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Detection of large-scale concentric gravity waves from a Chinese airglow imager network
Lai Chang; Yue Jia; Xu Jiyao; Yuan Wei; Li Qinzeng; Liu Xiao; Lai, Chang (laichang@cqupt.edu.cn)
作者部门空间科学部
发表期刊Journal of Atmospheric and Solar-Terrestrial Physics
2017
ISSN1364-6826
语种英语
关键词Concentric Gravity Waves Large-scale Waves All-sky Imager Network Assembling Algorithm Low-pass Filtering Algorithm
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.
收录类别SCI ; EI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6068
专题空间科学部
通讯作者Lai, Chang (laichang@cqupt.edu.cn)
推荐引用方式
GB/T 7714
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.
APA Lai Chang.,Yue Jia.,Xu Jiyao.,Yuan Wei.,Li Qinzeng.,...&Lai, Chang .(2017).Detection of large-scale concentric gravity waves from a Chinese airglow imager network.Journal of Atmospheric and Solar-Terrestrial Physics.
MLA Lai Chang,et al."Detection of large-scale concentric gravity waves from a Chinese airglow imager network".Journal of Atmospheric and Solar-Terrestrial Physics (2017).
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