强磁暴、能量粒子暴与热层大气密度涨落之间的相关关系  

Relationship Between Severe Geomagnetic Storm,Energetic Particle Storms and Thermosphere Density Strong Disturbances

作　　者：秦国泰[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190

出　　处：《空间科学学报》2013年第1期39-47,共9页Chinese Journal of Space Science

基　　金：中国载人航天工程项目资助

摘　　要：利用1997-2007年由GOES8,GOES11和GOES12星载高能粒子探测器在地球同步轨道高度上所探测到的高能质子和高能电子通量探测数据以及高度560 km左右星载大气密度探测器所得的热层大气密度探测数据,统计分析了强地磁扰动、高能粒子通量跃变和热层大气密度涨落之间的相关关系,初步获得强地磁扰动期间,地球同步轨道(外辐射带外环)均出现了增幅大于三个数量级的高能质子通量(尤其是E>1 MeV)强增强现象,随后热层大气密度强烈上涨,表明三者之间是正相关关系.在时间上地球同步轨道高能质子通量强增强现象先于日均Ap值(地磁活动程度)上涨约一天左右,而热层大气密度强涨落现象又明显滞后于强地磁扰动事件.During severe geomagnetic storms, there are strong changes of high energy proton flux and high energy electron flux measured by high energy particle detectors in the geosynchronous orbit. Thermosphere density will follow strong changes in the LEO orbit. Generally, the thermosphere den- sity increased by the enhancement of the solar F10.7 flux and the energy particle flux, however, which energy particles （e.g. proton or electron） and which particle energies （e.g. E 〉 2 MeV relativistic electrons or E 〈 50 keV low energies electrons） plays an important role during severe geomagnetic storms. This paper discussed the relationship between severe geomagnetic storm, energy particle storm and thermosphere density from the in-situ measurement data of energy particles from GOES8, GOESll and GOES12 high energy particle detectors （from 1997 to 2007）, and the thermosphere den- sity data from Chinese satellite-borne density detectors （in 2005）. The relevant results reveal thatduring severe geomagnetic storms, high energy proton flux of E 〉 1MeV showed strong enhance- ment, with the change ratio ≥103. After one day the thermosphere density strong enhancement follow the variations of the high energy proton flux of E 〉 1 MeV and between severe geomagnetic activity, high energy proton flux and thermosphere density exhibits an obvious positive correlation, that is before the severe geomagnetic storm （near 1 day）, the high energy proton flux showed strong enhancement in the geosynchronous orbit, and after the severe geomagnetic storm （delay 3～6 h）, the thermosphere density obviously increases.

关 键 词：地磁扰动 能量粒子 大气密度 

分 类 号：P353[天文地球—空间物理学]