In order to play the guiding role of the one-hour precipitation product of dual polarization weather radar for the next time precipitation forecast.In this paper,the one-hour precipitation products of 2 091 hourly times of 94 weather processes in Shandong Province in 2020 and one-hour precipitation of automatic meteorological station are matched and analyzed.Taking the precipitation of automatic meteorological station as the true value,it is found that the one-hour precipitation products have obvious errors.The estimation accuracy of one-hour precipitation products is low for light rain at a long distance,and poor for local strong convective precipitation at a short distance,and there is an an obvious phenomenon of empty reporting.The main factors causing errors are as follows:uncertainty of precipitation area caused by the high altitude wind speed and direction,unlocalized the precipitation estimation algorithm,the similarity between clear air echoes and weak precipitation echoes.Therefore,the accuracy of precipitation estimation products needs to be further improved.
关键词
双偏振雷达/一小时降水产品/误差/高空风/晴空回波/评估
Key words
dual polarization radar/one hour precipitation product/error/high altitude wind/clear air echoes/evaluation
维普
万方数据