Deciphering summer precipitation patterns: A dual-step framework for classification in the Middle-Lower Yangtze River Basin
文献类型：期刊论文
| 作者 | Liang, Liaofeng2,3; Xia, Jun3,4; Wang, Zhonggen1,2 |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 326页码:108332 |
| 关键词 | Seasonal precipitation Patterns classification Atmospheric circulation |
| ISSN号 | 0169-8095 |
| DOI | 10.1016/j.atmosres.2025.108332 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Precipitation spatial patterns significantly impact regional water resource management, agricultural production, and socioeconomic development. While conventional methods typically explain less than 80 % of total precipitation variability due to challenges in analyzing spatially heterogeneous rainfall data, this study introduces a novel dual-criterion framework integrating Agglomerative Hierarchical Clustering (AHC) with Rotated Empirical Orthogonal Function (REOF) to enhance pattern identification. Using meteorological station data (1951-2024) from the Middle-Lower Yangtze River Basin (MLYRB), we identified 11 homogeneous sub-regions and six dominant precipitation patterns explaining a notably high 85.1 % of total variance: basin-wide coherent (34.7 %), north-south dipole (18.6 %), western dominant (11.3 %), lower reaches dominant (8.0 %), and two tripole patterns (12.4 % combined). The basin-wide pattern, occurring most frequently (31 years), dominated historical catastrophic floods (1954, 1998, 2020). Circulation analysis revealed a distinctive tripole structure in the 500 hPa geopotential height field driving the basin-wide pattern, while anticyclonic circulation anomalies characterized the north-south dipole pattern. The positive phase of the basin-wide pattern features enhanced southwesterly moisture transport from tropical sources with peak convergence of -2.29 x 10-6 kg/(m 2 & sdot;s) over the central Yangtze region, mechanistically explaining basin-wide precipitation increases. Wavelet coherence analysis uncovered a critical temporal shift in ENSO's influence on basin-wide precipitation from short (2-4 years) to long (8-12 years) periods since the 1960s, fundamentally transforming teleconnection impacts on major flood events. Concurrently, PDO maintains a robust decadal-scale relationship with lower Yangtze precipitation patterns throughout the entire study period, offering potential for reliable long-term predictability. These findings provide a scientific foundation for improving seasonal precipitation forecasting and regional water resource management under changing climate conditions. |
| URL标识 | 查看原文 |
| WOS关键词 | EXTREME PRECIPITATION ; SEASONAL PRECIPITATION ; WAVELET COHERENCE ; EAST CHINA ; RAINFALL ; OSCILLATION ; VARIABILITY ; EVENTS ; MODES |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001528141600002 |
| 出版者 | ELSEVIER SCIENCE INC |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215348]  |
| 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 | Wang, Zhonggen |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 101400, Peoples R China 2.Minist Emergency Management China, Natl Inst Nat Hazards, Beijing 100085, Peoples R China; 3.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 4.Wuhan Univ, State Key Lab Water Resources Engn & Management, Wuhan 430072, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liang, Liaofeng,Xia, Jun,Wang, Zhonggen. Deciphering summer precipitation patterns: A dual-step framework for classification in the Middle-Lower Yangtze River Basin[J]. ATMOSPHERIC RESEARCH,2025,326:108332. |
| APA | Liang, Liaofeng,Xia, Jun,&Wang, Zhonggen.(2025).Deciphering summer precipitation patterns: A dual-step framework for classification in the Middle-Lower Yangtze River Basin.ATMOSPHERIC RESEARCH,326,108332. |
| MLA | Liang, Liaofeng,et al."Deciphering summer precipitation patterns: A dual-step framework for classification in the Middle-Lower Yangtze River Basin".ATMOSPHERIC RESEARCH 326(2025):108332. |
入库方式： OAI收割
来源：地理科学与资源研究所
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