Collaborative observations of equatorial atmosphere dynamics

赤道大气动力学协同观测

• 批准号: 09044080
• 负责人: TSUDA Toshitaka
• 金额: $ 10.3万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09044080/
• 关键词: Equatrial Atmosphere; Middle Atmosphere; Atmospheric Radar; Global Circulation; Meteor Wind Radar; Atmospheric Waves; Indonesia; Earth Atmospheric Environment; 地球大気環境

The main purpose of this study is to reveal the characteristics of middle atmosphere dynamics over equatorial region, especially over Indonesia. We continued long-period observations around mesopause region using Meteor Wind Radar at Jakarta and MF Radar at Pontianak. We also con-ducted an intensive radiosonde sounding campaign at Pontianak to analyze behavior of atmospheric waves near the source region. The variances of wind velocity fluctuations with short periods and small vertical scales showed clear seasonal variations, and they seemed to be correlated with background conditions such as water vapor content and mean zonal wind velocity. Those data obtained in Indonesia were included in the database of equatorial atmosphere radar network, and compared with data obtained from other radars, satellite, and results of numerical models.Precise spatial structure of diurnal and semidiurnal tides in lower latitude and longitudinal dependence of Mesospheric Semi Annual Oscillation(MSAO) were clearly described. Additionally, new methods of estimation for momentum flux using radiosonde data are under development. We also constructed a direct data transfer route via Internet from Indonesia to Japan and Australia.

这项研究的主要目的是揭示赤道区域中中部大气动力学的特征，尤其是在印度尼西亚。我们使用雅加达的Meteor风雷达和Pontianak的MF雷达进行了长期观测，并在上层区域周围进行了长期观察。我们还在Pontianak进行了一场密集的辐射响应运动，以分析源区域附近大气波的行为。随着短时间和较小的垂直尺度的风速波动的差异显示出明显的季节性变化，它们似乎与背景条件（例如水蒸气含量和平均层状风速速度）相关。在印度尼西亚获得的数据包括在赤道大气雷达网络的数据库中，并与从其他雷达，卫星和数值模型的结果获得的数据进行了比较。在较低的纬度和较低纬度和纵向纵向的昼夜和半层潮汐的空间结构。清晰描述了年度振荡（MSAO）。此外，正在开发使用辐射数据数据的动量通量的新估计方法。我们还通过互联网从印度尼西亚到日本和澳大利亚构建了直接数据传输路线。

项目成果

T.Nakamura: "Short period fluctuations of the diurnal tide observed with low-latitude MF and meteor radars during CADRE : Evidence for gravity wave/Tidal interactions" Journal of Geophysical Research. 102, D22. 26,225-26,238 (1997)

T.Nakamura：“CADRE 期间用低纬度 MF 和流星雷达观测到的日潮汐的短期波动：重力波/潮汐相互作用的证据”地球物理研究杂志。

W.Deng: "Coordinated global radar observations of tidal and planetary waves in the mesosphere and lower thermosphere during 20-30 January 1993" Journal of Geophysical Research. 102. 7307-7318 (1997)

W.Deng：“1993 年 1 月 20 日至 30 日期间对中层和低层热层潮汐和行星波的协调全球雷达观测”地球物理研究杂志。

S.Kovalam: "Longitudinal variations in planetary wave activity in the equational mesopause" Earth, Planets and Space. (in print).

S.Kovalam：“等式中层顶行星波活动的纵向变化”地球、行星和太空。

T.Tsuda: "Observations of atmospheric waves in the tropical Pacific with radars and radiosondes" Advances in Space Research. 印刷中.

T.Tsuda：“利用雷达和无线电探空仪对热带太平洋大气波的观测”，空间研究进展，已出版。

S.Yoshida: "Seasonal variations of 3.0-3.8 day ultra-fast Kelvin waves observed with a meteor radar and radiosondes in Indonesia" Earth, Planets and Space. 印刷中.

S. Yoshida：“印度尼西亚流星雷达和无线电探空仪观测到的 3.0-3.8 天超快开尔文波的季节变化”，《地球、行星和太空》正在出版。