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An examination of the humidity correction by Vaisala RS80-A radiosondes for experiments and measurements at an inland Antarctic station
https://doi.org/10.15094/00002964
https://doi.org/10.15094/0000296478cdcec2-4172-4866-800b-d6023433d031
名前 / ファイル | ライセンス | アクション |
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KJ00000043837 (875.1 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2003-11-01 | |||||
タイトル | ||||||
タイトル | An examination of the humidity correction by Vaisala RS80-A radiosondes for experiments and measurements at an inland Antarctic station | |||||
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 | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00002964 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Hirasawa, Naohiko
× Hirasawa, Naohiko× Hayashi, Masahiko× Yamanouchi, Takashi |
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著者所属(英) | ||||||
言語 | en | |||||
値 | National Institute of Polar Research | |||||
著者所属(英) | ||||||
言語 | en | |||||
値 | Fukuoka University | |||||
著者所属(英) | ||||||
言語 | en | |||||
値 | National Institute of Polar Research | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The present paper examines the correction of humidity measurements by the Vaisala RS80-A radiosonde using data obtained at Dome Fuji Station, inland Antarctica. The correction method is based upon a procedure developed by L.M. Miloshevich et al.(J. Atmos. Oceanic Technol., 18, 135, 2001). In the present study, experiments in a snow cave below ground, where a state of ice saturation is assumed, show that Miloshevich's coefficient is appropriate for temperatures warmer than -45 °C because the corrected humidity reflects the state of ice saturation. Below these temperatures a correction coefficient is needed. At -55 °C , for example, a factor of 1.2 is needed. An examination using surface humidity data obtained from a routine aerological observation concluded that the correction coefficient is larger than Miloshevich's at temperatures colder than -50 °C , so that the multiplication factor(0.185968×exp((-0.0339)×T); T=temperature) is needed to apply Miloshevich's coefficient. After the correction is performed, the relative humidity with respect to ice becomes 150 on average in the lower temperature range. Perpetual falling of ice crystals indicates at least an occurrence of ice saturation; this condition of high relative humidity is supported by downwelling of a large amount of water vapor in an intense temperature inversion layer and an extremely small number of ice nuclei, suggested by in-situ data. An improved correction applied to a vertical profile in the temperature inversion layer reveals that supersaturation with respect to ice appears at all levels. In the lowest layer, humidity increases with decreasing height, although observed data show steep dryness with decreasing height. This is considered a measurement error. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1129795X | |||||
書誌情報 |
Polar meteorology and glaciology 巻 17, p. 94-102, 発行日 2003-11 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |