气候变化领域集成服务门户(CCPortal): A new methodology for measuring traveling quasi-5-day oscillations during sudden stratospheric warming events based on satellite observations

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DOI	10.5194/acp-22-13725-2022
	A new methodology for measuring traveling quasi-5-day oscillations during sudden stratospheric warming events based on satellite observations
	Ma, Zheng; Gong, Yun; Zhang, Shaodong; Xiao, Qiao; Huang, Chunming; Huang, Kaiming
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13725
结束页码	13737
卷号	22 期号:20 页码:13
英文摘要	Enhancements of stationary planetary waves (SPWs) and traveling planetary waves (TPWs) are commonly observed in the middle atmosphere during sudden stratospheric warming (SSW) events. Based on the least squares fitting method (Wu et al., 1995), numerous studies have used satellite measurements to investigate the characteristics of TPWs during SSWs, but they have ignored the effect of the SPWs. However, a rapid and large change in the SPWs during SSWs may lead to significant disturbances in the amplitude of derived TPWs. In this study, we present a new methodology for obtaining the amplitudes and wave numbers of traveling quasi-5-day oscillations (Q5DOs) in the middle atmosphere during major SSWs. Our new fitting method is developed by inhibiting the effect of a rapid and large change in SPWs during SSWs. We demonstrate the effectiveness of the new method using both synthetic data and satellite observations. The results of the simulations indicate that the new method can suppress the aliasing from SPWs and capture the real variations in TPWs during SSWs. Based on the geopotential height data measured by the Aura satellite from 2004 to 2021, the variations in traveling Q5DOs during eight midwinter major SSWs are reevaluated using the new method. The differences in the fitted amplitudes between the least squares fitting method and the new method are usually over 100 m during the SSW onsets. Our analysis indicates that previously reported Q5DOs during SSWs might be contaminated by SPWs, leading to both overestimation and underestimation of the amplitudes of the traveling Q5DOs.
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:000871575300001
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/273513
作者单位	Wuhan University; Wuhan University; Guizhou Normal University
推荐引用方式 GB/T 7714	Ma, Zheng,Gong, Yun,Zhang, Shaodong,et al. A new methodology for measuring traveling quasi-5-day oscillations during sudden stratospheric warming events based on satellite observations[J],2022,22(20):13.
APA	Ma, Zheng,Gong, Yun,Zhang, Shaodong,Xiao, Qiao,Huang, Chunming,&Huang, Kaiming.(2022).A new methodology for measuring traveling quasi-5-day oscillations during sudden stratospheric warming events based on satellite observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),13.
MLA	Ma, Zheng,et al."A new methodology for measuring traveling quasi-5-day oscillations during sudden stratospheric warming events based on satellite observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):13.