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题名: Detection of large-scale concentric gravity waves from a Chinese airglow imager network
作者: Lai Chang; Yue Jia; Xu Jiyao; Yuan Wei; Li Qinzeng; Liu Xiao
作者部门: 空间科学部
通讯作者: Lai, Chang (laichang@cqupt.edu.cn)
关键词: Concentric gravity waves ; Large-scale waves ; All-sky imager network ; Assembling algorithm ; Low-pass filtering algorithm
刊名: Journal of Atmospheric and Solar-Terrestrial Physics
ISSN号: 1364-6826
出版日期: 2017
收录类别: SCI ; EI
英文摘要: Concentric gravity waves (CGWs) contain a broad spectrum of horizontal wavelengths and periods due to their instantaneous localized sources (e.g., deep convection, volcanic eruptions, or earthquake, etc.). However, it is difficult to observe large-scale gravity waves of >100 km wavelength from the ground for the limited field of view of a single camera and local bad weather. Previously, complete large-scale CGW imagery could only be captured by satellite observations. In the present study, we developed a novel method that uses assembling separate images and applying low-pass filtering to obtain temporal and spatial information about complete large-scale CGWs from a network of all-sky airglow imagers. Coordinated observations from five all-sky airglow imagers in Northern China were assembled and processed to study large-scale CGWs over a wide area (1800 km × 1 400 km), focusing on the same two CGW events as Xu et al. (2015). Our algorithms yielded images of large-scale CGWs by filtering out the small-scale CGWs. The wavelengths, wave speeds, and periods of CGWs were measured from a sequence of consecutive assembled images. Overall, the assembling and low-pass filtering algorithms can expand the airglow imager network to its full capacity regarding the detection of large-scale gravity waves. © 2017 Elsevier Ltd.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6068
Appears in Collections:空间科学部_期刊论文

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Recommended Citation:
Lai Chang,Yue Jia,Xu Jiyao,et al. Detection of large-scale concentric gravity waves from a Chinese airglow imager network[J]. Journal of Atmospheric and Solar-Terrestrial Physics,2017.
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