Comparison between spatio-temporal random processes and application to climate model data

Bo Li, Xianyang Zhang, Jason E. Smerdon

Research output: Contribution to journalArticle

Abstract

Comparing two spatio-temporal processes are often a desirable exercise. For example, assessments of the difference between various climate models may involve the comparisons of the synthetic climate random fields generated as simulations from each model. We develop rigorous methods to compare two spatio-temporal random processes both in terms of moments and in terms of temporal trend, using the functional data analysis approach. A highlight of our method is that we can compare the trend surfaces between two random processes, which are motivated by evaluating the skill of synthetic climate from climate models in terms of capturing the pronounced upward trend of real-observational data. We perform simulations to evaluate our methods and then apply the methods to compare different climate models as well as to evaluate the synthetic temperature fields from model simulations, with respect to observed temperature fields.

Original languageEnglish (US)
Pages (from-to)267-279
Number of pages13
JournalEnvironmetrics
Volume27
Issue number5
DOIs
StatePublished - Aug 1 2016

Keywords

  • comparing spatiotemporal processes
  • covariance operator
  • functional data analysis
  • mean surface
  • temporal trend

ASJC Scopus subject areas

  • Statistics and Probability
  • Ecological Modeling

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