Abstract
This chapter presents the mechanisms and the most important effects of tropics-extratropics and tropics-tropics atmospheric teleconnections with South America on intra-seasonal to interannual time scales. The basis for theoretical understanding of teleconnections is reviewed, as well as the observed Southern Hemisphere interannual and intraseasonal variability. The observed teleconnections with South America are described, indicating linkages between the tropics and extratropics and between different regions in the tropics. Possible mechanisms of these linkages are presented and some teleconnections are analyzed with Influence Functions. Special emphasis is placed on the teleconnections associated with ENSO on interannual time scales and the Madden Julian Oscillation on intraseasonal time scales.
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Acknowledgments:
The authors thank the two anonymous reviewers for their comments and suggestions. A.M.G. acknowledges the support of CNPq (Brazil) and the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement N°212492 (CLARIS LPB. A Europe-South America Network for Climate Change Assessment and Impact Studies in La Plata Basin). T.A. was partially supported by CNPq, FAPESP and CAPES.
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Grimm, A.M., Ambrizzi, T. (2009). Teleconnections into South America from the Tropics and Extratropics on Interannual and Intraseasonal Timescales. In: Vimeux, F., Sylvestre, F., Khodri, M. (eds) Past Climate Variability in South America and Surrounding Regions. Developments in Paleoenvironmental Research, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2672-9_7
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