Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Scientiarum Naturalium Universitatis Pekinensis》 2007-01
Add to Favorite Get Latest Update

Experiments on the IVAP Single-Doppler Radar Wind Retrieval Method

MEI Jue 1),2) LIANG Xudong 3) L Huanyu 4) ( 1) Department of Atmospheric Science, School of Physics, Peking University, Beijing, 100871; 2) Meteorological Center of Air Traffic Management Bureau of East China, Shanghai, 200335; 3) Shanghai Typhoon Institute, Shanghai, 200030; 4) Dalian Air Traffic Management Center, Dalian, 116033)  
The single-Doppler radar wind retrieval method is useful to enhance the applications of the Doppler radar in the observing and forecasting of mesoscale weather system. This paper shows that the VAD and VAP methods can be derived from the same relationship based on the azimuthal uniform wind assumption. By using this assumption, an IVAP (Integrating VAP) method is developed, which can overcome the sensitivity of VAP method to the short wave and too smooth property of VAD method in Doppler velocity. By using the IVAP technique, the wind fields associated with a heavy rainfall case in Shanghai (Aug. 5 th , 2001) are retrieved using a Doppler radar located at the Hongqiao Airport. Retrieved winds using azimuthal sector length of 9°,18°,45°, and 90° indicate that using shorter sector length can exhibit the cyclonic stream and mesoscale convergence line related to the heavy rainfall. The quality of the retrieved winds is validated by using surface observations and wind-profiler data. Comparison of the radar retrieved winds with surface observed winds indicates that retrieved winds have good correlation with surface observations. The larger the sector length the higher is the correlation coefficient. Twenty wind-profiler data at the same height and time also have good correlation with Doppler radar retrieved winds. The square mean errors of u or v are about 2?m·s -1 . All of the results indicate that the IVAP method is more objective to be used in applications of Doppler radar.
【Fund】: 国家自然科学基金(40405012)资助项目
【CateGory Index】: P445
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved