科研之友
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摘要
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.
- 出版日期2013-7
- 单位中国极地研究中心; 西安电子科技大学
