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详细行为的最重要参数。然而，一种连续监测湿度分布的遥感技术尚未完全投入实际使用。本研究在大气雷达湿度估算技术的基础上，发展了一种新的水汽廓线遥感技术。另一种遥感方法，即拉曼激光雷达和GPS，是为了结合这些数据进行更精确的估计而开发的。具体研究内容如下：1.研究内容。利用大气雷达的湍流回波强度与垂直湿度梯度之间的相关性，发展了一种估算湿度廓线的雷达遥感技术。在该方法中，我们还将GPS可降水量数据纳入到反演算法中，以实现稳定估计。利用MU雷达-RASS的湿度廓线成功地阐明了详细的湿度S…更多的雨云结构，这是其他常规技术所没有观察到的。Shiraraki天文台的激光雷达系统经过改进，可以探测旋转拉曼信号，从而能够监测温度和湿度分布。新系统还插入了一个窄带滤光片，使我们可以在白天进行观测。利用MU雷达发展的湿度估计方法被应用于L波段的风廓线雷达，以监测大气边界层的详细湿度廓线。通过将其与MU雷达-RASS测量相结合，我们成功地估计了0.2-7.5公里范围内的湿度分布。众所周知，下视GPS无线电掩星技术可以提供高垂直分辨率的大气温度和湿度分布。为了使这项技术切实可行，我们在富士山山顶进行了测量实验。我们成功地从DL测量数据中反演了与富士山附近的探空仪观测结果一致的温度和湿度廓线。较少

项目成果

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。

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。

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。

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。

Toshitaka Tsuda, Klemens Hocke: "Application of GPS radio occultation data for studies of atmospheric waves in the middle atmosphere and ionosphere"Journal of the Meteorological Society of Japan. 82(1B). 419-426 (2004)

Toshitaka Tsuda、Klemens Hocke：“GPS 无线电掩星数据在中层大气和电离层大气波研究中的应用”日本气象学会杂志。