气候变化领域集成服务门户(CCPortal): Mesospheric Mountain Wave Activity in the Lee of the Southern Andes

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DOI	10.1029/2020JD033268
	Mesospheric Mountain Wave Activity in the Lee of the Southern Andes
	Pautet P.-D.; Taylor M.J.; Fritts D.C.; Janches D.; Kaifler N.; Dörnbrack A.; Hormaechea J.L.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Gravity waves (GWs) generated by orographic forcing, also known as mountain waves (MWs) have been studied for decades. First measured in the troposphere, then in the stratosphere, they were only imaged at mesospheric altitude in 2008. Their characteristics have been investigated during several recent observation campaigns, but many questions remain concerning their impacts on the upper atmosphere, and the effects of the background environment on their deep propagation. An Advanced Mesospheric Temperature Mapper (AMTM) and the Southern Argentina Agile MEteor Radar (SAAMER) have been operated simultaneously during the Austral winter 2018 from Rio Grande, Argentina (53.8°S). This site is located near the tip of South America, in the lee of the Andes Mountains, a region considered the largest MW hotspot on Earth (e.g., Eckermann & Preusse, 1999; Hendricks et al., 2014; Jiang et al., 2003, 2005, 2002; Wright et al., 2016). New AMTM image data obtained during a 6-month period show almost 100 occurrences of MW signatures penetrating into the upper mesosphere. They are visible ∼30% of time during the period corresponding to the middle of the winter season (mid-May to mid-July). Their intermittency is highly correlated with the zonal wind controlled by the semi-diurnal tide, revealing the direct effect of the atmospheric background on MW penetration into the mesosphere lower thermosphere (MLT, altitude 80–100 km). Measurements of their momentum fluxes (MFs) were determined to reach very large values (average for 36 events ∼250 m2/s2), providing strong evidence of the importance and impacts of small-scale gravity waves at mesospheric altitudes. © 2021. American Geophysical Union. All Rights Reserved.
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/185334
作者单位	Center for Atmospheric and Space Sciences/Physics Department, State University, Logan, UT, United States; GATS, Boulder, CO, United States; NASA GSFC, Washington, DC, United States; Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhaufen, Germany; Universidad Nacional de Tierra del Fuego, Rio Grande, Argentina
推荐引用方式 GB/T 7714	Pautet P.-D.,Taylor M.J.,Fritts D.C.,et al. Mesospheric Mountain Wave Activity in the Lee of the Southern Andes[J],2021,126(7).
APA	Pautet P.-D..,Taylor M.J..,Fritts D.C..,Janches D..,Kaifler N..,...&Hormaechea J.L..(2021).Mesospheric Mountain Wave Activity in the Lee of the Southern Andes.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Pautet P.-D.,et al."Mesospheric Mountain Wave Activity in the Lee of the Southern Andes".Journal of Geophysical Research: Atmospheres 126.7(2021).