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First observation of presunset ionospheric F region bottom-type scattering layer
Li, Guozhu; Ning, Baiqi; Abdu, M. A.; Wan, Weixing; Wang, Chi; Yang, Guotao; Liu, Kangkang; Liu, Libo; Yan, Chunxiao; Li, GZ (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China.; Li, GZ (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2017
Volume122Issue:3Pages:3788-3797
ISSN2169-9380
Language英语
AbstractThe bottom-type irregularity scattering layer (BSL) that can appear in the ionospheric F region bottomside has been observed generally after sunset, serving as a possible telltale of equatorial spread F (ESF). Using simultaneous multibeam radar measurements over two low-latitude stations, Sanya (18.3 degrees N, 109.6 degrees E; dip latitude 13 degrees N) and Fuke (19.3 degrees N, 109.1 degrees E; dip latitude 14 degrees N) in China, we report, for the first time, a thin BSL that initially occurred at presunset (similar to 1720 LT), much earlier than the occurrence of BSL generated from the equatorial plasma shear vortex-driven instability. The presunset BSL was situated around 225km altitude and continued to exist until the appearance of ESF plumes after sunset (similar to 1930 LT). Interestingly, the Doppler velocities of the presunset BSL echoes measured by the radar and the F layer virtual heights obtained from the collocated Digisonde measurements over Sanya both show oscillations with a period of about 1 h, suggesting a close link between the occurrences of the BSL and of F region plasma density large-scale wave structure before sunset. These observations could imply an important role of gravity waves in the generation of the presunset F region bottom-type irregularities.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5844
Collection空间科学部
Corresponding AuthorLi, GZ (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China.; Li, GZ (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Li, Guozhu,Ning, Baiqi,Abdu, M. A.,et al. First observation of presunset ionospheric F region bottom-type scattering layer[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(3):3788-3797.
APA Li, Guozhu.,Ning, Baiqi.,Abdu, M. A..,Wan, Weixing.,Wang, Chi.,...&Li, GZ .(2017).First observation of presunset ionospheric F region bottom-type scattering layer.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(3),3788-3797.
MLA Li, Guozhu,et al."First observation of presunset ionospheric F region bottom-type scattering layer".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.3(2017):3788-3797.
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