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Study on Generation Mechanism and Dynamics of Auroral Phenomena in Northern and Southern Hemispheres

南北半球极光现象发生机制及动力学研究

基本信息

批准号：
61460051
负责人：
HIRASAWA Takeo
金额：
$ 4.93万
依托单位：
National Institute of Polar Research (NIPR)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

项目摘要

Generation mechanism and dynamics of the auroral phenomena were studied by using a computer aided digital data base. During the period of this research project which was started in 1986 for three years, many scientific results were presented through the regular scientific meetings and journal publications by the scientific society for the upper atmosphere physics. There were three main scientific products by this project. The first, relationship between the auroral emission and precipitating auroral particles were examined in detail with respect to the particle species as well as energy spectrum. We found clear difference of appearance regions of electron and proton auroras in the evening side of the auroral oval. We also found that the conjugacy of auroral displais in norhern and southern hemispheres depends much on the auroral activity itself. The second, we established the statistical morphology of the ULF and VLF disturbances associanted with auroras. Because our data base cover the simultaneous observations in both hemispheres we could show clear daily and seasonal variations of ULF and VLF activities. We also showed the solar cycle modulation of their activities. The third, we tried to apply our auroral data base to examine the other special observation results such as X-ray imaging observation on board a scientific balloon, and CNA observation with high spatial resolution which was installed at Syowa Station.

利用计算机辅助数字数据库，对极光现象的产生机制和动力学进行了研究。该研究项目于1986年开始，为期三年，在此期间，通过高层大气物理学科学学会定期举行的科学会议和期刊发表，提出了许多科学成果。该项目有三个主要的科学产品。首先，从粒子种类和能谱两个方面详细分析了极光发射与极光粒子沉降之间的关系。在极光卵的黄昏侧，电子极光和质子极光的出现区域有明显的差异。我们还发现南北半球极光的共轭性很大程度上取决于极光活动本身。其次，我们建立了与极光有关的ULF和VLF扰动的统计形态学。由于我们的数据库涵盖了两个半球的同时观测，我们可以清楚地显示ULF和VLF活动的日变化和季节变化。我们还显示了太阳周期调制的活动。第三，我们试图将我们的极光数据库应用于其他特殊的观测结果，如科学气球上的X射线成像观测，以及在昭和站安装的高空间分辨率的CNA观测。