Articles | Volume 22, issue 1
https://doi.org/10.5194/cp-22-1-2026
https://doi.org/10.5194/cp-22-1-2026
Research article
 | 
08 Jan 2026
Research article |  | 08 Jan 2026

The relative impacts of tropical Pacific teleconnections and local insolation on mid-Holocene precipitation over tropical South America

Minn Lin Wong and Xianfeng Wang

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Cited articles

Barr, C., Tibby, J., Leng, M. J., Tyler, J. J., Henderson, A. C. G., Overpeck, J. T., Simpson, G. L., Cole, J. E., Phipps, S. J., Marshall, J. C., McGregor, G. B., Hua, Q., and McRobie, F. H.: Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation, Sci. Rep., 9, 1627, https://doi.org/10.1038/s41598-019-38626-3, 2019. 
Battisti, D. S., Ding, Q., and Roe, G. H.: Coherent pan-Asian climatic and isotopic response to orbital forcing of tropical insolation, Journal of Geophys. Res.-Atmos., 119, 11997–12020, https://doi.org/10.1002/2014JD021960, 2014. 
Bernal, J. P., Cruz, F. W., Stríkis, N. M., Wang, X., Deininger, M., Catunda, M. C. A., Ortega-Obregón, C., Cheng, H., Edwards, R. L., and Auler, A. S.: High-resolution Holocene South American monsoon history recorded by a speleothem from Botuverá Cave, Brazil, Earth Planet. Sc. Lett., 450, 186–196, https://doi.org/10.1016/j.epsl.2016.06.008, 2016. 
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Short summary
This study shows that tropical Pacific Ocean conditions shaped both precipitation and its isotopic signals in South America about 6,000 years ago. Using climate modelling and proxy records, we demonstrate how changes in tropical Pacific sea-surface temperatures, together with shifts in solar radiation, influenced past hydroclimate. These findings highlight the sensitivity of rainfall to Pacific Ocean variability, offering insights into how future climate change may affect rainfall patterns.
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