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Influence of interplanetary magnetic field and solar wind on auroral brightness in different regions
Yang, Y. F.; Lu, J. Y.; Wang, J. -S.; Peng, Z.; Zhou, L.; Lu, JY (reprint author), China Meteorol Adm, Natl Ctr Space Weather, Beijing 100081, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2013
Volume118Issue:1Pages:209-217
ISSN2169-9380
Language英语
AbstractBy integrating and averaging the auroral brightness from Polar Ultraviolet Imager auroral images, which have the whole auroral ovals, and combining the observation data of interplanetary magnetic field (IMF) and solar wind from NASA Operating Missions as a Node on the Internet (OMNI), we investigate the influence of IMF and solar wind on auroral activities, and analyze the separate roles of the solar wind dynamic pressure, density, and velocity on aurora, respectively. We statistically analyze the relations between the interplanetary conditions and the auroral brightness in dawnside, dayside, duskside, and nightside. It is found that the three components of the IMF have different effects on the auroral brightness in the different regions. Different from the nightside auroral brightness, the dawnside, dayside, and duskside auroral brightness are affected by the IMF B-x, and B-y components more significantly. The IMF B-x and B-y components have different effects on these three regional auroral brightness under the opposite polarities of the IMF B-z. As expected, the nightside aurora is mainly affected by the IMF B-z, and under southward IMF, the larger the vertical bar B-z vertical bar, the brighter the nightside aurora. The IMF B-x and B-y components have no visible effects. On the other hand, it is also found that the aurora is not intensified singly with the increase of the solar wind dynamic pressure: when only the dynamic pressure is high, but the solar wind velocity is not very fast, the aurora will not necessarily be intensified significantly. These results can be used to qualitatively predict the auroral activities in different regions for various interplanetary conditions. Citation: Yang, Y. F., J. Y. Lu, J.-S. Wang, Z. Peng, and L. Zhou (2013), Influence of interplanetary magnetic field and solar wind on auroral brightness in different regions, J. Geophys. Res. Space Physics, 118, 209-217, doi:10.1029/2012JA017727.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4967
Collection空间科学部
Corresponding AuthorLu, JY (reprint author), China Meteorol Adm, Natl Ctr Space Weather, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Yang, Y. F.,Lu, J. Y.,Wang, J. -S.,et al. Influence of interplanetary magnetic field and solar wind on auroral brightness in different regions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(1):209-217.
APA Yang, Y. F.,Lu, J. Y.,Wang, J. -S.,Peng, Z.,Zhou, L.,&Lu, JY .(2013).Influence of interplanetary magnetic field and solar wind on auroral brightness in different regions.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(1),209-217.
MLA Yang, Y. F.,et al."Influence of interplanetary magnetic field and solar wind on auroral brightness in different regions".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.1(2013):209-217.
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