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114588 |
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|a dc
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|a Nicholson, S. E.
|e author
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|a Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
|e contributor
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|a Whittleston, David
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|a Entekhabi, Dara
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|a Schlosser, A.
|e author
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|a Whittleston, David
|e author
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|a Entekhabi, Dara
|e author
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|a Climate Models Lack Jet-Rainfall Coupling over West Africa
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|b American Meteorological Society,
|c 2018-04-06T14:34:03Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/114588
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|a Changes in large-scale dynamics over West Africa-the strength and position of zonal jets-are a key interim step by which local and remote forcing is communicated into changes in rainfall. This study identifies a key mode of jet variability and demonstrates how it is strongly coupled with rainfall. The approach provides a quantitative framework to assess jet-rainfall coupling and a useful tool to investigate the concerning spread in CMIP5 rainfall projections over the West African Sahel. It is shown that many CMIP5 simulations fail to capture this coupling, indicating a fundamental limitation in their ability to predict future rainfall conditions. The results demonstrate that West African rainfall in the coming CMIP6 ensemble should be interpreted with caution; key atmospheric processes that deliver rainfall must be validated before conducting detailed analysis on rainfall. Keywords: Africa; Dynamics; Jets; Monsoons; Hydrometeorology; Model evaluation/performance
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|a United States. National Aeronautics and Space Administration (Grant NNX09AK26G)
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|a Article
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|t Journal of Climate
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