This document covers how to 1) create station composite analysis spreadsheets
for various data types (i.e., MeanT, Precip, etc.), 2) compute historical station
composites analyses based on El Niño/La Niña, 3) apply risk analysis
techniques, and 4) produce a current composite analysis forecast based on El
Niño/La Niña.
This exercise uses Microsoft Excel as the platform for analysis. Excel is used for
training purposes to provide a more detailed explanation of the process and
methodology employed. The statistical software SPLUS will be utilized
operationally and for developmental composite analysis at the local office.
Although SPLUS streamlines the process through a graphical user interface for
data input and statistical analyses, the methodology will not be evident to the
user. It is important to develop skill in the composite analysis methodology
through Excel first.