The intensity ratio I (557.7 nm)/I (427.8 nm) at Zhongshan Station in Antarctica

作     者：HU Guoyuan AI Yong ZHANG Hong 

作者机构：Wuhan University Wuhan 430070 China 

出 版 物：《Advances in Polar Science》 (极地科学进展（英文版）)

年 卷 期：2012年第23卷第1期

页      面：9-11页

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 081601[工学-大地测量学与测量工程] 080501[工学-材料物理与化学] 0816[工学-测绘科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：funded by the Polar Science Strategic Research Fund of the Chinese Arctic and Antarctic Administration SOA (Grant no. 20080212) 

主　　题：Auroral substorm intensity ratio electron 

摘      要：Auroral intensity ratios at Zhongshan Station in Antarctica on 8 April 1999 are studied, along with variations in pene- trated electron energy. Ratios of/（557.7 nm）/I （427.8 nm） during the quiet period were from 5 to 22, and I （630.0 nm） / I （427.8 rim） ranged from 1 to 2.76. These variations were not caused by changes of atomic oxygen concentration, but rather by penetrated electron energy variability, or other mechanisms. Ratios decreased sharply during the auroral substorm, ranging from 1.66--6.5 and 0.071-1, respectively, mainly because of the increase in penetrated electron energy. At the onset of the substorm, the ratios reached their minima. This means that penetrated electron energy was maximized. When the substorm weakened, the penetrated electron energy returned to the pre-substorm level.