Comparative study on characteristics of spread-F at low- and   mid-latitudes during high and low solar activities over East Asia

doi:10.6038/cjg20170901

CORC > 北京大学 > 地球与空间科学学院

	Comparative study on characteristics of spread-F at low- and mid-latitudes during high and low solar activities over East Asia
	Guo Bing ; Xiao Sai-Guan ; Shi Jian-Kui ; Xiao Zuo ; Wang Guo-Jun ; Cheng Zheng-Wei ; Shang She-Ping ; Wang Zheng ; Suo Yu-Cheng
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017
关键词	Spread-F Low-and mid-latitude ionosphere Solar activity Seasonal variation Local time variation EQUATORIAL SCINTILLATIONS DENSITY IRREGULARITIES NEUTRAL WINDS REGION IONOSPHERE STORM MORPHOLOGY EVOLUTION RELEVANT VELOCITY
DOI	10.6038/cjg20170901
英文摘要	In this work, we analyze the ionosonde data sets from the low-latitude station, Hainan, and mid-latitude stations, Changchun and Urumqi. Then we conduct comparison of low and mid-latitude spread-F occurrence rates during high and low solar activities. The results of spread-F occurrence rates include two aspects: (1) The maximum spread-F occurrence rates over both low- and mid-latitudes during low solar activity are larger than those during high solar activity. (2) During both high and low solar activities, the maximum occurrence rate over low latitudes is greater than that over mid-latitudes. In addition, there are also some detailed characteristics of spread-F occurrence. (1) Double-peak structure exists in spread-F occurrence during high and low solar activities over all three stations. During the equinox months of the high solar activity, the two occurrence peaks over the low-latitude station occur in pre-midnight, whereas those during the solstices over mid-latitude stations of Changchun and Urumqi occur in the post-midnight period. During low solar activity, the two peaks appear in the solstices over both low- and mid-latitude stations. Over Hainan, the main peak during summer occurs around midnight and the sub-peak during winter occurs at post-midnight. Over Changchun and Urumqi, the two peaks occur at post-midnight. (2) Differences also exist in the detailed double-peak structure. First, the main peak over low-latitude occurs in vernal equinoctial months during high solar activity, but the maximum occurrence rates in February and April are relatively high and closer; the spread-F tends to occur in summer during low solar activity over Hainan, but the maximum occurrence rates in May and July are also relatively high and closer. During high and low solar activities, the main peak values over low-latitudes are very close, but have notable differences over mid-latitudes. In sum, a detailed analysis and comparison on characteristics of spread-F over the low-latitude station, Hainan and mid-latitude stations, Changchun and Urumqi, are presented in this paper.; SCI(E); ARTICLE; 9; 3289-3300; 60
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471096]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Guo Bing,Xiao Sai-Guan,Shi Jian-Kui,et al. Comparative study on characteristics of spread-F at low- and mid-latitudes during high and low solar activities over East Asia[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017.
APA	Guo Bing.,Xiao Sai-Guan.,Shi Jian-Kui.,Xiao Zuo.,Wang Guo-Jun.,...&Suo Yu-Cheng.(2017).Comparative study on characteristics of spread-F at low- and mid-latitudes during high and low solar activities over East Asia.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION.
MLA	Guo Bing,et al."Comparative study on characteristics of spread-F at low- and mid-latitudes during high and low solar activities over East Asia".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION (2017).