DocumentCode :
126478
Title :
Climatological features of the maximum electron density of the ionospheric F2 layer (NmF2) in polar regions
Author :
Xu Sheng ; Zhang Beichen ; Liu Ruiyuan ; Guo Lixin ; Wu Yewen
Author_Institution :
Xidian Univ., Xi´an, China
fYear :
2014
fDate :
16-23 Aug. 2014
Firstpage :
1
Lastpage :
4
Abstract :
Climatological features of NmF2 are investigated and compared using long-term observations among the Arctic and Antarctic stations of Tromso (69.6N, 19.2E; CGM:66.7N, 102.2E), Longyearbyen (78.2N, 16.0E; CGM: 75.4N, 110.7E) and Zhongshan (69.4S, 76.4E; CGM:74.7S, 96.9E). Interesting results are presented as follows: The maximum value of NmF2 mainly occurs at local noon (LN) at the auroral latitude station Tromso, but at magnetic noon (MN) at the cusp latitude station Longyearbyen and between local noon and magnetic noon at Zhongshan. There is another peak just before magnetic midnight at Longyearbyen in winter during solar maximum years. An enhancement of NmF2 is also detected during 21-01 UT in winter at Tromso. There are semi-annual anomaly at Tromso and normal variability at both Longyerabyen and Zhongshan during solar minimum years. During solar maximum years there is semi-annual anomaly for all three stations. The winter anomaly is evident at Tromso and Zhongshan, but does not exist at Longyearbyen. It is demonstrated that in addition to the solar radiation the magnetosphere-ionosphere coupling processes, such as particle precipitation and plasma convection, play a significant role in the high latitude ionosphere.
Keywords :
F-region; climatology; electron density; magnetosphere; solar radiation; Antarctic station long-term observation; Arctic station long-term observation; Longyearbyen station; Longyerabyen normal variability; NmF2 climatological feature; NmF2 enhancement; Tromso station; Zhongshan normal variability; Zhongshan station; auroral latitude station; cusp latitude station; high latitude ionosphere; ionospheric F2 layer maximum electron density; local noon maximum NmF2 value; magnetic midnight; magnetic noon; magnetosphere-ionosphere coupling process; particle precipitation; plasma convection; polar region; semiannual anomaly; solar maximum year; solar minimum year; solar radiation; winter anomaly; winter season; Antarctica; Arctic; Ionization; Ionosphere; Magnetosphere; Plasmas; Solar radiation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
Type :
conf
DOI :
10.1109/URSIGASS.2014.6929844
Filename :
6929844
Link To Document :
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