气候变化领域集成服务门户(CCPortal): Decay times of atmospheric acoustic-gravity waves after deactivation of wave forcing

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DOI	10.5194/acp-22-13713-2022
	Decay times of atmospheric acoustic-gravity waves after deactivation of wave forcing
	Gavrilov, Nikolai M.; Kshevetskii, Sergey P.; Koval, Andrey, V
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13713
结束页码	13724
卷号	22 期号:20 页码:12
英文摘要	High-resolution numerical simulations of non-stationary, nonlinear acoustic-gravity waves (AGWs) propagating upwards from surface wave sources are performed for different temporal intervals relative to activation and deactivation times of the wave forcing. After activating surface wave sources, amplitudes of AGW spectral components reach a quasi-stationary state. Then the surface wave forcing is deactivated in the numerical model, and amplitudes of vertically traveling AGW modes quickly decrease at all altitudes due to discontinuations of the upward propagation of wave energy from the wave sources. However, later the standard deviation of residual and secondary wave perturbations experiences a slower quasi-exponential decrease. High-resolution simulations allowed, for the first time, for the estimation of the decay times of this wave noise produced by slow residual, quasi-standing and secondary AGW spectral components, which vary between 20 and 100 h depending on altitude and the rate of wave source activation and deactivation. The standard deviations of the wave noise are larger for the case of sharp activation and deactivation of the wave forcing compared to the steep processes. These results show that transient wave sources may create long-lived wave perturbations, which can form a background level of wave noise in the atmosphere. This should be taken into account in parameterizations of atmospheric AGW impacts.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000871573300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272984
作者单位	Saint Petersburg State University; Immanuel Kant Baltic Federal University; Russian State Hydrometeorological University
推荐引用方式 GB/T 7714	Gavrilov, Nikolai M.,Kshevetskii, Sergey P.,Koval, Andrey, V. Decay times of atmospheric acoustic-gravity waves after deactivation of wave forcing[J],2022,22(20):12.
APA	Gavrilov, Nikolai M.,Kshevetskii, Sergey P.,&Koval, Andrey, V.(2022).Decay times of atmospheric acoustic-gravity waves after deactivation of wave forcing.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),12.
MLA	Gavrilov, Nikolai M.,et al."Decay times of atmospheric acoustic-gravity waves after deactivation of wave forcing".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):12.