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Coordinated observations of postmidnight irregularities and thermospheric neutral winds and temperatures at low latitudes
http://hdl.handle.net/2237/27067
http://hdl.handle.net/2237/27067dc99c280-5398-4449-aa62-5908d4c8164e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Dao_et_al-2017-Journal_of_Geophysical_Research_Space_Physics.pdf ファイル公開日:2018/01/01 (2.4 MB)
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-11-07 | |||||
| タイトル | ||||||
| タイトル | Coordinated observations of postmidnight irregularities and thermospheric neutral winds and temperatures at low latitudes | |||||
| 言語 | en | |||||
| 著者 |
Dao, Tam
× Dao, Tam× Otsuka, Yuichi× Shiokawa, Kazuo× Nishioka, Michi× Yamamoto, Mamoru× Buhari, Suhaila M.× Abdullah, Mardina× Husin, Asnawi |
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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 | ||||||
| 権利情報 | © 2017 American Geophysical Union | |||||
| 言語 | en | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigated a postmidnight field-aligned irregularity (FAI) event observed with the Equatorial Atmosphere Radar at Kototabang (0.2°S, 100.3°E, dip latitude 10.4°S) in Indonesia on the night of 9 July 2010 using a comprehensive data set of both neutral and plasma parameters. We examined the rate of total electron content change index (ROTI) obtained from GPS receivers in Southeast Asia, airglow images detected by an all-sky imager, and thermospheric neutral winds and temperatures obtained by a Fabry-Perot interferometer at Kototabang. Altitudes of the F layer (h′F) observed by ionosondes at Kototabang, Chiang Mai, and Chumphon were also surveyed. We found that the postmidnight FAIs occurred within plasma bubbles and coincided with kilometer-scale plasma density irregularities. We also observed an enhancement of the magnetically equatorward thermospheric neutral wind at the same time as the increase of h′F at low-latitude stations, but h′F at a station near the magnetic equator remained invariant. Simultaneously, a magnetically equatorward gradient of thermospheric temperature was identified at Kototabang. The convergence of equatorward neutral winds from the Northern and Southern Hemispheres could be associated with a midnight temperature maximum occurring around the magnetic equator. Equatorward neutral winds can uplift the F layer at low latitudes and increase the growth rate of Rayleigh-Taylor instabilities, causing more rapid extension of plasma bubbles. The equatorward winds in both hemispheres also intensify the eastward Pedersen current, so a large polarization electric field generated in the plasma bubble might play an important role in the generation of postmidnight FAIs. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | American Geophysical Union | |||||
| 言語 | en | |||||
| 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/10.1002/2017JA024048 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | EISSN | |||||
| 収録物識別子 | 2169-9402 | |||||
| 書誌情報 |
en : Journal of Geophysical Research-Space Physics 巻 122, 号 7, p. 7504-7518, 発行日 2017-07 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
