ENSO (El Nino-Southern Oscillation) aggregative indicator and runoff prediction method thereof
A comprehensive index and standard technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to give real evaluations
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[0027] The present invention will be further described below in conjunction with specific examples.
[0028] A composite ENSO index and its runoff prediction method, re-studied and divided the multivariate ENSO (MEI). Taking ±0.5 as the standard value, the frequency of positive MEI≥0.5 is about 30.94%, the frequency of negative MEI≤-0.5 is 29.01%, and the remaining 40.05% is the frequency of normal years.
[0029] The intensity and duration of any ENSO event vary greatly. We defined five characteristic values, including extreme value, mean value and duration of months, to describe each event. With ±0.5 as the critical value, extract each El that reaches ±0.5 for 5 consecutive times / La process to calculate the extreme maximum MEI value (MEI max ), average MEI value (MEI mean ), the number of months after reaching the standard (MEI month ), Spatial Expansion (MEI spa ) and extreme anomaly area expansion (MEI exspa ). Combining these five characteristic parameters with...
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