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DOI | 10.1007/s00382-017-3567-3 |
Sensitivity of the Himalayan orography representation in simulation of winter precipitation using Regional Climate Model (RegCM) nested in a GCM | |
Tiwari, P. R. e1; Kar, S. C.2; Mohanty, U. C.3; Dey, S.1; Sinha, P.4; Shekhar, M. S.5 | |
2017-12-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA |
英文摘要 | The role of the Himalayan orography representation in a Regional Climate Model (RegCM4) nested in NCMRWF global spectral model is examined in simulating the winter circulation and associated precipitation over the Northwest India (NWI; 23A degrees-37.5A degrees N and 69A degrees-85A degrees E) region. For this purpose, nine different set of orography representations for nine distinct precipitation years (three years each for wet, normal and dry) have been considered by increasing (decreasing) 5, 10, 15, and 20% from the mean height (CNTRL) of the Himalaya in RegCM4 model. Validation with various observations revealed a good improvement in reproducing the precipitation intensity and distribution with increased model height compared to the results obtained from CNTRL and reduced orography experiments. Further it has been found that, increase in height by 10% (P10) increases seasonal precipitation about 20%, while decrease in height by 10% (M10) results around 28% reduction in seasonal precipitation as compared to CNTRL experiment over NWI region. This improvement in precipitation simulation comes due to better representation of vertical pressure velocity and moisture transport as these factors play an important role in wintertime precipitation processes over NWI region. Furthermore, a comparison of model-simulated precipitation with observed precipitation at 17 station locations has been also carried out. Overall, the results suggest that when the orographic increment of 10% (P10) is applied on RegCM4 model, it has better skill in simulating the precipitation over the NWI region and this model is a useful tool for further regional downscaling studies. |
英文关键词 | Northwest India Orography Precipitation and RegCM4 |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000415579000031 |
WOS关键词 | INDIAN-SUMMER MONSOON ; MOUNTAINOUS TERRAIN ; SOLID PRECIPITATION ; WESTERN HIMALAYAS ; PERFORMANCE ; FORECAST ; SYSTEM ; FLOW ; AIR ; 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/35332 |
专题 | 气候变化 |
作者单位 | 1.IIT Delhi, Ctr Atmospher Sci, Delhi, India; 2.NCMRWF, A-50,Sect 62, Noida, India; 3.IIT Bhubaneswar, Sch Earth Ocean & Climate Sci, Bhubaneswar, Orissa, India; 4.Purdue Univ, Indiana State Climate Off, W Lafayette, IN 47907 USA; 5.Snow & Avalanche Study Estab, Chandigarh, India |
推荐引用方式 GB/T 7714 | Tiwari, P. R. e,Kar, S. C.,Mohanty, U. C.,et al. Sensitivity of the Himalayan orography representation in simulation of winter precipitation using Regional Climate Model (RegCM) nested in a GCM[J]. CLIMATE DYNAMICS,2017,49. |
APA | Tiwari, P. R. e,Kar, S. C.,Mohanty, U. C.,Dey, S.,Sinha, P.,&Shekhar, M. S..(2017).Sensitivity of the Himalayan orography representation in simulation of winter precipitation using Regional Climate Model (RegCM) nested in a GCM.CLIMATE DYNAMICS,49. |
MLA | Tiwari, P. R. e,et al."Sensitivity of the Himalayan orography representation in simulation of winter precipitation using Regional Climate Model (RegCM) nested in a GCM".CLIMATE DYNAMICS 49(2017). |
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