Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4522-7 |
West African Monsoon: current state and future projections in a high-resolution AGCM | |
Raj, Jerry; Bangalath, Hamza Kunhu; Stenchikov, Georgiy | |
2019-06-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52期号:11页码:6441-6461 |
文章类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia |
英文摘要 | The West African Monsoon (WAM) involves the interaction of multi-scale processes ranging from planetary to cumulus scales, which makes it challenging for coarse resolution General Circulation Models to accurately simulate WAM. The present study evaluates the ability of the high-resolution (approximate to 25 km) Atmospheric General Circulation Model HiRAM to simulate the WAM and to analyze its future projections by the end of the 21st century. For the historical period, two AMIP-type simulations were conducted, one forced with observed SST from Hadley Center Sea Ice and Sea Surface Temperature dataset and the other forced with SST from the coarse resolution Earth System Model (ESM2M), which is the parent model of HiRAM, i.e. both models have the same dynamical core and similar physical parameterizations. The future projection, using the Representative Concentration Pathway 8.5 and SST from ESM2M is also conducted. A process-based evaluation is carried out to elucidate HiRAM's ability to represent the key processes and multiscale dynamic features those define the WAM circulation. Compared to ESM2M, HiRAM better represents most of the key circulation elements at different scales, and thus more accurately represents the intensity and spatial distribution of the WAM rainfall. The position of the African easterly jet is considerably improved in HiRAM simulations, leading to the improved positioning of the WAM rainbelt and the two-cell structure of convection. The future projection of the WAM exhibits warming over the entire domain, decreasing precipitation over the southern Sahel, and increase of precipitation over the western Sahara. |
英文关键词 | West African Monsoon High-resolution AGCM GFDL HiRAM |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469016700008 |
WOS关键词 | SHALLOW MERIDIONAL CIRCULATIONS ; PART I ; INTERANNUAL VARIABILITY ; ATMOSPHERIC CIRCULATION ; RAINFALL VARIABILITY ; EQUATORIAL ATLANTIC ; EASTERLY JET ; SIMULATIONS ; MODEL ; SYSTEM |
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/183463 |
专题 | 气候变化 |
作者单位 | KAUST, Phys Sci & Engn Div PSE, Thuwal 239556900, Saudi Arabia |
推荐引用方式 GB/T 7714 | Raj, Jerry,Bangalath, Hamza Kunhu,Stenchikov, Georgiy. West African Monsoon: current state and future projections in a high-resolution AGCM[J]. CLIMATE DYNAMICS,2019,52(11):6441-6461. |
APA | Raj, Jerry,Bangalath, Hamza Kunhu,&Stenchikov, Georgiy.(2019).West African Monsoon: current state and future projections in a high-resolution AGCM.CLIMATE DYNAMICS,52(11),6441-6461. |
MLA | Raj, Jerry,et al."West African Monsoon: current state and future projections in a high-resolution AGCM".CLIMATE DYNAMICS 52.11(2019):6441-6461. |
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