Poleward moving auroral forms (PMAFs) observed at the Yellow River Station: A statistical study of its dependence on the solar wind conditions
Poleward moving auroral forms (PMAFs) observed at the Yellow River Station: A statistical study of its dependence on the solar wind conditions
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黄河站观测到的向极移动的极光形态（PMAF）：其对太阳风条件依赖性的统计研究
DOI：
10.1016/j.jastp.2012.06.004
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发表时间：
2012-09
影响因子：
1.9
通讯作者：
D. H. Huang
中科院分区：
文献类型：
--
作者：
D. S. Han;Z. S. Wu;Z. J. Hu;Q. H. Zhang;Y. Kamide;H. Q. Hu;B. C. Zhang;J. M. Liu;D. H. Huang
利用中国黄河站（78.92°N，11.93°E）的三波长全天空连续光学观测资料，统计研究了北极地区向极移动极光型（PMAF）。特别是，我们研究了在0900-1500 MLT的磁当地时间（MLT）范围内的PMAF发生太阳风条件的依赖性。与以前的研究相比，我们更大的PMAFs数据库使我们能够研究PMAFs的发生如何取决于不同MLT扇区中的每个行星际磁场（IMF）分量。结果发现，59%，60%，和57%的PMAF事件发生在IMF条件下的负Bz，正的，和负的Bx，分别。我们还发现，PMAF表现出优先发生在大IMF下的趋势|BX|条件PMAFs的MLT依赖性在中午呈现出显著的下降趋势，表现出明显的与IMF By相关的前午-后午不对称性，这与磁场张力释放导致的重连通量管运动相一致。然而，我们第一次发现，在Bz>0的条件下比Bz<0的条件下，不对称性更明显，这表明了叶重联效应的重要性。我们的统计结果表明，PMAF不是由太阳风压力脉冲引起的，而是由磁重联爆发引起的。
Poleward moving auroral forms (PMAFs) are statistically investigated by using continuous, high-quality, optical observations for six winters obtained from three-wavelength all-sky imagers at the Chinese Yellow River Station (78.92°N, 11.93°E), Svalbard, in the Arctic. In particular, we examined the dependence of the PMAF occurrence on solar wind conditions in the magnetic local time (MLT) range of 0900–1500 MLT. Comparing to the previous studies, our larger PMAFs data base enables us to examine how the PMAFs’ occurrence depends on each interplanetary magnetic field (IMF) component in different MLT sectors. It was found that 59%, 60%, and 57% of the PMAF events occurred under IMF conditions of negative Bz, positive By, and negative Bx, respectively. We also found that the PMAFs show a tendency to occur preferentially under large IMF |Bx| conditions. The MLT dependence of PMAFs presents a remarkable tendency of decreasing in the midday sector, showing a clear IMF By-related prenoon–postnoon asymmetry, which is consistent with the motion of reconnected flux tubes due to the release of magnetic field tension. For the first time, we found, however, that the asymmetry is more evident during conditions of Bz>0 than Bz<0, suggesting the importance of the effect of the lobe reconnection. Our statistical results suggest that the PMAFs are not caused by the solar wind pressure pulses, but by bursts of magnetic reconnection.
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影响因子：
1.9
作者：
V. Safargaleev;A. Kozlovsky;T. Sergienko;T. Yeoman;M. Uspensky;D. Wright;H. Nilsson;T. Turunen;A. Kotikov
通讯作者：
V. Safargaleev;A. Kozlovsky;T. Sergienko;T. Yeoman;M. Uspensky;D. Wright;H. Nilsson;T. Turunen;A. Kotikov
DOI：
10.1029/ja095ia02p01039
发表时间：
1990-02
期刊：
--
影响因子：
--
作者：
P. Sandholt;M. Lockwood;T. Oguti;S. Cowley;K. Freeman;B. Lybekk;A. Egeland;D. Willis
通讯作者：
P. Sandholt;M. Lockwood;T. Oguti;S. Cowley;K. Freeman;B. Lybekk;A. Egeland;D. Willis
DOI：
10.1016/j.jastp.2010.03.005
发表时间：
2010-05
影响因子：
1.9
作者：
Zejun Hu;Huigen Yang;Jimin Liang;Desheng Han;D. Huang;Hongqiao Hu;Beichen Zhang;Rui-yuan Liu;Z. Chen
通讯作者：
Zejun Hu;Huigen Yang;Jimin Liang;Desheng Han;D. Huang;Hongqiao Hu;Beichen Zhang;Rui-yuan Liu;Z. Chen
影响因子：
--
作者：
M. Lockwood;M. Wild
通讯作者：
M. Lockwood;M. Wild
影响因子：
--
作者：
M. Lockwood
通讯作者：
M. Lockwood