高频精细化气象格点数据实时处理系统设计与实现          下载免费PDF全文

李永生  李高洁  陈逸智  张光宇 《气象科技》2022,50(6):776-782

以高频海量气象格点数据为研究对象，针对传统实时处理系统数据处理效率不高的问题，设计并实现了高频精细化气象格点数据实时处理系统的总体架构和业务流程，在分析海量高频次气象格点数据特点的基础上，设计和实现了符合气象业务需求的分布式存储模型；利用多通道动态感知技术实现了动态多通道的文件处理和文件到达的快速感知触发；利用实时数据快速处理技术实现基于精准位置寻址的快速数据块定位算法，进而实现数据块的精准定位；利用数据按需实时截取技术实现了在空间范围内按需进行裁剪的截取算法，进而实现数据按需抽取；实际业务应用表明，系统有效地提升了半结构气象数值预报产品数据的实时处理效率。  相似文献   

FSS-based Evaluation on Monsoon Precipitation Forecasts in South China from Regional Models with Different Resolution          下载免费PDF全文

张兰  任鹏飞  徐道生  李怀宇  张宇飞 《热带气象学报(英文版)》2023,29(3):301-311

This study evaluated the forecast skill of CMA-GD 3 km and CMA-GD 1 km with hourly Rapid Update Cycle (RUC) for five monsoon precipitation events in South China from 2018 to 2020, using the fraction skill score (FSS) of the neighborhood spatial verification method. The results revealed that, among the 24-lead-hour forecasts in CMA-GD 3 km, the FSS for the 0.1 mm precipitation threshold increased linearly with the lead time from 3 to 1 hour, while there was no significant improvement in other lead times. For the 5 mm precipitation threshold, the forecast skill was highest for the latest 1-hour lead time, while the FSS showed slight variation between lead times of 24 hours and 8 hours. The FSS for 10 mm and 20 mm precipitation thresholds were similar to that of 5 mm, with the difference that the best score occurred at the 2-hour lead time. Among the 6-lead-hour forecasts in CMA-GD 1 km, the forecasts of the latest 1-hour lead time were the best choices for four precipitation thresholds. When comparing CMA-GD 3 km and CMA-GD 1 km, it was found that CMA-GD 3 km had better skill for forecasts of 0.1 mm and 5 mm precipitation at 2-hour and 1-hour lead times, while CMA-GD 1 km had better skill for all other forecasts, including the forecast of 20 mm precipitation nearly all lead hours (including 3- to 6-hour, and 1-hour lead times). The results suggest that the increased resolution of the model may be beneficial for precipitation forecasts in South China, especially for short-duration heavy precipitation over a longer lead hours. However, the limited sample size of this study calls for further evaluation using more cases to validate the results′ generality.  相似文献