Height and time characteristics of seasonal and diurnal variations in PMWE based on 1 year observations by the PANSY radar (69.0°S, 39.6°E)
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- Takanori Nishiyama
- National Institute of Polar Research Tachikawa Japan
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- Kaoru Sato
- Department of Earth and Planetary Science University of Tokyo Tokyo Japan
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- Takuji Nakamura
- National Institute of Polar Research Tachikawa Japan
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- Masaki Tsutsumi
- National Institute of Polar Research Tachikawa Japan
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- Toru Sato
- Department of Communications and Computer Engineering Kyoto University Kyoto Japan
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- Masashi Kohma
- Department of Earth and Planetary Science University of Tokyo Tokyo Japan
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- Koji Nishimura
- National Institute of Polar Research Tachikawa Japan
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- Yoshihiro Tomikawa
- National Institute of Polar Research Tachikawa Japan
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- Mitsumu K. Ejiri
- National Institute of Polar Research Tachikawa Japan
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- Takuo T. Tsuda
- Department of Communication Engineering and Informatics University of Electro‐Communications Tokyo Japan
書誌事項
- 公開日
- 2015-04-03
- 資源種別
- journal article
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/2015gl063349
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>We report height and time variations in polar mesosphere winter echoes (PMWE) based on the Program of the Antarctic Syowa mesosphere‐stratosphere‐troposphere/incoherent scatter (PANSY) radar observations. PMWE were identified for 110 days from March to September 2013. PMWE occurrence frequency increased abruptly in May when two solar proton events occurred. PMWE were also observed even during periods without any solar proton events, suggesting that a possible cause of the PMWE is ionization by energetic electron precipitations. The monthly mean PMWE characteristics showed that occurrence of PMWE were mainly restricted to sunlit time. This fact indicates that electrons detached from negatively charged particles play an important role. While PMWE below 72 km in altitude completely disappeared before sunset, it was detected above that altitude for a few hours even after sunset. This height dependence in the altitude range of 60–80 km can be explained qualitatively by empirical effective recombination rates.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 42 (7), 2100-2108, 2015-04-03
American Geophysical Union (AGU)
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詳細情報 詳細情報について
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- CRID
- 1360004229803736064
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- ISSN
- 19448007
- 00948276
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE
