Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0297.1 |
Broad-Spectrum Mountain Waves | |
Smith, Ronald B.; Kruse, Christopher G. | |
2017-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Recent airborne mountain-wave measurements over New Zealand in the lower stratosphere during the Deep Propagating Gravity Wave Experiment (DEEPWAVE) campaign allow for improved spectral analysis of velocities u, y, and w, pressure p, and temperature T fluctuations. Striking characteristics of these data are the spectral breadth and the different spectral shapes of the different physical quantities. Using idealized complex terrain as a guide, the spectra are divided into the long-wave "volumemode'' arising fromair flowover the whole massif and the short-wave "roughness mode'' arising from flow into and out of valleys. The roughness mode is evident in the aircraft data as an intense band of w power from horizontal wavelength lambda (=) 8-40 km. The shorter part of this band (i.e., lambda = 8-15 km) falls near the nonhydrostatic buoyancy cutoff (lambda = 2 pi U/N). It penetrates easily into the lower stratosphere but carries little u power or momentum flux. The longer part of this roughness mode (i.e., lambda = 15-40 km) carries most of the wave momentum flux. The volume mode for New Zealand, in the range lambda = 200-400 km, is detected using the u-power, p-power, and T-power spectra. Typically, the volume mode carries a third or less of the total wave momentum flux, but it dominates the u power and thus may control the wave breakdown aloft. Spectra from numerical simulations agree with theory and aircraft data. Problems with the monochromatic assumption for wave observation and momentum flux parameterization are discussed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400730900003 |
WOS关键词 | GRAVITY-WAVE ; MOMENTUM FLUXES ; NEW-ZEALAND ; GENERAL-CIRCULATION ; ENERGY-DISSIPATION ; CLIMATE MODELS ; SOUTHERN ALPS ; DRAG ; TERRAIN ; STRATOSPHERE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/29753 |
专题 | 地球科学 |
作者单位 | Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06520 USA |
推荐引用方式 GB/T 7714 | Smith, Ronald B.,Kruse, Christopher G.. Broad-Spectrum Mountain Waves[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(5). |
APA | Smith, Ronald B.,&Kruse, Christopher G..(2017).Broad-Spectrum Mountain Waves.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(5). |
MLA | Smith, Ronald B.,et al."Broad-Spectrum Mountain Waves".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.5(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论