Southern Oscillation Index (SOI) at LDEO/IRI Climate Data Library
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资源简介：
The Southern Oscillation Index (SOI) is the difference between the standardized Tahiti Sea Level Pressure (SLP) and the standardized Darwin SLP measurements. The data was originally collected by NOAA/NCEP. The SOI runs from 1951 to present. An earlier standardized SOI runs from 1881 to present.
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