DEEPWAVE: Spatial and Fourier Ray Modeling of Mountain Waves
DEEPWAVE:山地波浪的空间和傅里叶射线建模
基本信息
- 批准号:1338557
- 负责人:
- 金额:$ 18.32万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-02-01 至 2017-01-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project will be part of the international DEEPWAVE campaign which will seek to understand the generation and propagation of atmospheric gravity waves from orographic and other sources from ground-level up to 100 km altitude, and will use airborne and ground-based instrumentation as well as modeling. It will take place in June/July 2014 in the region over New Zealand, Tasmania and the surrounding Southern Ocean. This project will provide ray-tracing analysis and forecasts for DEEPWAVE, with an emphasis on mountain waves. Two complementary ray formulations will be used: Fourier space ray-tracing and spatial ray-tracing. The Fourier-space ray-tracing is mainly for the region directly above mountains, where wave amplitudes tend to be highest and where spatial ray-tracing often fails to satisfy slowly varying requirements. The Fourier-space ray-tracing can also be coupled to a mesoscale model simulation to improve initial conditions for the Fourier-space rays. The spatial ray-tracing is mainly for mountain-wave propagation through the Polar Night Jet, with a new treatment of the three-dimensional geometrical spreading by horizontally and vertically varying wind shear.The work will involve a new analysis of geometrical spreading, a process that is omitted from almost all ray-tracing studies of gravity waves and that is likely to be important in the DEEPWAVE region. Aspects such as the directionality and anisotropy of the geometrical spreading will be examined for the first time and may provide clues for improved gravity wave parameterizations. The DEEPWAVE project will promote international scientific collaboration. Understanding gravity wave propagation and breakdown in the middle and upper atmosphere is related to a number of strategic and societal issues, including the safety of high altitude aircraft, the accuracy of weather and climate models, and the ability to forecast certain space weather phenomena that affect satellite communication.
该项目将是国际DEEPWAVE活动的一部分,该活动将寻求了解从地面到100公里高度的地形和其他来源产生和传播的大气重力波,并将使用机载和地基仪器以及建模。它将于2014年6月/7月在新西兰,塔斯马尼亚和周围的南大洋地区举行。该项目将为DEEPWAVE提供射线追踪分析和预报,重点是山波。将使用两种互补的射线公式:傅立叶空间射线跟踪和空间射线跟踪。傅立叶空间射线追踪主要用于山脉正上方的区域,那里的波幅往往最高,空间射线追踪往往无法满足缓慢变化的要求。傅里叶空间射线追踪还可以与中尺度模型模拟相结合,以改善傅里叶空间射线的初始条件。空间射线追踪主要是研究通过极夜急流的山波传播,并对水平和垂直变化的风切变引起的三维几何传播作了新的处理。这项工作将涉及对几何传播的新分析,这一过程在几乎所有重力波的射线追踪研究中都被忽略了,但在深水区可能很重要。几何扩散的方向性和各向异性等方面将首次进行研究,并可能为改进重力波参数化提供线索。DEEPWAVE项目将促进国际科学合作。了解重力波在中层和高层大气中的传播和分解与一些战略和社会问题有关,包括高空飞行器的安全、天气和气候模型的准确性以及预测影响卫星通信的某些空间天气现象的能力。
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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Dave Broutman其他文献
A WKB derivation for internal waves generated by a horizontally moving body in a thermocline
- DOI:
10.1016/j.wavemoti.2021.102759 - 发表时间:
2021-09-01 - 期刊:
- 影响因子:
- 作者:
Dave Broutman;Laura Brandt;James W. Rottman;Cecily K. Taylor - 通讯作者:
Cecily K. Taylor
Integral expressions for mountain wave steepness
- DOI:
10.1016/j.wavemoti.2015.01.003 - 发表时间:
2015-07-01 - 期刊:
- 影响因子:
- 作者:
Harold Knight;Dave Broutman;Stephen D. Eckermann - 通讯作者:
Stephen D. Eckermann
Compressible and anelastic governing-equation solution methods for thermospheric gravity waves with realistic background parameters
- DOI:
10.1007/s00162-024-00709-x - 发表时间:
2024-07-15 - 期刊:
- 影响因子:2.800
- 作者:
Harold Knight;Dave Broutman;Stephen Eckermann - 通讯作者:
Stephen Eckermann
Dave Broutman的其他文献
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{{ truncateString('Dave Broutman', 18)}}的其他基金
Ray Methods for Atmospheric Gravity Waves
大气重力波的射线方法
- 批准号:
0448888 - 财政年份:2005
- 资助金额:
$ 18.32万 - 项目类别:
Continuing Grant
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