Radar-Derived Quantitative Precipitation Estimation in Complex Terrain Area in Qinghai-Xizang Plateau

There has been little research about radar-derived quantitative precipitation estimation over the Qinghai-Xizang Plateau due to the complex terrain,severe radar beam blockage and few rain gauges until now.Radar and gauge data of thirteen storm events in Xining from 2008to 2010had been quality controlled to construct the new climatology Z-Rrelationships of different precipitation types which were adjusted based on comparison of gauge and radar rainfall.The gauge mean calibration method is developed on the bases of the precipitation classification and bright band(BB)correction.The results show that the significant underestimations of precipitation are successfully reduced by the new constructed Z-Rrelationship of different precipitation types.As to the precipitation estimation on the BB areas,BB correction should be applied before precipitation estimation using the perfect(Z=29R1.6)Z-Rrelationship.The precipitation estimation error reduces due to the high reflectivity are corrected on BB areas and applying the perfect Z-R relationship of different precipitation types.The gauge mean calibration method can further improve the accuracy of precipitation estimation on the basis of BB correction and precipitation classification in the Qinghai-Xizang Plateau.