Radar observations of kinetic and thermal energy profiles in the atmosphere

大气中动能和热能剖面的雷达观测

• 批准号: 06640570
• 负责人: TSUDA Toshitaka
• 金额: $ 1.34万
• 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640570/
• 关键词: Atmospheric radar; RASS (Radio Acoustic Sounding System); Sensible and Latent Heat Energy; Kinetic Energy; Radio Refractive Index; Troposphere; Middle Atmosphere; Atmospheric Gravity Waves; エネルギーフラックス; 顕熱; 潜熱; 水蒸気プロファイル; レーダー観測; MUレーダー; RASS

We studied generation mechanisms of both kinetic and thermal energy in the troposphere, and their upward transport processes in the middle atmosphere. In particular, we developed new measurement techniques with the MU radar for obtaining kinetic and thermal energy profiles.It is suggested that measurements of upward flux of both momentum and heat are very important to understand dynamical coupling of different atmospheric layrs. First, time variations of horizontal wind velocity, temperature, and mixing ratio of water vapor must be determined with a good time resolution. Then, upward flux of momentum, sensible and latent heat can be estimated from a covariance between the respective parameters and the vertical wind velocity.We employed the MU radar for determinations of three components of wind velocity, and further applied the RASS (radio acoustic sounding system) technique for observations of temperature. We are additionally developing a new radar remote-sensing technique for obtaining humidity profiles, using a relation between the radar echo intensity and refractive index gradient.We have found that upward propagating gravity waves transport kinetic energy, and eventually act to decelerate the background mean winds due to wave dissipation.

我们研究了对流层中动能和热能的产生机制，以及它们在中间大气中的向上传输过程。特别是，我们使用MU雷达开发了新的测量技术来获得动力和热能剖面。这建议对动量和热量的向上通量的测量对于理解不同大气层的动态耦合非常重要。首先，必须通过良好的时间分辨率确定水蒸气的水平风速，温度和混合比的时间变化。然后，可以从各个参数和垂直风速之间的协方差估计动量，明智和潜热的向上通量。我们采用MU雷达来确定三个风速的三个组件，并进一步应用了RASS（无线电声音响声系统）温度观察的技术。我们还开发了一种新的雷达遥感技术来获得湿度曲线，使用雷达回声强度和折射率梯度之间的关系。由于波浪耗散。

项目成果

J. Rottger: "Studies of the Polar Middle and Lower Atmosphere by an MST Radar on Svalbard" Journal of Geomagnetism and Geoelectricity. 47. 929-942 (1995)

J. Rottger：“斯瓦尔巴群岛 MST 雷达对极地中层和低层大气的研究”地磁学和地电杂志。

T. Tsuda: "Variations of the gravity wave characteristics with height, season and latitude revealed by comparative observations" Journal of Atmospheric and Terrestrial Physics. 56. 555-568 (1994)

T. Tsuda：“比较观测揭示的重力波特征随高度、季节和纬度的变化”《大气与陆地物理学杂志》。

Tsuda, T., S.Fukao, M.Yamamoto, T.Nakamura, M.D.Yamanaka, T.Adachi, H.Hashiguchi, N.Fujioka, M.Tsutsumi, S.Kato, S.W.B.Harijono, T.Sribimawati, B.P.Sitorus, R.B.Yahya, M.Karmini, F.Renggono, B.L.Parapat, W.Djojonegoro.P.Mardio, N.Adikusumah, H.T.Endi, and

津田，T.，S.Fukao，M.Yamamoto，T.Nakamura，M.D.Yamanaka，T.Adachi，H.Hashiguchi，N.Fujioka，M.Tsutsumi，S.Kato，S.W.B.Harijono，T.Sribimawati，B.P.Sitorus，

Rottger, J.and T.Tsuda: "Studies of the Polar Middle and Lower Atmosphere by an MST Radar on Svalbard" Jounal of Geomagnetism Geoelecricity. Vol.47. 929-942 (1995)

Rottger, J. 和 T.Tsuda：“斯瓦尔巴群岛 MST 雷达对极地中层和低层大气的研究”地磁地电杂志。

Tsuda, Toshitaka, Yasuhiro Murayama, Harsono Wiryosumarto, Sri Woro B.Harijono, and Susumu Kato: "Radiosonde observations of equatorial atmosphere dynamics over Indonesia, Part II : Characteristics of gravity waves" Jounal of Geophysical Research. Vol.99.

Tsuda、Toshitaka、Yasuhiro Murayama、Harsono Wiryosumarto、Sri Woro B.Harijono 和 Susumu Kato：“印度尼西亚赤道大气动力学的无线电探空仪观测，第二部分：重力波的特征”地球物理研究杂志。