Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3886-4 |
Impact of dynamical regionalization on precipitation biases and teleconnections over West Africa | |
Gomara, Inigo1,2,3; Mohino, Elsa1; Losada, Teresa1; Dominguez, Marta1,2; Suarez-Moreno, Roberto1,2; Rodriguez-Fonseca, Belen1,2 | |
2018-06-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:4481-4506 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | West African societies are highly dependent on the West African Monsoon (WAM). Thus, a correct representation of the WAM in climate models is of paramount importance. In this article, the ability of 8 CMIP5 historical General Circulation Models (GCMs) and 4 CORDEX-Africa Regional Climate Models (RCMs) to characterize the WAM dynamics and variability is assessed for the period July-August-September 1979-2004. Simulations are compared with observations. Uncertainties in RCM performance and lateral boundary conditions are assessed individually. Results show that both GCMs and RCMs have trouble to simulate the northward migration of the Intertropical Convergence Zone in boreal summer. The greatest bias improvements are obtained after regionalization of the most inaccurate GCM simulations. To assess WAM variability, a Maximum Covariance Analysis is performed between Sea Surface Temperature and precipitation anomalies in observations, GCM and RCM simulations. The assessed variability patterns are: El Nio-Southern Oscillation (ENSO); the eastern Mediterranean (MED); and the Atlantic Equatorial Mode (EM). Evidence is given that regionalization of the ENSO-WAM teleconnection does not provide any added value. Unlike GCMs, RCMs are unable to precisely represent the ENSO impact on air subsidence over West Africa. Contrastingly, the simulation of the MED-WAM teleconnection is improved after regionalization. Humidity advection and convergence over the Sahel area are better simulated by RCMs. Finally, no robust conclusions can be determined for the EM-WAM teleconnection, which cannot be isolated for the 1979-2004 period. The novel results in this article will help to select the most appropriate RCM simulations to study WAM teleconnections. |
英文关键词 | Precipitation West African monsoon Tropical variability Teleconnections CMIP5 CORDEX |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432597400030 |
WOS关键词 | CLIMATE MODEL ; EQUATORIAL ATLANTIC ; INTERANNUAL VARIABILITY ; SST ANOMALIES ; RAINFALL ; TEMPERATURE ; CIRCULATION ; SCALE ; ENSO ; 20TH-CENTURY |
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/36203 |
专题 | 气候变化 |
作者单位 | 1.Univ Complutense Madrid, Fac CC Fis, Dept Geofis & Meteorol, Ciudad Univ S-N, E-28040 Madrid, Spain; 2.UCM, CSIC, Inst Geociencias IGEO, Madrid, Spain; 3.Univ Politecn Madrid, CEIGRAM, Madrid, Spain |
推荐引用方式 GB/T 7714 | Gomara, Inigo,Mohino, Elsa,Losada, Teresa,et al. Impact of dynamical regionalization on precipitation biases and teleconnections over West Africa[J]. CLIMATE DYNAMICS,2018,50:4481-4506. |
APA | Gomara, Inigo,Mohino, Elsa,Losada, Teresa,Dominguez, Marta,Suarez-Moreno, Roberto,&Rodriguez-Fonseca, Belen.(2018).Impact of dynamical regionalization on precipitation biases and teleconnections over West Africa.CLIMATE DYNAMICS,50,4481-4506. |
MLA | Gomara, Inigo,et al."Impact of dynamical regionalization on precipitation biases and teleconnections over West Africa".CLIMATE DYNAMICS 50(2018):4481-4506. |
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