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题名: Characteristics of convective structures of sodium layer in lower thermosphere (105–120 km) at Haikou (19.99°N, 110.34°E), China
作者: Jiao, Jing; Yang, Guotao; Wang, Jihong; Zhang, Tiemin; Peng, Hongyan; Xun, Yuchang; Liu, Zhengkuan; Wang, Chi
作者部门: 空间科学部
通讯作者: Yang, Guotao (gtyang@nssc.ac.cn)
刊名: Journal of Atmospheric and Solar-Terrestrial Physics
ISSN号: 1364-6826
出版日期: 2017
卷号: 164, 页码:132-141
收录类别: EI
英文摘要: The atmospheric sodium layer normally occurs in the mesopause (80–105 km) region, but rarely in the lower thermosphere region (>105 km) at low latitude. We observed a kind of peculiar sodium layer in lower thermosphere at Haikou (19.99°N, 110.34°E)—the thermospheric convective sodium layer (TCSL) in a lidargram. The TCSL's sodium density unstably developed over time and appeared as several discontinuous convective shapes vertically. It is the first time convective sodium layer observed in the lower thermosphere region (105–120 km). Based on Haikou lidar data, we obtained 14 TCSL events during 180 nights from March 2010 to August 2012. Most of the apogees of the TCSL events are higher than 108 km. A TCSL event lasts several hours and is composed of several convective structures, with each veitical shape lasting ∼5–30 min. All TCSL events occurred during spring and summer, and generally appear near midnight (22:00–00:00 LT). The TCSL has potential regional feature and appears to be related to the thermospheric sporadic E (Es) layers, winds, and field-aligned ionospheric irregularities (FAI). © 2017
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6025
Appears in Collections:空间科学部_期刊论文

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