Development of Combined Remote-sensing Technique of Humidity Profiles

湿度剖面组合遥感技术的发展

• 批准号: 14340140
• 负责人: TSUDA Toshitaka
• 金额: $ 9.47万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340140/
• 关键词: Atmospheric Humidity; Remote-sensing; RASS; Atmosphere Radar; GPS; Lidar; Down-looking; Raman scattering; 水蒸気計測; 大気温度観測; ウィンドプロファイラー; 光・電波・音波複合観測; GPS掩蔽観測; ウインドプロファイラー

Humidity is the most important parameters to elucidate the detailed behavior of meteorological phenomena. However, a remote-sensing sensing technique to continuously monitor humidity profiles has not been fully available for practical use. In this study a new remote-sensing technique for water vapor profiling has been developed based on the humidity estimation technique with an atmosphere radar. The other remote sensing method, i.e. Raman lidar and GPS have been developed aimed at more precise estimation combining these data accordingly. The detail of the study is summarized as follows.1. Radar remote-sensing technique to estimate humidity profiles was developed using a correlation between the turbulent echo intensity with an atmosphere radar and vertical humidity gradient. In the method we also incorporated GPS precipitable water vapor data into the retrieval algorithm for a stable estimation. The humidity profiles with the MU radar-RASS successfully elucidated the detailed humidity s … More tructure in rain-clouds which had not been observed by other conventional techniques.2. A lidar system at the Shiraraki observatory was improved to detect rotation Raman signal to enable to monitor temperature and humidity profiles. The new system also inserted a narrow-band optical filter which allows us a daytime observation.3. The humidity estimation method developed with the MU radar was applied to a wind profiler radar, operated on L-band to monitor detailed humidity profiles in an atmospheric boundary layer. By combining that with the MU radar-RASS measurement, we successfully estimated humidity profiles at a wide height range between 0.2-7.5 km.4. Downward-looking (DL) GPS radio occultation technique is known to provide the atmospheric temperature and humidity profiles with high vertical resolution. With the objective of making this DL technique practicable, we performed the measurement experiment on the top of Mt.Fuji. We succeeded in retrieving the temperature and humidity profiles, which agree with the radiosonde observations near Mt.Fuji, from the DL measurement data. Less

湿度是阐明气象现象的详细行为的最重要参数。但是，尚未完全使用遥感的灵敏度技术来连续监控湿度概况。在这项研究中，基于带有大气雷达的湿度估计技术开发了一种新的水蒸气分析的遥感技术。另一种遥感方法，即拉曼激光雷达和GP，旨在更精确的估计，以相应地结合这些数据。研究的细节总结如下1。使用湍流回波强度与大气雷达与垂直湿度梯度之间的相关性开发了雷达遥感技术来估计湿度曲线。在该方法中，我们还将GPS精密水蒸气数据纳入检索算法以进行稳定估计。与MU雷达的湿度曲线成功地阐明了详细的湿度……在雨云中更多的真相，而其他常规技术未观察到。2。改进了Shiraraki观察的LiDAR系统，以检测旋转拉曼信号以监测温度和湿度曲线。新系统还插入了一个狭窄的光学滤波器，使我们可以进行白天的观察。3。用MU雷达开发的湿度估计方法应用于在L波段上操作的风介型雷达，以监视大气边界层中的详细湿度谱。通过将其与MU雷达雷达测量结果相结合，我们成功地估计了高度范围为0.2-7.5 km.4的湿度曲线。已知向下外观（DL）GPS无线电事件技术可提供高垂直分辨率的大气温度和湿度曲线。为了使这种DL技术实用，我们在MT.Fuji的顶部进行了测量实验。我们从DL测量数据中成功地检索了温度和湿度曲线，这些温度和湿度曲线与Fuji Mt.fuji附近的辐射观察结果一致。较少的

项目成果

Furumoto, J., K.Kurimoto, T.Tsuda: "Continuous observation of humidity profiles with the MU radar--RASS combined with radiosonde and GPS observation"Atmos.Ocean.Technol. 20. 23-41 (2003)

Furumoto, J.、K.Kurimoto、T.Tsuda：“使用 MU 雷达连续观测湿度剖面 - RASS 结合无线电探空仪和 GPS 观测”Atmos.Ocean.Technol。

Behrendt, A., T.Nakamura, T.Tsuda: "Combined Temperature Lidar for Measurements in the Troposphere"Stratosphere, and Mesosphere, Appl.Optics. (accepted.).

Behrendt, A.、T.Nakamura、T.Tsuda：“用于对流层测量的组合温度激光雷达”平流层和中间层，Appl.Optics。

Tsai, H.-F., T.Tsudae, G.A.Hajj, J.Wickert, Y.Aoyama: "Equatorial Kelvin waves observed with GPS occultation measurements (CHAMP and SAC-C)"J.Meteorol.Soc.Japan. 82. 397-406 (2004)

Tsai, H.-F., T.Tsudae, G.A.Hajj, J.Wickert, Y.Aoyama：“用 GPS 掩星测量（CHAMP 和 SAC-C）观测到的赤道开尔文波”J.Meteorol.Soc.Japan。

de la Torre, A., T.Tsuda, G.A.Haji, J.Wickert: "A global distribution of the stratospheric gravity wave activity from GPS occultation profiles with SAC-C and CHAMP"J.Meteorol.Soc.Japan. 82. 407-417 (2004)

de la Torre, A.、T.Tsuda、G.A.Haji、J.Wickert：“根据 SAC-C 和 CHAMP 的 GPS 掩星剖面得出的平流层重力波活动的全球分布”J.Meteorol.Soc.Japan。

Noguchi, W., T.Yoshihara, T.Tsuda, K.Hirahara: "Time-height distribution of water vapor derived by moving cell tomography during Tsukuba GPS campaigns"J.Meteorol.Soc.Japan. 82. 561-568 (2004)

Noguchi, W., T.Yoshihara, T.Tsuda, K.Hirahara：“筑波 GPS 活动期间通过移动细胞断层扫描得出的水蒸气的时间高度分布”J.Meteorol.Soc.Japan。