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Ion‐Neutral Collision Frequencies for Calculating Ionospheric Conductivity
http://hdl.handle.net/2237/00032499
http://hdl.handle.net/2237/00032499ac4c96bc-8740-42f8-82e5-87c64b7d691e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
2019JA027128 (1.2 MB)
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| 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. |
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| 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 | ||||||
| 内容記述タイプ | Abstract | |||||
| 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 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ファイル公開：2020-08-01 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Wiley | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | 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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| 著者版フラグ | ||||||
| 値 | publisher | |||||
