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DOI	10.5194/acp-20-11469-2020
	Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders
	Krisch I.; Ern M.; Hoffmann L.; Preusse P.; Strube C.; Ungermann J.; Woiwode W.; Riese M.
发表日期	2020
ISSN	16807316
起始页码	11469
结束页码	11490
卷号	20 期号:19
英文摘要	Many gravity wave analyses, based on either observations or model simulations, assume the presence of only a single dominant wave. This paper shows that there are much more complex cases with gravity waves from multiple sources crossing each others paths. A complex gravity wave structure consisting of a superposition of multiple wave packets was observed above southern Scandinavia on 28 January 2016 with the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA). The tomographic measurement capability of GLORIA enabled a detailed 3-D reconstruction of the gravity wave field and the identification of multiple wave packets with different horizontal and vertical scales. The larger-scale gravity waves with horizontal wavelengths of around 400 km could be characterised using a 3-D wave-decomposition method. The smaller-scale wave components with horizontal wavelengths below 200 km were discussed by visual inspection. For the larger-scale gravity wave components, a combination of gravity-wave ray-Tracing calculations and ERA5 reanalysis fields identified orography as well as a jet-exit region and a low-pressure system as possible sources. All gravity waves are found to propagate upward into the middle stratosphere, but only the orographic waves stay directly above their source. The comparison with ERA5 also shows that ray tracing provides reasonable results even for such complex cases with multiple overlapping wave packets. Despite their coarser vertical resolution compared to GLORIA measurements, co-located AIRS measurements in the middle stratosphere are in good agreement with the ray tracing and ERA5 results, proving once more the validity of simple ray-Tracing models. Thus, this paper demonstrates that the high-resolution GLORIA observations in combination with simple ray-Tracing calculations can provide an important source of information for enhancing our understanding of gravity wave propagation. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	atmospheric structure; decomposition analysis; gravity wave; infrared imagery; orographic effect; stratosphere; tomography; wave field; wave propagation; Scandinavia
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/143910
作者单位	Institute of Energy and Climate Research-Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany; Jülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, Germany; Jülich Aachen Research Alliance (JARA), Jülich, Germany; Institute of Meteorology and Climate Research-Atmospheric Trace Gases and Remote Sensing (IMK-ASF), Karlsruhe Institute of Technology, Karlsruhe, Germany
推荐引用方式 GB/T 7714	Krisch I.,Ern M.,Hoffmann L.,et al. Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders[J],2020,20(19).
APA	Krisch I..,Ern M..,Hoffmann L..,Preusse P..,Strube C..,...&Riese M..(2020).Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders.Atmospheric Chemistry and Physics,20(19).
MLA	Krisch I.,et al."Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders".Atmospheric Chemistry and Physics 20.19(2020).