Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075360 |
Nonlinear Gravity Wave Forcing as a Source of Acoustic Waves in the Mesosphere, Thermosphere, and Ionosphere | |
Snively, J. B. | |
2017-12-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Numerical simulations demonstrate theoretical predictions that gravity waves with short periods (similar to 4-8 min) in the mesosphere and lower thermosphere may force secondary acoustic waves, with harmonic periods (similar to 2-4 minutes), that can reach detectable amplitudes in the thermosphere and ionosphere. The mechanism is through their vertical fluxes of vertical momentum, which lead to forcing as they are disrupted by varying stratification or instability. This is shown likely to occur where horizontally or radially opposing gravity waves interact at large amplitudes, such as above large convective sources, and after overturning. Evanescence and reflection of the waves can lead to further enhancements of the vertical fluxes and the potential for forcing. Results thus identify one of likely several mechanisms for the nonlinear conversion from gravity waves to acoustic waves, to elucidate an unappreciated source of vertical coupling. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102400039 |
WOS关键词 | THUNDERSTORMS ; OSCILLATIONS ; PROPAGATION ; EXCITATION ; ATMOSPHERE ; SIGNATURES ; EXTENSION ; SPRITES ; MODES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/29134 |
专题 | 气候变化 |
作者单位 | Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL 32114 USA |
推荐引用方式 GB/T 7714 | Snively, J. B.. Nonlinear Gravity Wave Forcing as a Source of Acoustic Waves in the Mesosphere, Thermosphere, and Ionosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(23). |
APA | Snively, J. B..(2017).Nonlinear Gravity Wave Forcing as a Source of Acoustic Waves in the Mesosphere, Thermosphere, and Ionosphere.GEOPHYSICAL RESEARCH LETTERS,44(23). |
MLA | Snively, J. B.."Nonlinear Gravity Wave Forcing as a Source of Acoustic Waves in the Mesosphere, Thermosphere, and Ionosphere".GEOPHYSICAL RESEARCH LETTERS 44.23(2017). |
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