Standard Article

Spectrum Analysis

Stochastic Modeling and Environmental Change

  1. Igor G. Zurbenko,
  2. P. Steven Porter

Published Online: 15 SEP 2006

DOI: 10.1002/9780470057339.vas050

Encyclopedia of Environmetrics

Encyclopedia of Environmetrics

How to Cite

Zurbenko, I. G. and Porter, P. S. 2006. Spectrum Analysis. Encyclopedia of Environmetrics. 5.

Author Information

  1. University at Albany, NY, USA

Publication History

  1. Published Online: 15 SEP 2006


Time series of environmental quality measurements often display periodic or quasi-periodic behavior on a wide range of time scales. A clearer understanding of the forces behind these processes may be available through spectral analysis, a transformation of variation in time into variation as a function of frequency or period. This article is intended to introduce an applied scientist to spectral analysis. Spectral analysis of stationary time series is briefly described, and avenues for the exploration of nonstationary time series, which represent the vast majority of time series encountered in practice, are suggested.