globalchange  > 气候减缓与适应
DOI: 10.1029/2017JA024883
Scopus记录号: 2-s2.0-85050264649
论文题名:
Sudden Sodium Layers: Their Appearance and Disappearance
作者: Qiu S.; Soon W.; Xue X.; Li T.; Wang W.; Jia M.; Ban C.; Fang X.; Tang Y.; Dou X.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:6
起始页码: 5102
结束页码: 5118
语种: 英语
英文关键词: gravity wave ; icy-dust model ; sporadic sodium layers ; temperature-controlled theory ; wind field
英文摘要: Temperature variation has been proposed to play an important role in the formation of the sporadic sodium layers (SSLs or NaS) in subtropic area, based on the observed significant correlation between SSLs and high temperatures. The icy-dust particle, which could form in the extremely cold conditions and act as absorbers of sodium species, was proposed to be a possible candidate for the sodium reservoir of the SSLs. In this study, the University of Science and Technology of China temperature/wind lidar and the sodium fluorescence lidar at a subtropic station Hefei (31°N, 117°E), China, were used to observe sodium density, temperature, and wind profiles simultaneously throughout the SSL events. Based on the observations of two SSLs occurring on 12 and 13 May 2013, the possibility of an icy-dust layer existing and acting as the sodium reservoir is tested for the first time in details. Both events experienced an extremely cold temperature (<150 K) several hours before the onset of SSLs, followed by a subsequently fast production of sodium atoms during a large temperature enhancement (>40 K). An empirical model including two main steps is then proposed: first, sodium species are collected by an icy-dust reservoir and stored during the extremely cold phase; second, free sodium atoms could be released from the reservoir by a possible trigger. As a result, this kind of SSLs could possibly be regarded as a quasi-continuous phenomenon caused and modulated by temperature variations with an icy-dust model that can exhibit intermittent time variations related to the water vapor concentration. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113821
Appears in Collections:气候减缓与适应

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作者单位: Department of Geophysics, College of the Geology Engineering and Geomatics, Chang'an University, Xi'an, China; Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, China; Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States; Gravity and Magnetic Institute, Chang'an University, Xi'an, China; Key Laboratory of Western China's Mineral Resources and Geological Engineering, China Ministry of Education, Xi'an, China; Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Qiu S.,Soon W.,Xue X.,et al. Sudden Sodium Layers: Their Appearance and Disappearance[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)
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