TIAN Maoju,LI Qilin,KUANG Lan,et al.Quality Evaluation of Precipitation Fusion Products based on Chongqing “6·22” Torrential Rain[J].Journal of Chengdu University of Information Technology,2022,37(04):478-484.[doi:10.16836/j.cnki.jcuit.2022.04.018]
基于重庆“6·22”特大暴雨的降水融合产品质量评估
- Title:
- Quality Evaluation of Precipitation Fusion Products based on Chongqing “6·22” Torrential Rain
- 文章编号:
- 2096-1618(2022)04-0478-07
- Keywords:
- meteorology; data quality assessment; multi source fusion live products; precipitation fusion
- 分类号:
- P456
- 文献标志码:
- A
- 摘要:
- 为对比分析CMPAS(CMA multi-source merged precipitation analysis system)中国区域融合降水分析系统的二源和三源降水融合产品对特大暴雨降水过程的监测能力，以2020年6月19-22日重庆特大暴雨过程为例，利用重庆1977个自动气象站逐小时降水数据进行空间对比和统计评估。结果表明:(1)降水等级偏小时，两种降水融合产品数值以偏小为主，随着降水等级增大，估算误差也增大，两种产品数值以偏大为主，出现单站极端降水时，估算误差达到最大，两种产品数值均偏小，但三源产品值更接近站点观测值。(2)对于10 mm/h以下的降水区域，3种降水资料的空间分布结构完全一致; 对于10 mm/h以上的降水区域，二源和三源产品的空间分布结构、量级与站点观测值分布基本吻合。出现极端降水的区域，二源和三源产品值较站点观测值偏小，在空间结构和量级的细节处理上，三源降水产品更接近实况。
- Abstract:
- In order to compare and analyze the monitoring capability of CMPAS China regional integrated precipitation analysis system’s two source and three source precipitation fusion products for the torrential rain process, taking the torrential rain process in Chongqing on June 19-22, 2020 as an example, the hourly precipitation data of 1977 automatic weather stations in Chongqing were used for Spatial Comparison and statistical evaluation. The results show that:(1)when the precipitation level is small, the values of the two precipitation fusion products are mainly small. With the increase of the precipitation level, the estimation error also increases, and the values of the two products are mainly large. When the extreme precipitation occurs at a single station, the estimation error reaches the maximum, and the values of the two products are small, but the three source products are closer to the station observation values.(2)For the precipitation area below 10 mm/h, the spatial distribution structure of the three precipitation data is completely consistent; For the precipitation area above 10 mm/h, the spatial distribution structure and magnitude of the two source and three source products are basically consistent with the distribution of station observations. In the area of extreme precipitation, the two source and three source products are smaller than the observation value of the station, and the three source precipitation products are closer to the actual situation in the details of spatial structure and magnitude.
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备注/Memo
收稿日期:2021-06-01
基金项目:重庆市气象部门业务技术攻关基金资助项目(YWJSGG-202110、YWJSGG-202128、YWJSGG-202012)