Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4445-3 |
How essential of the balance between large and small scale features to reproduce precipitation during a sudden sharp turn from drought to flood | |
Ma, Yuanyuan1,2; Yang, Yi1; Wang, Chenghai1 | |
2019-04-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:5013-5029 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Sudden turn from drought to flood (STDF) is a unique representation of intra-seasonal extreme events and occurs frequently. However, it is notoriously difficult to represent in climate simulations due to the accumulation of model errors. This study uses a regional climate model (RCM) with different initialization and nudging schemes to explore effective approaches for capturing a STDF event. Results show that the conventional continuous integration with single initialization cannot reproduce the STDF event, while nudging or re-initialization can. Furthermore, spectral nudging and re-initialization outperform the conventional continuous simulation in reproducing precipitation features, but grid nudging induces the largest biases for precipitation though it has the smallest biases for other meteorological elements. Scale separation analysis shows that the large-scale features of the conventional continuous simulation drift far from the actual fields and force erroneous small-scale features, whereas the nudging and re-initialization successfully prevent the model from drifting away from the forcing fields at large-scales. The different performance for simulating precipitation among spectral nudging, re-initialization and grid nudging can be attributed to that the former two methods generate their own small-scale information via the RCM, while grid nudging over-suppresses the small-scale information while retaining the large-scale features. The difference in small-scale features affects the simulation of different moisture fluxes and convergences, as well as clouds, and then results in diverse precipitation. These results illustrate that both the consistency with large-scale features and the local variability from small-scale features are both robust factors for reproducing precipitation features during extreme events using RCMs. |
英文关键词 | Sudden turn from drought to flood Conventional continuous simulation Grid nudging Spectral nudging Re-initialization |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467187600067 |
WOS关键词 | REGIONAL CLIMATE MODEL ; SIMULATIONS ; SENSITIVITY ; PATTERNS ; EVENTS |
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/181937 |
专题 | 气候变化 |
作者单位 | 1.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Ma, Yuanyuan,Yang, Yi,Wang, Chenghai. How essential of the balance between large and small scale features to reproduce precipitation during a sudden sharp turn from drought to flood[J]. CLIMATE DYNAMICS,2019,52:5013-5029. |
APA | Ma, Yuanyuan,Yang, Yi,&Wang, Chenghai.(2019).How essential of the balance between large and small scale features to reproduce precipitation during a sudden sharp turn from drought to flood.CLIMATE DYNAMICS,52,5013-5029. |
MLA | Ma, Yuanyuan,et al."How essential of the balance between large and small scale features to reproduce precipitation during a sudden sharp turn from drought to flood".CLIMATE DYNAMICS 52(2019):5013-5029. |
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