Detection of large-scale concentric gravity waves from a Chinese airglow imager network

	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)
刊名	Journal of Atmospheric and Solar-Terrestrial Physics
	2017
关键词	Concentric Gravity Waves Large-scale Waves All-sky Imager Network Assembling Algorithm Low-pass Filtering Algorithm
ISSN号	1364-6826
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
源URL	[http://ir.nssc.ac.cn/handle/122/6068]
专题	国家空间科学中心_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).