气候变化领域集成服务门户(CCPortal): AIRS Satellite Observations of Gravity Waves During the 2009 Sudden Stratospheric Warming Event

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DOI	10.1029/2020JD034073
	AIRS Satellite Observations of Gravity Waves During the 2009 Sudden Stratospheric Warming Event
	Kalisch S.; Chun H.-Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	A major sudden stratospheric warming event occurred on January 24, 2009 and showed a unique and pronounced planetary wave 2 amplitude with a subsequent split in the polar vortex. While research about the role of planetary waves during sudden stratospheric warming events exists, the contribution of gravity waves (GWs) is still uncertain. We therefore investigated the role of stratospheric GWs in the Northern Hemisphere during the 2009 winter season. We use observational data from NASA's Atmospheric Infrared Sounder (AIRS) satellite instrument for our analysis. Variances in the 4.3 µm brightness temperature perturbations are analyzed together with Level 3 temperature retrievals to investigate the connection between GWs and the warming event. Our planetary wave analysis shows zonal wavenumber 1 amplitudes during December 2008 and early January 2009. However, zonal wavenumber 2 is more dominant between mid-January and January 24, 2009. We also found a decrease in Northern hemisphere GW activity a few days before the maximum warming and the wind reversal occur at 30 hPa altitude. Furthermore, prominent GW activity was found at Labrador Peninsula and southern Greenland, both are locations of elevated GW activity (hotspots), until mid-January 2009. We discuss the potential of these orographic GWs to amplify planetary waves during the onset of the sudden stratospheric warming (SSW) event. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	gravity waves; remote sensing; sudden stratospheric warming
语种	英语
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/185494
作者单位	Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea
推荐引用方式 GB/T 7714	Kalisch S.,Chun H.-Y.. AIRS Satellite Observations of Gravity Waves During the 2009 Sudden Stratospheric Warming Event[J],2021,126(4).
APA	Kalisch S.,&Chun H.-Y..(2021).AIRS Satellite Observations of Gravity Waves During the 2009 Sudden Stratospheric Warming Event.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Kalisch S.,et al."AIRS Satellite Observations of Gravity Waves During the 2009 Sudden Stratospheric Warming Event".Journal of Geophysical Research: Atmospheres 126.4(2021).