Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999

Yong, Ai and Xiaohua, Deng and Ruiyuan, Liu and Huigen, Yang and Kikuchi, M. (2002) Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999. Advances in Polar Science, 13 (1). pp. 15-22.

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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 meridian scan above Zhongshan Station increased as the bright sport 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.

Item Type:	Article
Related URLs:
Keywords:	aurora, bright spots, intensity, Zhongshan Station.
Subjects:	Unspecified
Organizations:	Unspecified
Date Deposited:	04 May 2023 13:38
URI:	http://library.arcticportal.org/id/eprint/2230

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