基于瓦片分区的雷达动态定量降水估测方法研究
收稿日期: 2023-12-27
修回日期: 2024-04-02
网络出版日期: 2024-04-02
基金资助
国家重点研发计划专项(2022YFC3003901)
Research on Dynamic Quantitative Precipitation Estimation Method Based on Tile Partitioning for Radar
Received date: 2023-12-27
Revised date: 2024-04-02
Online published: 2024-04-02
李佳慧 , 马建立 , 陈明轩 , 史朝 . 基于瓦片分区的雷达动态定量降水估测方法研究[J]. 高原气象, 2025 , 44(1) : 122 -133 . DOI: 10.7522/j.issn.1000-0534.2024.00052
Considering the spatiotemporal variability of raindrop spectra is an effective way to improve radar quantitative precipitation estimation (QPE).When using radar to estimate precipitation, the difference of raindrop spectrum is mainly manifested by the formulas of Z-R relation.Using the method of tile partitioning QPE (QPE_TP), the precipitation estimation area is divided into tile partitions, the Z-R relationship is dynamically fitted using radar and automatic station data to carry out QPE within each tile.The QPE_TP effect was evaluated by utilizing six weather cases.From the evaluation indexes of QPE, the capability of QPE is significantly improved compared with the traditional fixed Z-R relationship and the global dynamic Z-R relationship.The QPE results are basically consistent with the heavy precipitation center, and the bias evaluation indexes are the least.The results show that the QPE_TP method is an effective way to improve radar QPE.
Key words: precipitation estimates; Radar mosaic; partition fitting
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