极地研究(英文版)2002，Vol.13Issue(1)：15-22,8.
Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999
Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999
摘要
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.关键词
aurora/bright spots/intensity/Zhongshan StationKey words
aurora/bright spots/intensity/Zhongshan Station分类
天文与地球科学引用本文复制引用
..Intensity variations of the postnoon auroral bright spots observed at Zhongshan Station, Antarctica on August 8, 1999[J].极地研究(英文版),2002,13(1):15-22,8.基金项目
This project was supported by the National Natural Science Foundation of China (No. 40044013). （No. 40044013）
