A theoretical model of gravity wave propagation based on the transfer function

	A theoretical model of gravity wave propagation based on the transfer function
	Sun Ling-Feng ; Wan Wei-Xing ; Ding Feng ; Mao Tian
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2006-07-01
卷号	49 期号:4 页码:957-964
关键词	gravity wave transfer function unit impulse ionospheric disturbances filter
ISSN号	0001-5733
文献子类	Article
英文摘要	In order to study the relationship between the excitation source of gravity wave in the troposphere and the response of ionosphere, a theoretic model of gravity wave propagation based on the complex dispersion relation of internal gravity wave and the conception of transfer function has been built in a dissipative atmosphere which includes viscosity and heat conductivity. In the paper the amplitude of transfer function is discussed in the frequency domain. Through analyzing a case of unit impulse, we obtain the distribution of a certain physical quantity in time and space from earth's surface to 300 kin above. The results reveal that the atmosphere behaves like a filter which offers the easy passage to some gravity waves whose periods range from 15 min to 30 min and the horizontal wave lengths are between 200 km and 450 kin. The response of ionosphere occurs at a large horizontal distance from the source. The viscosity and the conductivity coefficients of atmosphere have small influence in the low atmosphere, but it becomes greater with increasing of height. The frequency obtained by the transfer function model is consistent with that from Row's theory in the low atmosphere, but they differ much in the high atmosphere.
WOS关键词	TRAVELING IONOSPHERIC DISTURBANCES ; SEVERE WEATHER ; ATMOSPHERE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000239222700005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67162]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun Ling-Feng
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun Ling-Feng,Wan Wei-Xing,Ding Feng,et al. A theoretical model of gravity wave propagation based on the transfer function[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2006,49(4):957-964.
APA	Sun Ling-Feng,Wan Wei-Xing,Ding Feng,&Mao Tian.(2006).A theoretical model of gravity wave propagation based on the transfer function.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,49(4),957-964.
MLA	Sun Ling-Feng,et al."A theoretical model of gravity wave propagation based on the transfer function".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49.4(2006):957-964.