气候变化领域集成服务门户(CCPortal): Kelvin-Helmholtz Billow Interactions and Instabilities in the Mesosphere Over the Andes Lidar Observatory: 2. Modeling and Interpretation

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DOI	10.1029/2020JD033412
	Kelvin-Helmholtz Billow Interactions and Instabilities in the Mesosphere Over the Andes Lidar Observatory: 2. Modeling and Interpretation
	Fritts D.C.; Wieland S.A.; Lund T.S.; Thorpe S.A.; Hecht J.H.
发表日期	2021
ISSN	2169897X
卷号	126 期号:1
英文摘要	A companion paper by Hecht et al. (2020, https://doi.org/10.1002/2014JD021833) describes high-resolution observations in the hydroxyl (OH) airglow layer of interactions among adjacent Kelvin-Helmholtz instabilities (KHI). The interactions in this case were apparently induced by gravity waves propagating nearly orthogonally to the KHI orientations, became strong as Kelvin-Helmholtz (KH) billows achieved large amplitudes, and included features named “tubes” and “knots” in early laboratory KHI studies. A numerical modeling study approximating the KHI environment and revealing the dynamics of knots and tubes is described here. These features arise where KH billows are misaligned along their axes or where two billows must merge with one. They bear a close resemblance to the observed instability dynamics and suggest that they are likely to occur wherever KHI formation is modulated by variable wind shears, stability, or larger-scale motions. Small-scale features typical of those in turbulence develop in association with the formation of the knots and tubes earlier and more rapidly than those accompanying individual billows, supporting an earlier conjecture that tubes and knots are commonly major sources of intense turbulent dissipation accompanying KHI events in the atmosphere. ©2020 GATS.
英文关键词	Kelvin-Helmholtz instability; KHI tubes and knots; multiscale dynamics; turbulence dynamics; twist waves
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/185567
作者单位	GATS, Boulder, CO, United States; Embry-Riddle Aeronautical University, Daytona Beach, FL, United States; School of Ocean Sciences, Bangor University, Anglesey, United Kingdom; The Aerospace Corporation, El Segundo, CA, United States
推荐引用方式 GB/T 7714	Fritts D.C.,Wieland S.A.,Lund T.S.,et al. Kelvin-Helmholtz Billow Interactions and Instabilities in the Mesosphere Over the Andes Lidar Observatory: 2. Modeling and Interpretation[J],2021,126(1).
APA	Fritts D.C.,Wieland S.A.,Lund T.S.,Thorpe S.A.,&Hecht J.H..(2021).Kelvin-Helmholtz Billow Interactions and Instabilities in the Mesosphere Over the Andes Lidar Observatory: 2. Modeling and Interpretation.Journal of Geophysical Research: Atmospheres,126(1).
MLA	Fritts D.C.,et al."Kelvin-Helmholtz Billow Interactions and Instabilities in the Mesosphere Over the Andes Lidar Observatory: 2. Modeling and Interpretation".Journal of Geophysical Research: Atmospheres 126.1(2021).