McPhaden, M. J., Zebiak, S. E. & Glantz, M. H. ENSO as an integrating concept in Earth science. Science 314, 1740–1745 (2006).
Bjerknes, J. A possible response of the atmospheric Hadley circulation to equatorial anomalies of ocean temperature. Tellus 18, 820–829 (1966).
Bjerknes, J. Atmospheric teleconnections from the equatorial Pacific. Mon. Weather Rev. 97, 163–172 (1969).
Carrillo, C. N. Disertación sobre las corrientes y estudios de la corriente Peruana de Humboldt. Bol. Soc. Geogr. Lima 11, 72–110 (1892).
Aceituno, P. On the functioning of the Southern Oscillation in the South American sector. Part I: surface climate. Mon. Weather Rev. 116, 505–524 (1988).
Rao, V. B. & Hada, K. Characteristics of rainfall over Brazil: annual variations and connections with the Southern Oscillation. Theor. Appl. Climatol. 42, 81–91 (1990).
Grimm, A. M., Ferraz, S. E. & Gomes, J. Precipitation anomalies in southern Brazil associated with El Niño and La Niña events. J. Clim. 11, 2863–2880 (1998).
Grimm, A. M., Barros, V. R. & Doyle, M. E. Climate variability in southern South America associated with El Niño and La Niña events. J. Clim. 13, 35–58 (2000). Offers a comprehensive view of the precipitation and circulation anomalies associated with the various stages of El Niño and La Niña events over southern South America.
Barros, V. R., Grimm, A. M. & Doyle, M. E. Relationship between temperature and circulation in southeastern South America and its influence from El Niño and La Niña events. J. Meteorol. Soc. Jpn. Ser. II 80, 21–32 (2002).
Ropelewski, C. F. & Halpert, M. S. Global and regional scale precipitation patterns associated with the El Niño/Southern Oscillation. Mon. Weather Rev. 115, 1606–1626 (1987).
Ropelewski, C. F. & Halpert, M. S. Precipitation patterns associated with the high index phase of the Southern Oscillation. J. Clim. 2, 268–284 (1989).
Takahashi, K. & Martínez, A. G. The very strong coastal El Niño in 1925 in the far-eastern Pacific. Clim. Dyn. 52, 7389–7415 (2019).
Rasmusson, E. M. & Carpenter, T. H. Variations in tropical sea surface temperature and surface wind fields associated with the Southern Oscillation/El Niño. Mon. Weather Rev. 110, 354–384 (1982).
Anderson, W. B., Seager, R., Baethgen, W., Cane, M. & You, L. Synchronous crop failures and climate-forced production variability. Sci. Adv. 5, eaaw1976 (2019).
Lehodey, P. et al. Climate variability, fish, and fisheries. J. Clim. 19, 5009–5030 (2006).
Bouma, M. J. et al. Predicting high-risk years for malaria in Colombia using parameters of El Niño Southern Oscillation. Trop. Med. Int. Health 2, 1122–1127 (1997).
Poveda, G. et al. Coupling between annual and ENSO timescales in the malaria-climate association in Colombia. Environ. Health Perspect. 109, 489–493 (2001). Provides evidence that the El Niño phenomenon intensifies the annual cycle of malaria cases in endemic areas of Colombia as a consequence of concomitant anomalies in the normal annual cycle of temperature and precipitation.
Aragão, L. E. O. C. et al. 21st Century drought-related fires counteract the decline of Amazon deforestation carbon emissions. Nat. Commun. 9, 536 (2018).
Poveda, G., Jaramillo, A., Gil, M. M., Quiceno, N. & Mantilla, R. Seasonality in ENSO related precipitation, river discharges, soil moisture, and vegetation index (NDVI) in Colombia. Water Resour. Res. 37, 2169–2178 (2001).
Acevedo, E. C., Turbay, S., Hurlbert, M., Barco, M. H. & Lopez, K. J. Governance and climate variability in Chinchiná River, Colombia. Int. J. Clim. Change Strateg. Manag. 8, 632–653 (2016).
Jiménez-Muñoz, J. C. et al. Record-breaking warming and extreme drought in the Amazon rainforest during the course of El Niño 2015–2016. Sci. Rep. 6, 33130 (2016).
Malhi, Y. et al. Climate change, deforestation, and the fate of the Amazon. Science 319, 169–172 (2008).
Marengo, J. A. et al. Climatic characteristics of the 2010–2016 drought in the semiarid Northeast Brazil region. An. Acad. Bras. Cienc. 90, 1973–1985 (2018).
Takahashi, K. et al. The 2017 coastal El Niño [in State of the Climate in 2017]. Bull. Am. Meteorol. Soc. 99, S210–S211 (2018).
Peng, Q., Xie, S. P., Wang, D., Zheng, X. T. & Zhang, H. Coupled ocean-atmosphere dynamics of the 2017 extreme coastal El Niño. Nat. Commun. 10, 298 (2019).
Grimm, A. M. & Tedeschi, R. G. ENSO and extreme rainfall events in South America. J. Clim. 22, 1589–1609 (2009).
Tachini, M. Flood Damage Assessment in the Municipality of Blumenau (in Portuguese). Doctoral thesis, Federal Univ. Santa Catarina, 179 pp (2010).
ONEMI. Annual Summary of Natural Hazards and Emergencies. Technical report, Oficina Nacional de Emergencias, Chile. 53 pp (1997).
Aldunce Ide, P. & González, M. Desastres asociados al clima en la agricultura y medio rural en Chile. Departamento de Ciencias Ambientales y Recursos Naturales Renovables, Facultad de Ciencias Agronómicas, Universidad de Chile; Fundación para la Innovación Agraria (FIA), Ministerio de Agricultura (2009).
Quinn, W. H., Neal, V. T. & De Mayolo, S. E. A. El Niño occurrences over the past four and a half centuries. J. Geophys. Res. Oceans 92, 14449–14461 (1987). Documents El Niño occurrences over a multi-century period based on evidence from the west coast region of northern South America and its adjacent Pacific Ocean waters.
Meggers, B. J. Archeological evidence for the impact of mega-Niño events on Amazonia during the past two millennia. Clim. Change 28, 321–338 (1994).
Czaja, A. & Frankignoul, C. Observed impact of Atlantic SST anomalies on the North Atlantic Oscillation. J. Clim. 15, 606–623 (2002).
Giannini, A., Saravanan, R. & Chang, P. The preconditioning role of tropical Atlantic variability in the development of the ENSO teleconnection: implications for the prediction of Nordeste rainfall. Clim. Dyn. 22, 839–855 (2004).
Chang, P., Fang, Y., Saravanan, R., Ji, L. & Seidel, H. The cause of the fragile relationship between the Pacific El Niño and the Atlantic Niño. Nature 443, 324–328 (2006).
Rodrigues, R. R. & McPhaden, M. J. Why did the 2011–2012 La Niña cause a severe drought in the Brazilian Northeast? Geophys. Res. Lett. 41, 1012–1018 (2014).
Ashok, K., Behera, S. K., Rao, S. A., Weng, H. & Yamagata, T. El Niño Modoki and its possible teleconnection. J. Geophys. Res. Oceans 112, C11007 (2007).
Takahashi, K., Montecinos, A., Goubanova, K. & Dewitte, B. ENSO regimes: Reinterpreting the canonical and Modoki El Niño. Geophys. Res. Lett. 38, L10704 (2011). Provides independent indices that differentiate central and eastern Pacific El Niño events and the asymmetry with their La Niña counterparts.
Hill, K. J., Taschetto, A. S. & England, M. H. South American rainfall impacts associated with inter-El Niño variations. Geophys. Res. Lett. 36, L19702 (2009).
McPhaden, M. J. Evolution of the 2002/03 El Niño. Bull. Am. Meteorol. Soc. 85, 677–695 (2004). Describes the contrasting rainfall anomalies in the coastal zone of western South America associated with the 2002–03 El Niño (a central Pacific event) and the 1997–98 El Niño (an eastern Pacific event).
Rodrigues, R. R., Haarsma, R. J., Campos, E. J. D. & Ambrizzi, T. The impacts of inter-El Niño variability on the tropical Atlantic and northeast Brazil climate. J. Clim. 24, 3402–3422 (2011).
Tedeschi, R. G., Grimm, A. M. & Cavalcanti, I. F. Influence of Central and East ENSO on extreme events of precipitation in South America during austral spring and summer. Int. J. Climatol. 35, 2045–2064 (2015). Outlines the magnitude and geographic variability of precipitation anomalies in South America associated with central Pacific and eastern Pacific El Niño and La Niña events.
Tedeschi, R. G., Grimm, A. M. & Cavalcanti, I. F. Influence of Central and East ENSO on precipitation and its extreme events in South America during austral autumn and winter. Int. J. Climatol. 36, 4797–4814 (2016).
McPhaden, M. J. Playing hide and seek with El Niño. Nat. Clim. Change 5, 791–795 (2015).
L’Heureux, M. L. et al. Observing and predicting the 2015/16 El Niño. Bull. Am. Meteorol. Soc. 98, 1363–1382 (2017).
Santoso, A., McPhaden, M. J. & Cai, W. The defining characteristics of ENSO extremes and the strong 2015/2016 El Niño. Rev. Geophys. 55, 1079–1129 (2017).
Izumo, T. et al. Influence of the state of the Indian Ocean Dipole on the following year’s El Niño. Nat. Geosci. 3, 168–172 (2010).
Kug, J.-S. & Kang, I.-S. Interactive feedback between ENSO and the Indian Ocean. J. Clim. 19, 1784–1801 (2006). Suggests that an anomalous warming in the Indian Ocean produces an easterly wind anomaly over the western Pacific, which helps termination of an El Niño and its transition to La Niña.
Kucharski, F., Syed, F. S., Burhan, A., Farah, I. & Gohar, A. Tropical Atlantic influence on Pacific variability and mean state in the twentieth century in observations and CMIP5. Clim. Dyn. 44, 881–896 (2015).
Cai, W. et al. Pantropical climate interactions. Science 363, eaav4236 (2019).
Saji, N. H., Goswami, B. N., Vinayachandran, P. N. & Yamagata, T. A dipole mode in the tropical Indian Ocean. Nature 401, 360–363 (1999).
Vera, C. S. & Silvestri, G. Precipitation interannual variability in South America from the WCRP-CMIP3 multi-model dataset. Clim. Dyn. 32, 1003–1014 (2009).
Saji, N. H., Ambrizzi, T. & Ferraz, S. E. T. Indian Ocean Dipole mode events and austral surface air temperature anomalies. Dyn. Atmos. Oceans 39, 87–101 (2005).
Andreoli, R. V. & Kayano, M. T. ENSO-related rainfall anomalies in South America and associated circulation features during warm and cold Pacific decadal oscillation regimes. Int. J. Climatol. 25, 2017–2030 (2005).
Kayano, M. T. & Capistrano, V. B. How the Atlantic multidecadal oscillation (AMO) modifies the ENSO influence on the South American rainfall. Int. J. Climatol. 34, 162–178 (2014).
Fernandes, L. G. & Rodrigues, R. R. Changes in the patterns of extreme rainfall events in southern Brazil. Int. J. Climatol. 38, 1337–1352 (2018).
Ham, Y.-G., Kug, J.-S., Park, J.-Y. & Jin, F.-F. Sea surface temperature in the north tropical Atlantic as a trigger for El Niño/Southern Oscillation events. Nat. Geosci. 6, 112–116 (2013).
Garreaud, R. D. et al. The Central Chile Mega Drought (2010–2018): a climate dynamics perspective. Int. J. Climatol. 39, 421–439 (2019).
Gong, D. & Wang, S. Definition of Antarctic oscillation index. Geophys. Res. Lett. 26, 459–462 (1999).
Power, S., Casey, T., Folland, C., Colman, A. & Mehta, V. Inter-decadal modulation of the impact of ENSO on Australia. Clim. Dyn. 15, 319–324 (1999).
Levine, A. F. Z., McPhaden, M. J. & Frierson, D. M. W. The impact of the AMO on multidecadal ENSO variability. Geophys. Res. Lett. 44, 3877–3886 (2017).
Garreaud, R. D., Vuille, M., Compagnucci, R. & Marengo, J. Present-day South American Climate. Palaeogeogr. Palaeoclimatol. Palaeoecol. 281, 180–195 (2009).
Poveda, G., Waylen, P. R. & Pulwarty, R. Modern climate variability in northern South America and southern Mesoamerica. Palaeogeogr. Palaeoclimatol. Palaeoecol. 234, 3–27 (2006).
Montoya, G., Pelkowski, J. & Eslava, J. A. On the northeastern trade winds and the existence of a low-level jet over the piedmont of the Eastern Andes [in Spanish]. Rev. Acad. Colomb. Cienc. 25, 363–370 (2001).
Poveda, G. & Mesa, O. J. The CHOCO low-level jet and two other jets over Colombia: climatology and variability during ENSO [in Spanish]. Rev. Acad. Colomb. Cienc. 23, 517–528 (1999).
Grimm, A. M., Vera, C. S. & Mechoso, C. R. in The Global Monsoon System: Research and Forecast (eds Chang, C.-P., Wang, B. & Lau, N.-C. G.) 219–238 (WMO, 2005).
Marengo, J. A. et al. Recent developments on the South American monsoon system. Int. J. Climatol. 32, 1–21 (2012).
Kodama, Y.-M. Large-scale common features of subtropical precipitation zones (the Baiu frontal zone, the SPCZ, and the SACZ). Part I: characteristics of subtropical frontal zones. J. Meteorol. Soc. Jpn. Ser. II 70, 813–836 (1992).
Lenters, J. D. & Cook, K. H. On the origin of the Bolivian high and related circulation features of the South American climate. J. Atmos. Sci. 54, 656–678 (1997).
Vera, C. et al. The South American low-level jet experiment. Bull. Am. Meteorol. Soc. 87, 63–78 (2006).
Zhou, J. & Lau, K.-M. Does a monsoon climate exist over South America? J. Clim. 11, 1020–1040 (1998).
Carvalho, L. M. V., Jones, C. & Liebmann, B. The South Atlantic convergence zone: intensity, form, persistence, and relationships with intraseasonal to interannual activity and extreme rainfall. J. Clim. 17, 88–108 (2004).
Marengo, J. A. et al. Climatology of the low-level jet east of the Andes as derived from the NCEP–NCAR reanalyses: characteristics and temporal variability. J. Clim. 17, 2261–2280 (2004). Illustrates that the South American low-level jet occurs all year long, bringing tropical moist air masses from the Amazon to southern Brazil–northern Argentina more frequently in the warm season, but tropical maritime air more frequently during the cold season.
Liebmann, B. et al. Subseasonal variations of rainfall in South America in the vicinity of the low-level jet east of the Andes and comparison to those in the South Atlantic convergence zone. J. Clim. 17, 3829–3842 (2004).
Salio, P., Nicolini, M. & Zipser, E. J. Mesoscale convective systems over southeastern South America and their relationship with the South American low-level jet. Mon. Weather Rev. 135, 1290–1309 (2007).
Fuenzalida, H., Sánchez, R. & Garreaud, R. D. A climatology of cutoff lows in the Southern Hemisphere. J. Geophys. Res. Atmos. 110, D18101 (2005).
Viale, M., Valenzuela, R., Garreaud, R. D. & Ralph, R. M. Impacts of atmospheric rivers on precipitation in southern South America. J. Hydrometeorol. 19, 1671–1687 (2018).
Gimeno, L. et al. Major mechanisms of atmospheric moisture transport and their role in extreme precipitation events. Annu. Rev. Environ. Resour. 41, 117–141 (2016).
Hu, Z. Z., Huang, B., Zhu, J., Kumar, A. & McPhaden, M. J. On the variety of coastal El Niño events. Clim. Dyn. 52, 7537–7552 (2019).
Takahashi, K. & Dewitte, B. Strong and moderate nonlinear El Niño regimes. Clim. Dyn. 46, 1627–1645 (2016).
Chiang, J. C. H., Kushnir, Y. & Giannini, A. Deconstructing Atlantic intertropical convergence zone variability: influence of the local cross-equatorial sea surface temperature gradient and remote forcing from the eastern equatorial Pacific. J. Geophys. Res. Atmos. 107, ACL 3-1–ACL 3-19 (2002).
Grimm, A. M. The El Niño impact on the summer monsoon in Brazil: regional processes versus remote influences. J. Clim. 16, 263–280 (2003).
Grimm, A. M. & Ambrizzi, T. in Past Climate Variability in South America and Surrounding Regions. Developments in Paleoenvironmental Research Vol. 14 (eds Vimeaux, F., Sylvestre, F. & Khodri, M.) 159–191 (Springer, 2009).
Sasaki, W., Doi, T., Richards, K. J. & Masumoto, Y. The influence of ENSO on the equatorial Atlantic precipitation through the Walker circulation in a CGCM. Clim. Dyn. 44, 191–202 (2015).
Ropelewski, C. F. & Bell, M. A. Shifts in the statistics of daily rainfall in South America conditional on ENSO phase. J. Clim. 21, 849–865 (2008).
Fernández-Álamo, M. A. & Färber-Lorda, J. Zooplankton and the oceanography of the eastern tropical Pacific: a review. Prog. Oceanogr. 69, 318–359 (2006).
Wallace, J. M. & Gutzler, D. S. Teleconnections in the geopotential height field during the northern hemisphere winter. Mon. Weather Rev. 109, 784–812 (1981).
Horel, J. D. & Wallace, J. M. Planetary-scale atmospheric phenomena associated with the Southern Oscillation. Mon. Weather Rev. 109, 813–829 (1981).
Mo, K. C. & Ghil, M. Statistics and dynamics of persistent anomalies. J. Atmos. Sci. 44, 877–902 (1987). Finds that an equivalent barotropic-wave-train pattern of circulation anomalies — the Pacific–South American (PSA) pattern — occurs in response to anomalous convective heating in the equatorial Pacific, extending over the south Pacific Ocean to South America.
Karoly, D. J. Southern hemisphere circulation features associated with El Niño–Southern Oscillation events. J. Clim. 2, 1239–1252 (1989).
Mo, K. C. Relationships between low-frequency variability in the southern hemisphere and sea surface temperature anomalies. J. Clim. 13, 3599–3610 (2000).
Cazes-Boezio, G., Robertson, A. W. & Mechoso, C. R. Seasonal dependence of ENSO teleconnections over South America and relationships with precipitation in Uruguay. J. Clim. 16, 1159–1176 (2003).
Silva, G. A. M. & Ambrizzi, T. Inter-El Niño variability and its impact on the South American low-level jet east of the Andes during austral summer–two case studies. Adv. Geosci. 6, 283–287 (2006).
Montini, T. L., Jones, C. & Carvalho, L. M. The South American low-level jet: a new climatology, variability, and changes. J. Geophys. Res. Atmos. 124, 1200–1218 (2019).
Diaz, A. F., Studzinski, C. D. & Mechoso, C. R. Relationships between precipitation anomalies in Uruguay and southern Brazil and sea surface temperature in the Pacific and Atlantic oceans. J. Clim. 11, 251–271 (1998).
Rutllant, J. & Fuenzalida, H. Synoptic aspects of the central Chile rainfall variability associated with the southern oscillation. Int. J. Climatol. 11, 63–76 (1991).
Hastenrath, S. Circulation and teleconnection mechanisms of northeast Brazil droughts. Prog. Oceanogr. 70, 407–415 (2006).
Xie, S.-P. & Philander, S. G. H. A coupled ocean–atmosphere model of relevance to the ITCZ in the eastern Pacific. Tellus A 46, 340–350 (1994).
Chang, P., Ji, L. & Li, H. A decadal climate variation in the tropical Atlantic Ocean from thermodynamic air–sea interactions. Nature 385, 516–518 (1997).
Nobre, P. & Shukla, J. Variations of sea surface temperature, wind stress, and rainfall over the tropical Atlantic and South America. J. Clim. 9, 2464–2479 (1996). Shows that north-eastern Brazil droughts are a local manifestation of a large-scale rainfall-anomaly pattern encompassing the whole equatorial Atlantic and Amazon region, related to an early withdrawal of the intertropical convergence zone towards the warm SST anomalies over the northern tropical Atlantic.
Chiang, J. C. H. & Vimont, D. Analogous Pacific and Atlantic meridional modes of tropical atmosphere–ocean variability. J. Clim. 17, 4143–4158 (2004).
Pezzi, L. P. & Cavalcanti, I. F. A. The relative importance of ENSO and tropical Atlantic sea surface temperature anomalies for seasonal precipitation over South America: a numerical study. Clim. Dyn. 17, 205–212 (2001).
Kayano, M. T., Andreoli, R. V., de Souza, R. A. F. & Garcia, S. R. Spatiotemporal variability modes of surface air temperature in South America during the 1951–2010 period: ENSO and non-ENSO components. Int. J. Climatol. 37, 1–13 (2017).
Li, Y. et al. Two leading modes of the interannual variability in South American surface air temperature during austral winter. Clim. Dyn. 51, 2141–2156 (2018).
Capotondi, A. et al. Understanding ENSO diversity. Bull. Am. Meteorol. Soc. 96, 921–938 (2015).
Cai, W. et al. ENSO and greenhouse warming. Nat. Clim. Change 5, 849–859 (2015).
Cai, W. et al. Increased variability of eastern Pacific El Niño under greenhouse warming. Nature 564, 201–206 (2018).
Kug, J. S., Jin, F. F. & An, S.-I. Two types of El Niño events: cold tongue El Niño and warm pool El Niño. J. Clim. 22, 1499–1515 (2009).
Mosquera-Vásquez, K., Dewitte, B. & Illig, S. The Central Pacific El Niño intraseasonal Kelvin wave. J. Geophys. Res. Oceans 119, 6605–6621 (2014).
Frauen, C., Dommenget, D., Tyrrell, N., Rezny, M. & Wales, S. Analysis of the nonlinearity of El Niño–Southern Oscillation teleconnections. J. Clim. 27, 6225–6244 (2014). Finds that the atmospheric-circulation response is stronger for El Niño events compared with La Niña, and for eastern Pacific compared with central Pacific ENSO events, leading to strong regional differences in ENSO teleconnections.
Lee, T. & McPhaden, M. J. Increasing intensity of El Niño in the central-equatorial Pacific. Geophys. Res. Lett. 37, L14603 (2010).
McPhaden, M. J., Lee, T. & McClurg, D. El Niño and its relationship to changing background conditions in the tropical Pacific Ocean. Geophys. Res. Lett. 38, L15709 (2011).
Yeh, S. W., Kirtman, B. P., Kug, J. S., Park, W. & Latif, M. Natural variability of the central Pacific El Niño event on multi-centennial timescales. Geophys. Res. Lett. 38, L02704 (2011). Shows that variations in the frequency of central Pacific El Niño versus that of eastern Pacific El Niño can occur without forcing of greenhouse warming.
Hill, K. J., Taschetto, A. S. & England, M. H. Sensitivity of South American summer rainfall to tropical Pacific Ocean SST anomalies. Geophys. Res. Lett. 38, L01701 (2011). Shows opposite rainfall responses when SST warming occurs in the eastern as opposed to the western half of the equatorial Pacific.
Lavado-Casimiro, W. & Espinoza, J. C. Impacts of El Niño and La Niña in the precipitation over Perú (1965–2007). Rev. Bras. Meteorol. 29, 171–182 (2014).
Vicente-Serrano, S. M. et al. The complex influence of ENSO on droughts in Ecuador. Clim. Dyn. 48, 405–427 (2017).
Rodrigues, R. R., Campos, E. J. D. & Haarsma, R. The impact of ENSO on the South Atlantic subtropical dipole mode. J. Clim. 28, 2691–2705 (2015).
Amaya, D. J. & Foltz, G. R. Impacts of canonical and Modoki El Niño on tropical Atlantic SST. J. Geophys. Res. Oceans 119, 777–789 (2014).
Taschetto, A. S., Rodrigues, R. R., Meehl, G. A., McGregor, S. & England, M. H. How sensitive are the Pacific–tropical North Atlantic teleconnections to the position and intensity of El Niño-related warming? Clim. Dyn. 46, 1841–1860 (2016).
Navarro-Monterroza, E., Arias, P. A. & Vieira, S. C. El Niño-Oscilación del Sur, fase Modoki, y sus efectos en la variabilidad espacio-temporal de la precipitación en Colombia. Rev. Acad. Colomb. Cienc. Exactas Fis. Nat. 43, 120–132 (2019).
Grimm, A. M., Pal, J. S. & Giorgi, F. Connection between spring conditions and peak summer monsoon rainfall in South America: role of soil moisture, surface temperature, and topography in eastern Brazil. J. Clim. 20, 5929–5945 (2007).
Barreiro, M. & Díaz, N. Land–atmosphere coupling in El Niño influence over South America. Atmos. Sci. Lett. 12, 351–355 (2011).
Builes-Jaramillo, A., Marwan, N., Poveda, G. & Kurths, J. Nonlinear interactions between the Amazon River basin and the Tropical North Atlantic at interannual timescales. Clim. Dyn. 50, 2951–2969 (2018). Shows that a lower-than-normal rainfall over the Amazon basin decreases the pressure gradient between the Amazon and the tropical North Atlantic, weakens the north-easterly trades, intensifies warming of the tropical North Atlantic, in turn, reinforcing the rainfall decrease over the Amazon basin.
Dewitte, B. & Takahashi, K. Diversity of moderate El Niño events evolution: role of air–sea interactions in the eastern tropical Pacific. Clim. Dyn. 52, 7455–7476 (2019).
Haarsma, R. J., Campos, E. J. D. & Molteni, F. Atmospheric response to South Atlantic SST dipole. Geophys. Res. Lett. 30, 1864 (2003).
Jahfer, S., Vinayachandran, P. N. & Nanjundiah, R. S. Long-term impact of Amazon river runoff on northern hemispheric climate. Sci. Rep. 7, 10989 (2017).
Poveda, G., Gil, M. M. & Quiceno, N. The annual cycle of Colombia’s hydrology and its relationship with ENSO and NAO. Bull. Am. Meteorol. Soc. 27, 721–731 (1998).
Taschetto, A. S. & Ambrizzi, T. Can Indian Ocean SST anomalies influence South American rainfall? Clim. Dyn. 38, 1615–1628 (2012).
Chan, S. C., Behera, S. K. & Yamagata, T. Indian Ocean Dipole influence on South American rainfall. Geophys. Res. Lett. 35, L14S12 (2008). Outlines that a positive Indian Ocean Dipole excites a dipolar pattern in rainfall anomalies, with reduced rainfall over central Brazil but increased rainfall over La Plata Basin during austral spring.
Cai, W., van Rensch, P., Cowan, T. & Hendon, H. H. Teleconnection pathways of ENSO and the IOD and the mechanisms for impacts on Australian rainfall. J. Clim. 24, 3910–3923 (2011).
Vera, C. S. & Osman, M. Activity of the Southern Annular Mode during 2015–2016 El Niño event and its impact on Southern Hemisphere climate anomalies. Int. J. Climatol. 38, e1288–e1295 (2018).
León-Muñoz, J. et al. Hydroclimatic conditions trigger record harmful algal bloom in western Patagonia (summer 2016). Sci. Rep. 8, 1330 (2018).
An, S. I. & Wang, B. Interdecadal change of the structure of the ENSO mode and its impact on the ENSO frequency. J. Clim. 13, 2044–2055 (2000).
da Silva, G. A. M., Drumond, A. & Ambrizzi, T. The impact of El Niño on South American summer climate during different phases of the Pacific decadal oscillation. Theor. Appl. Climatol. 106, 307–319 (2011).
Poveda, G., Alvarez, D. M. & Rueda, O. A. Hydroclimatic variability over the Andes of Colombia associated with ENSO: a review of climatic processes and their impact on one of the Earth’s most important biodiversity hotspots. Clim. Dyn. 36, 2233–2249 (2011).
Wang, G. & Cai, W. Climate-change impact on the 20th-century relationship between the Southern Annular Mode and global mean temperature. Sci. Rep. 3, 2039 (2013).
Ham, Y. G., Choi, J. Y. & Kug, J. S. The weakening of the ENSO–Indian Ocean Dipole (IOD) coupling strength in recent decades. Clim. Dyn. 49, 249–261 (2017).
McGregor, S. et al. Recent Walker circulation strengthening and Pacific cooling amplified by Atlantic warming. Nat. Clim. Change 4, 888–892 (2014).
Wang, L., Yu, J.-Y. & Paek, H. Enhanced biennial variability in the Pacific due to Atlantic capacitor effect. Nat. Commun. 8, 14887 (2017). Shows that a warmer Atlantic since the early 1990s — a result of the positive phase of Atlantic multidecadal oscillation and a global warming trend — has enhanced the biennial cycle of ENSO events.
Cai, W. & Cowan, T. Trends in Southern Hemisphere circulation in IPCC AR4 models over 1950–99: Ozone depletion versus greenhouse forcing. J. Clim. 20, 681–693 (2007).
Barnston, A. G. et al. Verification of the first 11 years of IRI’s seasonal climate forecasts. J. Appl. Meteorol. Climatol. 49, 493–520 (2010).
Bombardi, R. J. et al. Seasonal predictability of summer rainfall over South America. J. Clim. 31, 8181–8195 (2018).
Zhao, M., Hendon, H. H., Alves, O., Liu, G. & Wang, G. Weakened Eastern Pacific El Niño predictability in the early twenty-first century. J. Clim. 29, 6805–6822 (2016).
Giannini, A., Chiang, J. C. H., Cane, M. A., Kushnir, Y. & Seager, R. The ENSO teleconnection to the tropical Atlantic Ocean: contributions of the remote and local SSTs to rainfall variability in the tropical Americas. J. Clim. 14, 4530–4544 (2001).
Richter, I. et al. On the triggering of Benguela Niños: remote equatorial versus local influences. Geophys. Res. Lett. 37, L20604 (2010).
Barreiro, M. Influence of ENSO and the South Atlantic Ocean on climate predictability over southeastern South America. Clim. Dyn. 35, 1493–1508 (2010).
Keenlyside, N. S., Ding, H. & Latif, M. Potential of equatorial Atlantic variability to enhance El Niño prediction. Geophys. Res. Lett. 40, 2278–2283 (2013).
Luo, J.-J., Liu, G., Hendon, H., Alves, O. & Yamagata, T. Inter-basin sources for two-year predictability of the multi-year La Niña event in 2010–2012. Sci. Rep. 7, 2276 (2017).
Ren, H. L., Zuo, J. & Deng, Y. Statistical predictability of Niño indices for two types of ENSO. Clim. Dyn. 52, 5361–5382 (2019).
Dayan, H., Vialard, J., Izumo, T. & Lengaigne, M. Does sea surface temperature outside the tropical Pacific contribute to enhanced ENSO predictability? Clim. Dyn. 43, 1311–1325 (2014).
Chikamoto, Y. et al. Skilful multi-year predictions of tropical trans-basin climate variability. Nat. Commun. 6, 6869 (2015).
Boulanger, J.-P., Martinez, F. & Segura, E. C. Projection of future climate change conditions using IPCC simulations, neural networks and Bayesian statistics. Part 2: precipitation mean state and seasonal cycle in South America. Clim. Dyn. 28, 255–271 (2007).
Junquas, C., Vera, C. S., Li, L. & Le Treut, H. Impact of projected SST changes on summer rainfall in southeastern South America. Clim. Dyn. 40, 1569–1589 (2013).
Jones, C. & Carvalho, L. M. V. Climate change in the South American monsoon system: present climate and CMIP5 projections. J. Clim. 26, 6660–6678 (2013).
Li, W., Fu, R. & Dickinson, R. E. Rainfall and its seasonality over the Amazon in the 21st century as assessed by the coupled models for the IPCC AR4. J. Geophys. Res. Atmos. 111, D02111 (2006). Shows that an El Niño-like sea-surface temperature change and warming in the northern tropical Atlantic enhances atmospheric subsidence and reduces clouds over the Amazon.
Bombardi, R. & Carvalho, L. IPCC global coupled model simulations of the South America monsoon system. Clim. Dyn. 33, 893–916 (2009).
Karamperidou, C., Jin, F. F. & Conroy, J. L. The importance of ENSO nonlinearities in tropical Pacific response to external forcing. Clim. Dyn. 49, 2695–2704 (2017).
Grimm, A. M. & Natori, A. A. Climate change and interannual variability of precipitation in South America. Geophys. Res. Lett. 33, L19706 (2006).
da Rocha, R. P., Reboita, M. S., Dutra, L. M. M., Llopart, M. P. & Coppola, E. Interannual variability associated with ENSO: present and future climate projections of RegCM4 for South America-CORDEX domain. Clim. Change 125, 95–109 (2014).
Perry, S. J., McGregor, S., Gupta, A. S., England, M. H. & Maher, N. Projected late 21st century changes to the regional impacts of the El Niño-Southern Oscillation. Clim. Dyn. 54, 395–412 (2020).
Cai, W. et al. Increased frequency of extreme La Niña events under greenhouse warming. Nat. Clim. Change 5, 132–137 (2015).
Christidis, N., Betts, R. A. & Stott, P. A. The extremely wet March of 2017 in Peru. Bull. Am. Meteorol. Soc. 100, S31–S35 (2019).
Kim, J. S., Kug, J. S. & Jeong, S. J. Intensification of terrestrial carbon cycle related to El Niño–Southern oscillation under greenhouse warming. Nat. Commun. 8, 1674 (2017).
Power, S. B. & Delage, F. P. D. El Niño–Southern Oscillation and associated climatic conditions around the world during the latter half of the twenty-first century. J. Clim. 31, 6189–6207 (2018).
Blázquez, J. & Nuñez, M. N. Analysis of uncertainties in future climate projections for South America: comparison of WCRP-CMIP3 and WCRP-CMIP5 models. Clim. Dyn. 41, 1039–1056 (2013).
Tedeschi, R. G. & Collins, M. The influence of ENSO on South American precipitation: simulation and projection in CMIP5 models. Int. J. Climatol. 37, 3319–3339 (2017).
Mora, C. et al. Global risk of deadly heat. Nat. Clim. Change 7, 501–506 (2017).
Zilli, M. T., Carvalho, L. M. V. & Lintner, B. R. The poleward shift of South Atlantic Convergence Zone in recent decades. Clim. Dyn. 52, 2545–2563 (2019).
Bedoya-Soto, J. M., Poveda, G., Trenberth, K. E. & Vélez-Upegui, J. J. Interannual hydroclimatic variability and the 2009–2011 extreme ENSO phases in Colombia: from Andean glaciers to Caribbean lowlands. Theor. Appl. Climatol. 135, 1531–1544 (2019).
Moy, C., Seltzer, G., Rodbell, D. & Anderson, D. Variability of El Niño/Southern Oscillation activity at millennial timescales during the Holocene epoch. Nature 420, 162–165 (2002).
