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  1. F300 宇宙地球環境研究所
  2. F300a 雑誌掲載論文
  3. 学術雑誌

Ion‐Neutral Collision Frequencies for Calculating Ionospheric Conductivity

http://hdl.handle.net/2237/00032499
http://hdl.handle.net/2237/00032499
ac4c96bc-8740-42f8-82e5-87c64b7d691e
名前 / ファイル ライセンス アクション
2019JA027128.pdf 2019JA027128 (1.2 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-07-06
タイトル
タイトル Ion‐Neutral Collision Frequencies for Calculating Ionospheric Conductivity
言語 en
著者 Ieda, A.

× Ieda, A.

WEKO 100558

en Ieda, A.

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2020 American Geophysical Union
抄録
内容記述 Molecular oxygen collides with its first positive ion in the Earth's ionosphere. The collision frequency of this particle pair is used to calculate the electric conductivity of the ionosphere. However, for this parental pair there are two collision types, resonant and nonresonant, and the selection of the collision type has differed among previous studies in calculation of conductivity. In the present study, we clarify that the nonresonant collision is physically essential for this pair because the relevant temperatures are low. That is, the peak of the ionospheric conductivity occurs at altitudes between 100 and 130 km, where the temperatures of ions and neutral particles are usually lower than 600 K, and for these temperatures nonresonant collisions are dominant. The collision frequency would be underestimated by 30% if the resonant collision was assumed at an altitude of 110 km (where the temperature is 240 K). The impact of this difference on the conductivity is estimated to be small (3%), primarily because molecular nitrogen is much more abundant than molecular oxygen. Although we have confirmed that the nonresonant collision is essential, we also include the resonant type, primarily in case of possible elevated temperature events. A set of ion‐neutral collision frequency coefficients for calculating the conductivity is summarized, including other particle pairs, in the Appendices. Small corrections to the traditional coefficients are made.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2020-08-01
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 Wiley
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1029/2019JA027128
ISSN(Online)
収録物識別子タイプ EISSN
収録物識別子 2169-9380
書誌情報 en : Journal of Geophysical Research: Space Physics

巻 125, 号 2, p. e2019JA027128, 発行日 2020-02
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