Publication Abstracts

Phillips et al. 1998

Phillips, J.G., M.A. Cane, and C. Rosenzweig, 1998: ENSO, seasonal rainfall patterns and simulated maize yield variability in Zimbabwe. Agric. Forest Meteorol., 90, 39-50, doi:10.1016/S0168-1923(97)00095-6.

A correlation between ENSO (El Niño/Southern Oscillation) and rainfall in southern Africa has been recognized for at least a decade. This recognition has led to the expectation that ENSO-based climate predictions will have significant applications in agricultural management. This study is an analysis of the potential for using ENSO predictions to reduce risk in agricultural production associated with rainfall variability at the site level. Records of sea-surface temperatures in the equatorial Pacific during November, December and January were used to define El Niño, La Niña and neutral years. Climate data from four sites in four of the five agricultural zones (AEZ) in Zimbabwe were analyzed with respect to ENSO phases and used to drive a maize growth simulation model parameterized for soil conditions typical of each area, using two nitrogen fertilizer treatments and three planting dates. The four sites (Karoi, AEZ II; Gweru, AEZ III; Masvingo, AEZ IV; and Beitbridge, AEZ V) all showed a decrease in seasonal precipitation associated with the El Niño phase, compared to both neutral and La Niña years. At sites in zones II and III, within-season rainfall variability increased for both El Niño and La Niña years relative to neutral years. While average simulated maize yields were generally lowest in El Niño years, variability in rainfall pattern and standard deviation of yields at the site level was high within each ENSO phase, indicating that more precise seasonal climate prediction would be necessary for forecasts to be valuable in crop management decisions in Zimbabwe. However, simulation results point towards the relative importance of predicting favorable cropping seasons as opposed to poor ones with respect to better nitrogen management and yield improvement for the more marginal sites.

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BibTeX Citation

@article{ph02000x,
  author={Phillips, J. G. and Cane, M. A. and Rosenzweig, C.},
  title={ENSO, seasonal rainfall patterns and simulated maize yield variability in Zimbabwe},
  year={1998},
  journal={Agric. Forest Meteorol.},
  volume={90},
  pages={39--50},
  doi={10.1016/S0168-1923(97)00095-6},
}

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RIS Citation

TY  - JOUR
ID  - ph02000x
AU  - Phillips, J. G.
AU  - Cane, M. A.
AU  - Rosenzweig, C.
PY  - 1998
TI  - ENSO, seasonal rainfall patterns and simulated maize yield variability in Zimbabwe
JA  - Agric. Forest Meteorol.
VL  - 90
SP  - 39
EP  - 50
DO  - 10.1016/S0168-1923(97)00095-6
ER  -

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