globalchange  > 影响、适应和脆弱性
DOI: 10.1175/JCLI-D-17-0367.1
Scopus记录号: 2-s2.0-85052792214
论文题名:
Interdecadal changes in the leading ocean forcing of Sahelian Rainfall interannual variability: Atmospheric dynamics and role of multidecadal SST background
作者: Suárez-Moreno R.; Rodríguez-Fonseca B.; Barroso J.A.; Fink A.H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:17
起始页码: 6687
结束页码: 6710
语种: 英语
英文关键词: Interannual variability ; Monsoons ; Multidecadal variability ; Teleconnections
Scopus关键词: Atmospheric pressure ; Rain ; Rain gages ; Surface waters ; Atmospheric response ; Interannual variability ; Intertropical convergence zone ; Monsoons ; Multidecadal variability ; Rainfall variability ; Sea surface temperature (SST) ; Teleconnections ; Oceanography
英文摘要: The atmospheric response to global sea surface temperatures is the leading cause of rainfall variability in the West African Sahel. On interannual periodicities, El Niño-Southern Oscillation, the Atlantic equatorial mode, and Mediterranean warm/cold events primarily drive variations of summer rainfall over the Sahel. Nevertheless, the rainfall response to these modes of interannual SST variability has been suggested to be unstable throughout the observational record. This study explores changes in the leading patterns of covariability between Sahel rainfall and SSTs, analyzing the dynamical mechanisms at work to explain the nonstationary relationship between anomalies in these two fields. A new network of rain gauge stations across West Africa is used for the first time to investigate these instabilities during the period 1921-2010. A hypothesis is raised that the underlying SST background seems to favor some interannual teleconnections and inhibit others in terms of the cross-equatorial SST gradients and associated impacts on the location of the intertropical convergence zone. Results of this study are relevant for improving the seasonal predictability of summer rainfall in the Sahel. © 2018 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110700
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Geophysics and Meteorology, Universidad Complutense de Madrid, Spain; Instituto de Geociencias, Universidad Complutense de Madrid-CSIC, Madrid, Spain; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany

Recommended Citation:
Suárez-Moreno R.,Rodríguez-Fonseca B.,Barroso J.A.,et al. Interdecadal changes in the leading ocean forcing of Sahelian Rainfall interannual variability: Atmospheric dynamics and role of multidecadal SST background[J]. Journal of Climate,2018-01-01,31(17)
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