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Can the Accumulated Precipitation Intensity and Structure Be Captured by CINRAD VCP21 Using Bi-Directional Optical Flow (BIO) Algorithm?

文献类型：期刊论文

作者Li, Mengdi4,5; Qi, Youcun4,5; Yang, Zhida5; Zhang, Zhe3; Li, Donghuan4,5; Xiong, Muqi5; Lu, Xiaoyong2; Li, Xun1
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2026-04-13
卷号131期号:8页码:e2026JD046321
ISSN号2169-897X
DOI10.1029/2026JD046321
产权排序1
文献子类Article
英文摘要This study evaluates the effectiveness of the Bi-directional Optical Flow (BIO) method in capturing accumulated precipitation intensity and structure by China New Generation Weather Radar (CINRAD) operated in volume coverage pattern 21 (VCP21) scan mode, aiming to improve the accuracy of radar quantitative precipitation estimation (QPE). The BIO method was analyzed across 13 precipitation events, including three types of precipitation events: convective, typhoon, and stratiform precipitation events. High-resolution X-band phased array radar QPE data and rain gauge observations were used to validate the precipitation intensity and structure obtained using the BIO method. The results of elliptical parameter analysis demonstrated that the BIO method's precipitation showed high positional accuracy, precise alignment of precipitation orientation, and spatial distribution closely consistent with original X-band phased array radar precipitation data. Statistical comparisons further highlighted that accumulated precipitation intensity of the BIO method (BIOQPE) significantly reduced errors compared to intensity from VCP21 mode, with an average decrease of 11.2% in RMSE, 14.0% in RMAE, and an average increase of 4.7% in CC across the 13 events. Particularly, BIOQPE provided superior accuracy and continuity in intensity and structure for convective and typhoon precipitation events. For stratiform precipitation, BIOQPE improved spatial continuity and demonstrated greater accuracy than original radar data. The results reveal that the BIO method is effective in describing precipitation intensity and structure within observations, and significantly improves the accuracy of accumulated precipitation, especially under limited temporal resolution conditions.
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WOS关键词WSR-88D SCANNING STRATEGIES ; REAL-TIME ALGORITHM ; WEATHER RADAR ; PHASED-ARRAY ; IMPACT ; BAND
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001738838100001
出版者AMER GEOPHYSICAL UNION
源URL[http://ir.igsnrr.ac.cn/handle/311030/221547]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者Qi, Youcun; Xiong, Muqi; Lu, Xiaoyong
作者单位1.Hainan Meteorol Observ, Haikou, Peoples R China
2.Water Conservancy & Flood Control Technol Ctr, Hangzhou, Zhejiang, Peoples R China;
3.Shenzhen Natl Climate Observ, Shenzhen, Peoples R China;
4.Univ Chinese Acad Sci, Beijing, Peoples R China;
5.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;
推荐引用方式
GB/T 7714		 Li, Mengdi,Qi, Youcun,Yang, Zhida,et al. Can the Accumulated Precipitation Intensity and Structure Be Captured by CINRAD VCP21 Using Bi-Directional Optical Flow (BIO) Algorithm?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2026,131(8):e2026JD046321.
APA Li, Mengdi.,Qi, Youcun.,Yang, Zhida.,Zhang, Zhe.,Li, Donghuan.,...&Li, Xun.(2026).Can the Accumulated Precipitation Intensity and Structure Be Captured by CINRAD VCP21 Using Bi-Directional Optical Flow (BIO) Algorithm?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,131(8),e2026JD046321.
MLA Li, Mengdi,et al."Can the Accumulated Precipitation Intensity and Structure Be Captured by CINRAD VCP21 Using Bi-Directional Optical Flow (BIO) Algorithm?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 131.8(2026):e2026JD046321.

入库方式： OAI收割

来源：地理科学与资源研究所

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