| Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999 |
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| 作者姓名： | 艾勇 邓晓华 刘瑞源 杨惠根 |
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| 作者单位： | Ai Yong，Deng Xiaohua，Liu Ruiyuan Yang Huigen and Masayuki Kikuchi 3 1 College of Electronic Information，Wuhan University，Wuhan 430079，China 2 Polar Research Institute of China，Shanghai 200129，China 3 National Institute of Polar R |
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| 基金项目： | ThisprojectwassupportedbytheNationalNaturalScienceFounda tionofChina (No .40 0 44 0 1 3 ) . |
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| 摘 要： | 1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅａｆｔｅｒｎｏｏｎｒｅｇｉｏｎ (ａｐｐｒｏｘｉｍａｔｅｌｙ 1 4 0 0ｔｏ 1 60 0ＭＬＴ)ｈａｓａｓｐｅｃｉａｌｓｉｇｎｉｆｉｃａｎｃｅｆｏｒａｖａｒｉｅｔｙｏｆｍａｇｎｅｔｏｓｐｈｅｒｉｃｐｈｅｎｏｍｅｎａ.Ｉｔｓｐｒｏｘｉｍｉｔｙｔｏｍａｇｎｅｔｉｃｎｏｏｎｓｕｇｇｅｓｔｓｔｈａｔｔｈｅａｕｒｏｒａｌｐｈｅｎｏｍｅｎａｏｂｓｅｒｖｅｄｍａｙｂｅｒｅｌａｔｅｄｔｏｄａｙｓｉｄｅｍａｇｎｅｔｏｓｐｈｅｒｉｃｐｒｏｃｅｓｓｅｓ ,ａｎｄｉｎｄｅｅｄａｖａｒｉｅｔｙｏｆｓｔｕ…
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Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999 |
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| Masayuki Kikuchi.Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999[J].Chinese Journal of Polar Science,2002,13(1). |
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| Authors: | Masayuki Kikuchi |
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| Abstract: | In this paper we use the high speed multi channel meridian scanning photometer data and all sky TV camera images to analyze the intensity variations of the postnoon auroral bright sports of 557.7 nm and 630.0 nm emissions. Several results can be obtained from this paper. (1) Bright spots are rather transient features lasting typically for only a few minutes. (2) The intensity of the postnoon bright spots of 557.7 nm emissions can surpass 11 kR. The occurrence of the bright spots seems rather frequent. (3) The ratios of I(427.8)/I(630.0) and I(427.8)/I(557.7) during the bright spots occurring time show a positive peak and negative peak respectively. It qualitatively indicates that the average precipitating electron energies along the meridianal scan above Zhongshan Station increased as the bright spot appeared. And the intensification of the spot mainly was caused by the increasing of high energy (3 10 keV) flux. (4) Usually the bright spots are accompanied with the magnetic pulsation and the occurrence of multi band arcs. |
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| Keywords: | aurora bright spots intensity Zhongshan Station |
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