GLOSSARY

This glossary provides definitions of important terms used in the descriptions of ISciences' capabilities and products.

Integration Period indicates the number of months being compared to historical data.  For example, a composite index map for June through August (3-month integration period) compares those three months to the same three month period in each year from 1950 through 2009. Longer integration periods show longer-term trends, and tend to be less noisy than shorter periods.

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Many analyses reported in ISciences-authored blog posts are based on data generated by the ISciences Water Security Indicator Model (WSIM). Other sources, if used, are referenced in footnotes accompanying individual posts. WSIM is a validated capability that produces monthly reports on current and forecast global freshwater surpluses and deficits with lead times of 1-9 months at 0.25°x0.25° resolution. This capability has been in continuous operation since April 2011 and has proven to provide reliable forecasts of emerging water security concerns in that time-frame. WSIM has the ability to assess the impacts of water anomalies on people, agriculture, and electricity generation. Detailed data, customized visualizations, and reports are available for purchase.

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