Studies of Waves in the Lower Atmosphere
低层大气波的研究
基本信息
- 批准号:8804623
- 负责人:
- 金额:$ 14.4万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1988
- 资助国家:美国
- 起止时间:1988-08-01 至 1991-01-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The atmospheric boundary layer over flat terrain has been extensively studied, and many of the results can be applied in a local sense to less idealized conditions. But undulating terrain introduces unique effects which generate internal waves in the overlaying fluid, which will be reabsorbed at levels where the wind reverses. Thus, the wind experiences wave-induced drag, turbulence, and horizontal eddying. Current middle-atmosphere studies address such problems, and it should prove advantageous to both fields to address the boundary layer in a similar fashion. This research also investigates a new type of atmospheric wave mode which requires a "lid" to prevent the wave energy from leaking off into the upper atmosphere. The lid for this new mode occurs at the height where its intrinsic frequency matches the local inertial frequency. One consequence of this is that the duct properties change with latitude; in the tropical troposphere wave momentum can be funneled towards a destructive terminator in the subtropics. Such wave-associated transports influence the distribution of zonal angular momentum.
平坦地形上的大气边界层已经得到了广泛的研究,许多结果可以在局部意义上应用于不太理想的条件。但起伏的地形引入了独特的效果,在覆盖的流体中产生内波,这些内波将在风向逆转的水平上被重新吸收。因此,风经历了波浪引起的阻力、湍流和水平涡旋。目前的中层大气研究解决了这样的问题,事实证明,以类似的方式处理边界层对这两个领域都是有利的。这项研究还研究了一种新型的大气波模,它需要一个盖子来防止波能泄漏到高层大气中。这种新模式的盖子出现在其固有频率与局部惯性频率匹配的高度。这样做的一个结果是,风道的性质随着纬度的变化而变化;在热带对流层,波动量可以被输送到亚热带地区的破坏性终结点。这种与波相关的输运会影响纬向角动量的分布。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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George Chimonas其他文献
Forest Canopy Waves: The Long-Wavelength Component
- DOI:
10.1023/a:1019246513260 - 发表时间:
2001-08-01 - 期刊:
- 影响因子:2.200
- 作者:
Manuel Pulido;George Chimonas - 通讯作者:
George Chimonas
The Nighttime Accelerations of the Wind in the Boundary Layer
- DOI:
10.1007/s10546-005-0609-x - 发表时间:
2005-09-01 - 期刊:
- 影响因子:2.200
- 作者:
George Chimonas - 通讯作者:
George Chimonas
Long-wavelength Cloud Rolls Over the Arctic Ice
- DOI:
10.1023/a:1002494229431 - 发表时间:
2000-01-01 - 期刊:
- 影响因子:2.200
- 作者:
George Chimonas - 通讯作者:
George Chimonas
Apparent counter-gradient heat fluxes generated by atmospheric waves
- DOI:
10.1007/bf00120030 - 发表时间:
1985-01-01 - 期刊:
- 影响因子:2.200
- 作者:
George Chimonas - 通讯作者:
George Chimonas
George Chimonas的其他文献
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{{ truncateString('George Chimonas', 18)}}的其他基金
Studies of Waves in the Lower Atmosphere
低层大气波的研究
- 批准号:
9010069 - 财政年份:1991
- 资助金额:
$ 14.4万 - 项目类别:
Continuing Grant
Theoretical Studies of Waves in the Atmospheric Boundary Layer
大气边界层波的理论研究
- 批准号:
8519883 - 财政年份:1986
- 资助金额:
$ 14.4万 - 项目类别:
Continuing Grant
A Study of Algebraic Disturbances in the Stratified Atmosphere
分层大气中的代数扰动研究
- 批准号:
8217152 - 财政年份:1983
- 资助金额:
$ 14.4万 - 项目类别:
Continuing Grant
Instabilities of Plane Parallel Flow with a Tilted Shear
倾斜剪切平面平行流的不稳定性
- 批准号:
8317367 - 财政年份:1983
- 资助金额:
$ 14.4万 - 项目类别:
Standard Grant
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