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Comparing the diurnal variations in the SuperMAG auroral electrojet indices SML and SMU
Wang, Yuan; Du, Aimin; Chen, Gengxiong; Cao, Xin; Zhang, Ying; Li, Min; Liu, Xiaocan; Guo, Jianpeng; Du, AM (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Ionospher Environm, Beijing 100029, Peoples R China.
Department空间科学部
Source PublicationCHINESE SCIENCE BULLETIN
2014
Volume59Issue:29-30Pages:3877-3883
ISSN1001-6538
Language英语
KeywordAuroral Electrojet Supermag Diurnal Variation Sml Index Smu Index
AbstractDiurnal variations of the SuperMAG auroral electrojet indices (SML and SMU) were examined for the period of 1980-2010, and the differences between SML and SMU were especially analyzed. The diurnal variation of SML with a maximum at around 1100 UT has a prenoon-postnoon asymmetry. At solstices, the diurnal variation of SML is much stronger than that at equinoxes. For the SMU, two maxima are recorded in the diurnal variation with the bigger one at 1700 UT and the smaller one at 0400 UT. The seasonal variations are not obvious in the UT variation characteristics of SMU although the intensity of SMU is changed remarkably season by season. For both SML and SMU, the contributing stations are located at higher geomagnetic latitude around 1600 UT and at lower geomagnetic latitude around 0400 UT. These results indicate that: (1) the SML is mostly controlled by the convection electric field. Its diurnal variation is mainly correlated with the equinoctial and R-M hypothesis; (2) the SMU is largely controlled by the ionospheric conductance. Its diurnal variation is tightly correlated with the solar radiation.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4488
Collection空间科学部
Corresponding AuthorDu, AM (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Ionospher Environm, Beijing 100029, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Yuan,Du, Aimin,Chen, Gengxiong,et al. Comparing the diurnal variations in the SuperMAG auroral electrojet indices SML and SMU[J]. CHINESE SCIENCE BULLETIN,2014,59(29-30):3877-3883.
APA Wang, Yuan.,Du, Aimin.,Chen, Gengxiong.,Cao, Xin.,Zhang, Ying.,...&Du, AM .(2014).Comparing the diurnal variations in the SuperMAG auroral electrojet indices SML and SMU.CHINESE SCIENCE BULLETIN,59(29-30),3877-3883.
MLA Wang, Yuan,et al."Comparing the diurnal variations in the SuperMAG auroral electrojet indices SML and SMU".CHINESE SCIENCE BULLETIN 59.29-30(2014):3877-3883.
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