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DOI | 10.1007/s00382-018-4074-x |
Impact of model resolution on simulating the water vapor transport through the central Himalayas: implication for models' wet bias over the Tibetan Plateau | |
Lin, Changgui1; Chen, Deliang1; Yang, Kun2,3,4; Ou, Tinghai1 | |
2018-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:3195-3207 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Peoples R China |
英文摘要 | Current climate models commonly overestimate precipitation over the Tibetan Plateau (TP), which limits our understanding of past and future water balance in the region. Identifying sources of such models' wet bias is therefore crucial. The Himalayas is considered a major pathway of water vapor transport (WVT) towards the TP. Their steep terrain, together with associated small-scale processes, cannot be resolved by coarse-resolution models, which may result in excessive WVT towards the TP. This paper, therefore, investigated the resolution dependency of simulated WVT through the central Himalayas and its further impact on precipitation bias over the TP. According to a summer monsoon season of simulations conducted using the weather research forecasting (WRF) model with resolutions of 30, 10, and 2 km, the study found that finer resolutions (especially 2 km) diminish the positive precipitation bias over the TP. The higher-resolution simulations produce more precipitation over the southern Himalayan slopes and weaker WVT towards the TP, explaining the reduced wet bias. The decreased WVT is reflected mostly in the weakened wind speed, which is due to the fact that the high resolution can improve resolving orographic drag over a complex terrain and other processes associated with heterogeneous surface forcing. A significant difference was particularly found when the model resolution is changed from 30 to 10 km, suggesting that a resolution of approximately 10 km represents a good compromise between a more spatially detailed simulation of WVT and computational cost for a domain covering the whole TP. |
英文关键词 | Wet bias Water vapor transport Resolution dependency Tibetan Plateau Himalayas |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447366100002 |
WOS关键词 | COMPLEX TERRAIN ; WRF MODEL ; PRECIPITATION ; CLIMATE ; CONVECTION ; SENSITIVITY ; REANALYSIS ; SYSTEM ; CMIP5 ; PARAMETERIZATION |
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/35765 |
专题 | 气候变化 |
作者单位 | 1.Univ Gothenburg, Dept Earth Sci, Reg Climate Grp, Box 460, S-40530 Gothenburg, Sweden; 2.Tsinghua Univ, Key Lab Earth Syst Modeling, Minist Educ, Beijing 100875, Peoples R China; 3.Tsinghua Univ, Ctr Earth Syst Sci, Beijing 100875, Peoples R China; 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China |
推荐引用方式 GB/T 7714 | Lin, Changgui,Chen, Deliang,Yang, Kun,et al. Impact of model resolution on simulating the water vapor transport through the central Himalayas: implication for models' wet bias over the Tibetan Plateau[J]. CLIMATE DYNAMICS,2018,51:3195-3207. |
APA | Lin, Changgui,Chen, Deliang,Yang, Kun,&Ou, Tinghai.(2018).Impact of model resolution on simulating the water vapor transport through the central Himalayas: implication for models' wet bias over the Tibetan Plateau.CLIMATE DYNAMICS,51,3195-3207. |
MLA | Lin, Changgui,et al."Impact of model resolution on simulating the water vapor transport through the central Himalayas: implication for models' wet bias over the Tibetan Plateau".CLIMATE DYNAMICS 51(2018):3195-3207. |
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