A parameter model of auroral emissions and particle precipitation near magnetic noon
A parameter model of auroral emissions and particle precipitation near magnetic noon
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磁正午附近极光发射和粒子降水的参数模型
DOI：
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发表时间：
2013
期刊：
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通讯作者：
Hu Hong-Qiao
中科院分区：
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作者：
Xing Zan-Yang;Yang Hui-Gen;Wu Zhen-Sen;Hu Ze-Jun;Liu Jun-Ming;Zhang Qing-He;Hu Hong-Qiao
极光是日地相互作用产生的粒子降水进入极地电离层的动态过程最显着的可见现象之一，对于了解地球环境和预测空间天气具有重要作用。利用北极黄河站（YRS）三波长全天空成像仪获得的高时间分辨率光学数据，结合DMSP卫星测量的粒子降水数据，研究了极光与极光降水之间的定量关系。统计结果表明，10—13MLT期间，磁正午附近以软极光电子沉淀为主，极光发射波长为630.0 nm。在13—14MLT扇区，随着427.8 nm强度的增加，I(630.0 nm)/I(427.8 nm)比值减小，表明析出粒子的能量为另外，427.8 nm的强度取决于沉淀电子的总能通量，I(630.0 nm)/I(427.8 nm)比值与平均能量有关。我们建立了YRS磁正午附近极光发射和粒子降水的参数模型，为未来空间天气监测提供依据。
The aurora is one of the most significant visible manifestations of the dynamic processes associated with the precipitation of particles into the polar ionosphere generated by the solar-terrestrial interactions,which has played an important role in understanding our Earth′s environment and predicting the space weather.Using high temporal resolution optical data obtained from the three-wavelength all-sky imagers at Yellow River Station(YRS) in the Arctic,together with the particle precipitation data measured by the DMSP satellites,we investigated the quantitative relationship between the auroral intensities and the energy features of the precipitated particles near magnetic noon.The statistical results indicated that the soft auroral electron precipitation was dominated near magnetic noon during 10—13MLT with 630.0 nm auroral emissions.The I(630.0 nm)/I(427.8 nm) ratio decreased as the intensity of 427.8 nm increased in the 13—14MLT sector,suggesting the energy of the precipitated particles was getting higher.In addition,the intensity of 427.8 nm was dependent on the total energy flux of the precipitating electrons and the I(630.0 nm)/I(427.8 nm) ratio was related to the average energy.We have built a parameter model of auroral emissions and particle precipitation near magnetic noon at YRS,which will serve to monitor the space weather in the future.