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MICROWAVE SIGNATURE OF POLAR FIRN AND SEA ICE IN THE ANTARCTIC FROM AIRBORNE OBSERVATION
https://doi.org/10.15094/00003735
https://doi.org/10.15094/00003735ba5c9bd4-4e0a-4792-8675-c1a96f33db44
名前 / ファイル | ライセンス | アクション |
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KJ00000767889 (2.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1992-12-01 | |||||
タイトル | ||||||
タイトル | MICROWAVE SIGNATURE OF POLAR FIRN AND SEA ICE IN THE ANTARCTIC FROM AIRBORNE OBSERVATION | |||||
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 | 10.15094/00003735 | |||||
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) | |||||
論文名よみ | ||||||
その他のタイトル | MICROWAVE SIGNATURE OF POLAR FIRN AND SEA ICE IN THE ANTARCTIC FROM AIRBORNE OBSERVATION | |||||
著者名よみ |
ヤマノウチ, タカシ
× ヤマノウチ, タカシ× ワダ, マコト |
|||||
著者名(英) |
YAMANOUCHI, Takashi
× YAMANOUCHI, Takashi× WADA, Makoto |
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著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Airborne observations of 19.35 GHz microwave radiation were taken over the sea ice and firn cover of Antarctic ice sheet. Microwave brightness temperature was analyzed to explain satellite observations.As for the polar firn over the ice sheet, brightness temperature varied greatly from the coast to the interior, which noticeably corresponded to the mean annual accumulation obtained at the surface. Also found was the variation of brightness temperature on a small scale of about 1-10 km, which became extreme in the sastrugi/glazed surface zone (Z route), where the accumulation is variable. Calculated emissivity using the semi-empirical relation to the accumulation rate and physical temperature proposed in the past could not always explain the observed emissivity because of the limit of the theoretical relation, or shortage of measurements. Satellite passive microwave observations were of very low resolution, making it difficult to show these small scale great variations corresponding to the surface accumulation. In the sea ice area, the brightness temperatures observed were similar to the results from the satellite. Brightness temperature was low for multi-year ice and high for first year fast ice; the brightness temperature for new ice increases from a lower value and converges to the value of first year ice. From the flight across Riiser-Larsen Peninsula, smooth variation up to 225K was seen over the central part of the peninsula. This high value could be explained by the extremely high accumulation, which occurred asymmetrically against the height of the peninsula. Also along the flight, it was easy to distinguish the ice shelf and sea ice, even when covered with snow, by microwave brightness temperature measurement. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10756213 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology 巻 6, p. 16-35, 発行日 1992-12 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |