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Forecasting Andean rainfall and crop yield from the influence of El Niño on Pleiades visibility

Abstract

Farmers in drought-prone regions of Andean South America have historically made observations of changes in the apparent brightness of stars in the Pleiades around the time of the southern winter solstice in order to forecast interannual variations in summer rainfall and in autumn harvests. They moderate the effect of reduced rainfall by adjusting the planting dates of potatoes, their most important crop1. Here we use data on cloud cover and water vapour from satellite imagery, agronomic data from the Andean altiplano and an index of El Niño variability to analyse this forecasting method. We find that poor visibility of the Pleiades in June—caused by an increase in subvisual high cirrus clouds—is indicative of an El Niño year, which is usually linked to reduced rainfall during the growing season several months later. Our results suggest that this centuries-old method2 of seasonal rainfall forecasting may be based on a simple indicator of El Niño variability.

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Figure 1: Correlations with central Andean high cloud in late June.
Figure 2: A diagram of the stars in the Pleiades of visual magnitude 6.0 or brighter.
Figure 3: Central Andean rainfall anomalies and El Niño.
Figure 4: Central Andean harvests and El Niño.

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References

  1. Zimmerer,K. S. Changing Fortunes: Biodiversity and Peasant Livelihood in the Peruvian Andes (Univ. California Press, Berkeley, 1996).

    Google Scholar 

  2. Salomon,F. & Urioste,G. L. The Huarochiri Manuscript: A Testament of Ancient and Colonial Andean Religion (Univ. Texas Press, Austin, 1991 [c. 1608]).

    Google Scholar 

  3. Ballón Aguirre,E., Cerrón Palomino,R. O. & Chambi Apaza,E. Vocabulario Razonado de la Actividad Agraria Andina. Terminología Agraria Quechua. (Centro de Estudios Regionales Andinos “Bartolomé de Las Casas”, Cusco, 1992).

    Google Scholar 

  4. Urton,G. At the Crossroads of the Earth and The Sky: An Andean Cosmology (Univ. Texas Press, Austin, 1981).

    Google Scholar 

  5. Grillo Fernández,E., Quiso Choque,V., Rengifo Vásquez,G. & Valladolid Rivera,J. Crianza Andina de la Chacra (Proyecto Andino de Tecnología Campesina, Lima, 1994).

    Google Scholar 

  6. Mishkin,B. Cosmological ideas among the Indians of the southern Andes. J. Am. Folklore 53, 225–241 (1940).

    Article  Google Scholar 

  7. Morote Best,E. La fiesta de San Juan, el Bautista. Arch. Peruanos Folklore 1, 160–200 (1953).

    Google Scholar 

  8. Orlove,B. S. Two rituals and three hypotheses: an examination of solstice divination in southern highland Peru. Anthropol. Quart. 52, 86–98 (1979).

    Article  Google Scholar 

  9. Lira,J. A. Farmacopea Tradicional Indígena y Prácticas Rituales (El Condor, Lima, 1946).

    Google Scholar 

  10. Camino,A., Recharte,J. & Bidegaray,P. La Tecnología en el Mundo Andino. Runakunap Kawsayninkupaq Rurasqankunaqa Vol. 1 (eds Lechtman, H. & Soldi, A. M.) 261–281 (Universidad Nacional Autónoma de México, Mexico City, 1981).

    Google Scholar 

  11. Goland,C. Cultivating Diversity: Field Scattering as Agricultural Risk Management in Cuyo Cuyo, Dept. of Puno, Peru (Working Paper No. 4, Research Project on Production, Storage and Exchange in a Terraced Environment on the Eastern Andean Escarpment, Department of Anthropology, Univ. North Carolina, Chapel Hill, 1992).

    Google Scholar 

  12. Kolata,A. Valley of the Spirits: A Journey into the Lost Realm of the Aymara (Wiley, New York, 1996).

    Google Scholar 

  13. Carter,W. E. & Mamani,M. Irpa Chico: Individuo y Comunidad en la Cultura Aymara (Juventud, La Paz, 1982).

    Google Scholar 

  14. Mamani,M. in Raíces de América: el Mundo Aymara (ed. Albó, X.) 75–131 (Alianza, Madrid, 1988).

    Google Scholar 

  15. Yampara Huarachi,S. in La Cosmovisión Aymara (eds van den Berg, H. & Schiffers, N.) 143–186 (UCB/HISBOL, La Paz, 1992).

    Google Scholar 

  16. Kraft,K. E. Andean Fields and Fallow Pastures: Communal Land Use Management under Pressures for Intensification. Thesis, Univ. Florida (1995).

    Google Scholar 

  17. Beukema,H. P. & van de Zaag,D. E. Introduction to Potato Production (Pudoc, Wageningen, 1990).

    Google Scholar 

  18. MacKerron,D. K. L. & Jeffries,R. A. The distribution of tuber sizes in droughted and irrigated crops of potato. I. Observations on the effect of water stress on graded yields from differing cultivars. Potato Res. 31, 269–278 (1988).

    Article  Google Scholar 

  19. Bauer,B. S. & Dearborn,D. S. P. Astronomy and Empire in the Ancient Andes: The Cultural Origins of Inca Sky Watching. (Univ. Texas Press, Austin, 1995).

    Google Scholar 

  20. de Arriaga,P. J. The Extirpation of Idolatry in Peru (Univ. Kentucky Press, Lexington, 1968 [1621]).

    Google Scholar 

  21. Anonymous Jesuit priest Misión de las provincias de los Huachos y Yauyos. Rev. Histórica (Lima) 6, 180–197 (1919).

    Google Scholar 

  22. de Santillán,F., Valera,B. & Pachacuti,J. de S. C. Tres Relaciones de Antigüedades Peruanas (Guaranía, Asunción, 1950).

    Google Scholar 

  23. Rossow,W. B. & Schiffer,R. A. ISCCP cloud data products. Bull. Am. Meteorol. Soc. 72, 2–20 (1991).

    Article  ADS  Google Scholar 

  24. Kent,G. S. et al. Surface temperature related variations in tropical cirrus cloud as measured by SAGE II. J. Clim. 8, 2577–2594 (1995).

    Article  ADS  Google Scholar 

  25. Liao,X., Rossow,W. B. & Rind,D. Comparison between SAGE II and ISCCP high-level clouds 1. Global and zonal mean cloud amounts. J. Geophys. Res. 100, 1121–1135 (1995).

    Article  ADS  Google Scholar 

  26. Kalnay,E. et al. The NCEP/NCAR 40 year reanalysis project. Bull. Am. Meteorol. Soc. 77, 437–471 (1996).

    Article  ADS  Google Scholar 

  27. Schaefer,B. E. Astronomy and the limits of vision. Vistas Astron. 36, 311–361 (1993).

    Article  ADS  Google Scholar 

  28. Thompson,L. G., Mosley-Thompson,E. & Arnao,B. J. El Niño-Southern Oscillation events recorded in the stratigraphy of the tropical Quelccaya ice cap, Peru. Science 226, 50–53 (1984).

    Article  ADS  CAS  Google Scholar 

  29. Aceituno,P. On the functioning of the Southern Oscillation in the South American sector. Part I: Surface climate. Mon. Weath. Rev. 116, 505–524 (1988).

    Article  ADS  Google Scholar 

  30. Frisancho,A. R. et al. Developmental, genetic and environmental components of aerobic capacity at high altitude. Am. J. Phys. Anthropol. 96, 431–442 (1995).

    Article  CAS  Google Scholar 

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Acknowledgements

We thank G. Urton for insights into Andean ethnoastronomy, G. Rasmussen for discussions on visibility and cirrus cloud, G. Scott for providing potato yield data for Puno department, Peru, and R. Bishop, K. Cook, D. Dearborn, D. Helfand, A. Kaplan, G. Kiladis, J. Lenters, M. Sarazin and B. Schafer for comments. M.A.C. thanks B. D'Achille for first making him aware of the Andean forecasting scheme.

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Correspondence to Benjamin S. Orlove.

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Orlove, B., Chiang, J. & Cane, M. Forecasting Andean rainfall and crop yield from the influence of El Niño on Pleiades visibility. Nature 403, 68–71 (2000). https://doi.org/10.1038/47456

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