Abstract
In Chaps. 3–5 the impact of the GW, the AMV and the IPO on precipitation in the Sahel, the Amazon and the Northeast regions has been analyzed separately. In this chapter we evaluate how much of the total rainfall variability is modulated by each one of these SST modes at decadal-to-multidecadal time scales arises. To this end we analyze the variance of the low-frequency index of precipitation at each region that the three modes of SST explain through a multi-linear regression model. In this way, we can quantify the contribution of each SST mode to the total rainfall decadal-to-multidecadal variability in observations and find whether the CMIP5 models reproduce a similar behavior. From the RCP8.5 future projections, the same analysis provides an insight on whether the modulating roles of the SST modes on the rainfall regimes are expected to change in the future.
The content of this chapter referring to the contribution of the SST modes on the Sahel rainfall decadal variability is in preparation for publication in the following article: Villamayor and Mohino (2019): SST drivers of Sahel rainfall at decadal timescales in CMIP5 simulations. (In preparation).
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Villamayor, J. (2020). Contribution of the SST Modes to Rainfall Variability. In: Influence of the Sea Surface Temperature Decadal Variability on Tropical Precipitation: West African and South American Monsoon. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-20327-6_6
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