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DOI | 10.5194/acp-18-6721-2018 |
Observation of Kelvin-Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway | |
Stober, Gunter1; Sommer, Svenja1,2; Schult, Carsten1; Latteck, Ralph1; Chau, Jorge L.1 | |
2018-05-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:9页码:6721-6732 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | We present observations obtained with the Middle Atmosphere Alomar Radar System (MAARSY) to investigate short-period wave-like features using polar mesospheric summer echoes (PMSEs) as a tracer for the neutral dynamics. We conducted a multibeam experiment including 67 different beam directions during a 9-day campaign in June 2013. We identified two Kelvin-Helmholtz instability (KHI) events from the signal morphology of PMSE. The MAARSY observations are complemented by collocated meteor radar wind data to determine the mesoscale gravity wave activity and the vertical structure of the wind field above the PMSE. The KHIs occurred in a strong shear flow with Richardson numbers Ri < 0.25. In addition, we observed 15 wave-like events in our MAARSY multibeam observations applying a sophisticated decomposition of the radial velocity measurements using volume velocity processing. We retrieved the horizontal wavelength, intrinsic frequency, propagation direction, and phase speed from the horizontally resolved wind variability for 15 events. These events showed horizontal wavelengths between 20 and 40 km, vertical wavelengths between 5 and 10 km, and rather high intrinsic phase speeds between 45 and 85 ms(-1) with intrinsic periods of 5-10 min. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432204900003 |
WOS关键词 | RADAR OBSERVATIONS ; HIGH-RESOLUTION ; VHF RADAR ; MESOSPHERE ; JICAMARCA ; REGION ; ECHOES ; METEOR ; ATMOSPHERE ; EVOLUTION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17328 |
专题 | 地球科学 |
作者单位 | 1.Univ Rostock, Leibniz Inst Atmospher Phys, Schlossstr 6, D-18225 Kuhlungsborn, Germany; 2.Fraunhofer Inst High Frequency Phys & Radar Tech, Fraunhoferstr 20, D-53343 Wachtberg, Germany |
推荐引用方式 GB/T 7714 | Stober, Gunter,Sommer, Svenja,Schult, Carsten,et al. Observation of Kelvin-Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(9):6721-6732. |
APA | Stober, Gunter,Sommer, Svenja,Schult, Carsten,Latteck, Ralph,&Chau, Jorge L..(2018).Observation of Kelvin-Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(9),6721-6732. |
MLA | Stober, Gunter,et al."Observation of Kelvin-Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.9(2018):6721-6732. |
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