El Nino/Southern Oscillation
نویسنده
چکیده
Three previously published proxy records of El Nino/Southern Oscillation (ENSO) variability were compared: a documentary record from coastal South America; an ice-core record from the Quelccaya ice cap in Peru; and a tree-ring record record from arid site conifers in the southwestern United States. The records were calibrated with long ENSO instrument records, and all the proxy records showed significant levels of correspondence with the instrument records. In fact, the proxy records appear to capture roughly comparable amounts of ENSO variability as would instrument records from the same regions. The b 0 ice-core record showed some evidence of missing years, but after adjustment the correlation with the tree-ring record was reasonably consistent back to about A.D. 1630. This result provides additional verification of the two proxy records and also indicates that ENSO variability persisted relatively unchanged through main period of the Little Ice Age. The documentary record does not match the other two proxy records, particularly the tree-ring record, very well prior to the 20th century.
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Prediction Method of El Nino Southern Oscillation: ENSO by Means of Wavelet Based Data Compression with Appropriate Support Length of Base Function
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