气候变化领域集成服务门户(CCPortal): On the Westward Quasi-8-Day Planetary Waves in the Middle Atmosphere During Arctic Sudden Stratospheric Warmings

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DOI	10.1029/2021JD035071
	On the Westward Quasi-8-Day Planetary Waves in the Middle Atmosphere During Arctic Sudden Stratospheric Warmings
	Qin Y.; Gu S.-Y.; Dou X.; Teng C.-K.-M.; Li H.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	Using the geopotential height measurements from the Aura Microwave Limb Sounder and the Sounding of the Atmosphere using Broadband Emission Radiometry instrument on the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics satellite, we found eight westward quasi-8-day wave (Q8DW) events with zonal wavenumber 1 (W1) during the Arctic sudden stratospheric warmings (SSWs) in 2005–2020. The W1 Q8DW perturbations are mainly confined to the middle and high latitudes in the Northern Hemisphere, and peak at ∼50–80 km. Specified Dynamics Whole Atmosphere Community Climate Model eXtended version simulations are utilized to reproduce the Q8DW activities. The diagnostic results indicate that the W1 Q8DWs originate from the high latitudes in the Northern Hemisphere stratosphere. Their excitation, propagation, and amplification are primarily influenced by the critical layers and baroclinic/barotropic instability, which are dependent on the background conditions during SSWs. Our statistical results show that the W1 planetary waves with periods shorter than 12 days during the Arctic SSWs are most frequently observed at the period of ∼8 days, which is significantly different from the climatological periods of the Rossby (1, 1) and (1, 2) normal modes (6.14 and 9.81 days, respectively). These results indicate that the W1 Q8DW may be a new wave mode. Finally, we found that the reversal (or deceleration) and the recovery of the zonal mean flow during SSWs can result in a zonally symmetric Q8DW, and the W1 Q8DW is likely the child wave generated by the nonlinear interaction between the stationary planetary wave with zonal wavenumber 1 and zonally symmetric Q8DW. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Aura/MLS; middle atmosphere; nonlinear interaction; quasi-8-day wave; SD-WACCM-X; sudden stratospheric warming
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236970
作者单位	Electronic Information School, Wuhan University, Wuhan, China; College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, China
推荐引用方式 GB/T 7714	Qin Y.,Gu S.-Y.,Dou X.,et al. On the Westward Quasi-8-Day Planetary Waves in the Middle Atmosphere During Arctic Sudden Stratospheric Warmings[J],2021,126(19).
APA	Qin Y.,Gu S.-Y.,Dou X.,Teng C.-K.-M.,&Li H..(2021).On the Westward Quasi-8-Day Planetary Waves in the Middle Atmosphere During Arctic Sudden Stratospheric Warmings.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Qin Y.,et al."On the Westward Quasi-8-Day Planetary Waves in the Middle Atmosphere During Arctic Sudden Stratospheric Warmings".Journal of Geophysical Research: Atmospheres 126.19(2021).