Study of frequency and vertical wavenumber spectra of wind velocity flucutations due to atmospheric gravity waves

大气重力波引起的风速脉动的频率谱和垂直波数谱研究

• 批准号: 04640425
• 负责人: TSUDA Toshitaka
• 金额: $ 1.22万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640425/
• 关键词: atmospheric gravity waves; middle atmosphere; MU radar; meteor wind radar; atmospheric turbulence; jet stream; cumulous convection; spectral analysis; 大気層の力学的結合; 周波数・波数スペクトル; 赤道域積雲対流; ロケットゾンデ; ラジオゾンデ

We have reviewed in this study recent observational studies on gravity wave characteristics, focussing on their excitation, propagation aud dissipation proccsses. Since gravity waves are normally observed as superpositioning of many components with different frequencies and wavenumbers, we employed a spectral analysis of wind velocity and temperature fluctuations, obatined with an MST radar, rocketsonde and radiosondes. It has been found that a linear saturation theory of gravity waves sucessfully explained fundamental characteristics of gravity waves, such as height variations of energy and dominant wavelengths.We also delineated latitudinal variations of gravity wave activity through comparative studies between the MU radar at Shigaraki (35ﾟN, 136ﾟE), MF radars at Adelaide (35ﾟS, 139ﾟE) and Saskatchewan (52ﾟN, 107ﾟW). Comparisons were further extended to equatorial regions, by including radiosnde measurements in East Jawa, Indonesia (7ﾟS, 113ﾟE).

我们在这项研究中回顾了最近关于重力波特征的观测研究，重点关注它们的激发、传播和耗散过程。由于重力波通常被观察为具有不同频率和波数的许多分量的叠加，因此我们采用了风速和波数的谱分析。通过 MST 雷达、火箭探空仪和无线电探空仪获得的温度波动已经发现，重力波的线性饱和理论成功地解释了重力波的基本特征，例如重力波的高度变化。我们还通过信乐 (35ﾟN, 136ﾟE) 的 MU 雷达、阿德莱德 (35ﾟS, 139ﾟE) 和萨斯喀彻温省 (52ﾟN, 107ﾟW) 进一步扩展到赤道地区。印度尼西亚东爪哇省的无线电探伤测量（南纬 7°，东经 113°）。

项目成果

T.Nakamura: "Comparative Observation of Short Period Gravity Waves (10-100min) in the Mesosphere in 1989 by Saskatoon MF Radar (52°N),Canada and the MU Radar (35°N),Japan" Radio Science. 28. 729-746 (1993)

T.Nakamura：“1989 年加拿大萨斯卡通 MF 雷达（北纬 52°）和日本 MU 雷达（北纬 35°）对中层短周期重力波（10-100 分钟）的比较观测”《无线电科学》28。 729-746 (1993)

Y.Murayama: "Seasonal variation of gravity wave activity in the lower stratosphere observed with the MU radar" Journal of Geophysical Research. (印刷中). (1994)

Y. Murayama：“用 MU 雷达观察到的平流层下部重力波活动的季节变化”地球物理研究杂志（1994 年出版）。

Tsuda, T., Y.Murayama, T.Nakamura, R.A. : Vincent, A.H.Manson, C.E.Meek: "Variations of the gravity wave characteristics with height, season and latitude revealed by comparative observations" J.Atomos.Terr.Phys.(in press). (1994)

津田，T.，Y.村山，T.中村，R.A.

T.Nakamura: "Compative Observation of Short Period Granity Waves (10-100 min) in the Mwsosphere in 1989 by Saskatoon MF Radar (52°N), Canada and the MU Radar (35ﾟN), Japan" Radio Science. 28. 729-746 (1993)

T.Nakamura：“1989 年加拿大萨斯卡通 MF 雷达（北纬 52°）和日本 MU 雷达（北纬 35°）对 Mwsosphere 短周期花岗岩波（10-100 分钟）的比较观测”无线电科学 28。 .729-746 (1993)

Murayama, Y., T.Tsuda, S.Kato, and S.Fukao: "Seasonal variation of gravity wave activity in the lower stratosphere observed with the MU radar" J.Geophys.Res.(in press). (1994)

Murayama, Y.、T.Tsuda、S.Kato 和 S.Fukao：“用 MU 雷达观测到的平流层下部重力波活动的季节性变化”J.Geophys.Res.（出版中）。