conductivity in both E and F regions from COSMIC observations; https://cir.nii.ac.jp/crid/1360855568977276544; On magnetotelluric source effects caused by an auroral electrojet system; https://cir.nii.ac.jp/crid/1361137046515684480; Sq and EEJ—A Review on the Daily Variation of the Geomagnetic Field Caused by Ionospheric Dynamo Currents; https://cir.nii.ac.jp/crid/1361418521502715264; Direct penetration of the interplanetary electric field to low geomagnetic latitudes and its effect on magnetotelluric sounding; https://cir.nii.ac.jp/crid/1361699996065983360; Magnetotelluric fields of a line current; https://cir.nii.ac.jp/crid/1362825893483880960; On the sensitivity of long-term magnetotelluric monitoring in Southern Italy and source-dependent robust single station transfer function variability; https://cir.nii.ac.jp/crid/1364233268303710976; $F$-Region Dynamo Simulations at Low and Mid-Latitude; https://cir.nii.ac.jp/crid/1364233268551884160; Source biases in midlatitude magnetotelluric transfer functions due to Pc3-4 geomagnetic pulsations; https://cir.nii.ac.jp/crid/2050870367055041280
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 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; https://irdb.nii.ac.jp; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles; 科学研究費助成事業データベース; https://kaken.nii.ac.jp/ja
• 書誌ID（NDLBibID）: 11520531; http://id.ndl.go.jp/bib/11520531
• NII論文ID: 120006956724