Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.12.001 |
Characterization of the Sahelian-Sudan rainfall based on observations and regional climate models | |
Salih, Abubakr A. M.1,4; Elagib, Nadir Ahmed2; Tjernstrom, Michael1,4; Zhang, Qiong3,4 | |
2018-04-01 | |
发表期刊 | ATMOSPHERIC RESEARCH
![]() |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 202页码:205-218 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Germany |
英文摘要 | The African Sahel region is known to be highly vulnerable to climate variability and change. We analyze rainfall in the Sahelian Sudan in terms of distribution of rain-days and amounts, and examine whether regional climate models can capture these rainfall features. Three regional models namely, Regional Model (REMO), Rossby Center Atmospheric Model (RCA) and Regional Climate Model (RegCM4), are evaluated against gridded observations (Climate Research Unit, Tropical Rainfall Measuring Mission, and ERA-interim reanalysis) and rain gauge data from six arid and semi-arid weather stations across Sahelian Sudan over the period 1989 to 2008. Most of the observed rain-days are characterized by weak (0.1-1.0 mm/day) to moderate ( > 1.0-10.0 mm/day) rainfall, with average frequencies of 18.5% and 48.0% of the total annual rain-days, respectively. Although very strong rainfall events ( > 30.0 mm/day) occur rarely, they account for a large fraction of the total annual rainfall (28-42% across the stations). The performance of the models varies both spatially and temporally. RegCM4 most closely reproduces the observed annual rainfall cycle, especially for the more arid locations, but all of the three models fail to capture the strong rainfall events and hence underestimate its contribution to the total annual number of rain days and rainfall amount. However, excessive moderate rainfall compensates this underestimation in the models in an annual average sense. The present study uncovers some of the models' limitations in skillfully reproducing the observed climate over dry regions, will aid model users in recognizing the uncertainties in the model output and will help climate and hydrological modeling communities in improving models. |
英文关键词 | Regional modeling Climate model evaluation Precipitation Sahel Rain-day analysis |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426226500021 |
WOS关键词 | ERA-INTERIM REANALYSIS ; LARGE-SCALE MODELS ; INTERANNUAL VARIABILITY ; CHANGING RAINFALL ; PRECIPITATION CLIMATOLOGY ; WESTERN SUDAN ; AFRICAN SAHEL ; DROUGHT ; SIMULATION ; ETHIOPIA |
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/38185 |
专题 | 地球科学 |
作者单位 | 1.Stockholm Univ, Dept Meteorol, Stockholm, Sweden; 2.Tech Hsch Koln, Inst Technol & Resources Management Trop & Subtro, D-50679 Cologne, Germany; 3.Stockholm Univ, Dept Phys Geog, Stockholm, Sweden; 4.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden |
推荐引用方式 GB/T 7714 | Salih, Abubakr A. M.,Elagib, Nadir Ahmed,Tjernstrom, Michael,et al. Characterization of the Sahelian-Sudan rainfall based on observations and regional climate models[J]. ATMOSPHERIC RESEARCH,2018,202:205-218. |
APA | Salih, Abubakr A. M.,Elagib, Nadir Ahmed,Tjernstrom, Michael,&Zhang, Qiong.(2018).Characterization of the Sahelian-Sudan rainfall based on observations and regional climate models.ATMOSPHERIC RESEARCH,202,205-218. |
MLA | Salih, Abubakr A. M.,et al."Characterization of the Sahelian-Sudan rainfall based on observations and regional climate models".ATMOSPHERIC RESEARCH 202(2018):205-218. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论