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DOI | 10.1029/2019JD031313 |
Practical and Intrinsic Predictability of a Warm-Sector Torrential Rainfall Event in the South China Monsoon Region | |
Wu, Naigeng1,2,3; Zhuang, Xiaoran1; Min, Jinzhong1; Meng, Zhiyong3 | |
2020-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Warm-sector torrential rainfall (WR) in the South China monsoon region has long been a forecasting challenge because of the limited capability of numerical models in heavy rainfall without strong synoptic forcing. Through convection-allowing ensemble forecasts, this study explores both the intrinsic and practical predictability of a coastal WR event on 19-20 May 2015 during SCMREX (the Southern China Monsoon Rainfall Experiment). The results show a large variability in forecast performance among different members, indicating the practical limit of predictability. In general, GOOD members tend to have a stronger low-level southerly wind over the sea (monsoon flow) and a considerable surface cooling over the northern mountains (associated with land/mountain breeze). Further investigation via ensemble-based sensitivity analysis shows that the occurrence of WR is closely related to the nighttime strengthened (cooling) southerly wind (temperatures) over the sea (mountains), 1-3 hr prior to the convection initiation. In contrast, spatial scaling of the initial perturbations has little impact on the forecast after 3 hr and the meso-gamma-scale rainfall is fully decorrelated after 12 hr, suggesting an intrinsic predictability limit for lead times as short as 6-12 hr. Sensitivity experiments are conducted with the initial-condition differences reduced by almost an order of magnitude smaller than typical ensemble perturbations, with the results demonstrating that the rainstorm might be near the point of bifurcation, where predictability is intrinsically limited. The limits of both intrinsic and practical predictability highlight the need for rapidly updated and probabilistic convection-allowing ensemble forecasts for events of this type. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000519227000004 |
WOS关键词 | ENSEMBLE-SENSITIVITY-ANALYSIS ; LOW-LEVEL JETS ; MESOSCALE PREDICTABILITY ; ATMOSPHERIC PREDICTABILITY ; INITIAL CONDITION ; CONVECTION ; PRECIPITATION ; PERTURBATIONS ; TRANSFORM ; FORECAST |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280074 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing, Peoples R China; 2.China Meteorol Adm, Inst Trop & Marine Meteorol, Key Lab Reg Numer Weather Predict, Guangzhou, Peoples R China; 3.Peking Univ, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Sch Phys, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Naigeng,Zhuang, Xiaoran,Min, Jinzhong,et al. Practical and Intrinsic Predictability of a Warm-Sector Torrential Rainfall Event in the South China Monsoon Region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(4). |
APA | Wu, Naigeng,Zhuang, Xiaoran,Min, Jinzhong,&Meng, Zhiyong.(2020).Practical and Intrinsic Predictability of a Warm-Sector Torrential Rainfall Event in the South China Monsoon Region.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(4). |
MLA | Wu, Naigeng,et al."Practical and Intrinsic Predictability of a Warm-Sector Torrential Rainfall Event in the South China Monsoon Region".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.4(2020). |
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