Rodbell, D. et al. An ~15,000-year record of El Niño-driven alluviation in southwestern Ecuador. Science 283, 516–520 (1999). Uses inorganic laminae in an alpine lake near Ecuador to show that El Niño periodicity increases from ~15 years 15,000–7,000 years before present to 2–8.5 years in the modern climate.
Conroy, J., Overpeck, J., Cole, J., Shanahan, T. & Steinitz-Kannan, M. Holocene changes in eastern tropical Pacific climate inferred from a Galápagos lake sediment record. Quat. Sci. Rev. 27, 1166–1180 (2008).
Clement, A. C., Seager, R. & Cane, M. A. Orbital controls on the El Niño/Southern Oscillation and the tropical climate. Paleoceanography 14, 441–456 (1999).
Karamperidou, C., Di Nezio, P. N., Timmermann, A., Jin, F. F. & Cobb, K. M. The response of ENSO flavors to mid-Holocene climate: implications for proxy interpretation. Paleoceanography 30, 527–547 (2015).
Li, G. & Xie, S.-P. Tropical biases in CMIP5 multimodel ensemble: the excessive equatorial Pacific cold tongue and double ITCZ problems. J. Clim. 27, 1765–1780 (2014).
Bellucci, A., Gualdi, S. & Navarra, A. The double-ITCZ syndrome in coupled general circulation models: the role of large-scale vertical circulation regimes. J. Clim. 23, 1127–1145 (2010).
Cai, W. & Cowan, T. Why is the amplitude of the Indian Ocean Dipole overly large in CMIP3 and CMIP5 climate models? Geophys. Res. Lett. 40, 1200–1205 (2013).
McGregor, S., Stuecker, M. F., Kajtar, J. B., England, M. H. & Collins, M. Model tropical Atlantic biases underpin diminished Pacific decadal variability. Nat. Clim. Change 8, 493–498 (2018).
Cai, W., Hendon, H. H. & Meyers, G. A. Indian Ocean dipolelike variability in the CSIRO Mark 3 coupled climate model. J. Clim. 18, 1449–1468 (2005).
Taschetto, A. S. et al. Cold tongue and warm pool ENSO events in CMIP5: mean state and future projections. J. Clim. 27, 2861–2885 (2014).
Ma, H. Y. et al. Impact of land surface processes on the South American warm season climate. Clim. Dyn. 37, 187–203 (2011).
Yin, L., Fu, R., Shevliakova, E. & Dickinson, R. E. How well can CMIP5 simulate precipitation and its controlling processes over tropical South America? Clim. Dyn. 41, 3127–3143 (2013).
Misra, V., Dirmeyer, P. A. & Kirtman, B. P. Dynamic downscaling of seasonal simulations over South America. J. Clim. 16, 103–117 (2003).
Solman, S. A., Nunez, M. N. & Cabré, M. F. Regional climate change experiments over southern South America. I: present climate. Clim. Dyn. 30, 533–552 (2008).
Cavalcanti, I. F., Goddard, L. & Kirtman, B. The future of seasonal prediction in the Americas. VAMOS Newsl. 3, 3–7 (2006).
Grimm, A. M. in Tropical Extremes: Natural Variability and Trends (eds Vuruputur, V., Sukhatme, J., Murtugudde, R. & Roca, R.) 51–93 (Elsevier, 2018).
Rodrigues, R. R., Taschetto, A. S., Gupta, A. S. & Foltz, G. R. Common cause for severe droughts in South America and marine heatwaves in the South Atlantic. Nat. Geosci. 12, 620–626 (2019). Finds that drought in eastern South America and marine heatwaves in the adjacent south Atlantic Ocean are concurrently triggered by tropical convection in the Indian and Pacific oceans, which causes Rossby wave trains with a persistent anticyclonic circulation over the region.
Erfanian, A., Wang, G. & Fomenko, L. Unprecedented drought over tropical South America in 2016: significantly under-predicted by tropical SST. Sci. Rep. 7, 5811 (2017).
Foley, J. A., Botta, A., Coe, M. T. & Costa, M. H. El Niño–Southern oscillation and the climate, ecosystems and rivers of Amazonia. Glob. Biogeochem. Cycles 16, 79-1–79-20 (2002).
Withey, K. et al. Quantifying immediate carbon emissions from El Niño-mediated wildfires in humid tropical forests. Philos. Trans. R. Soc. Lond. B Biol. Sci. 373, 20170312 (2018).
Schneider, U., Fuchs, T., Meyer-Christoffer, A. & Rudolf, B. Global precipitation analysis products of the GPCC. dwd.de https://www.dwd.de/EN/ourservices/gpcc/gpcc.html (2008).
Kalnay, E. et al. The NCEP/NCAR 40-year reanalysis project. Bull. Am. Meteorol. Soc. 77, 437–472 (1996).
Rayner, N. A. et al. Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. J. Geophys. Res. Atmos. 108, 4407 (2003).
Taylor, K. E., Stouffer, R. J. & Meehl, G. A. An overview of CMIP5 and the experimental design. Bull. Am. Meteorol. Soc. 93, 485–498 (2012).