Specification and estimation of the transfer function in dendroclimatological reconstructions

Maximilian Auffhammer, Bo Li, Brian Wright, Seung Jick Yoo

Research output: Contribution to journalArticle

Abstract

We identify two issues with the reverse regression approach as implemented in several classic reconstructions of past climate fluctuations from dendroclimatologcical data series. First, instead of estimating the causal relationship between the proxy, which is measured with significant error, as function of climate and formally inverting the relationship, most papers estimate the inverted relationship directly. This leads to biased coefficients and reconstructions with artificially low variance. Second, we show that inversion of the relationship is often done incorrectly when the underlying causal relationship is dynamic in nature. We show analytically as well as using Monte Carlo experiments and actual tree ring data, that the reverse regression method results in biased coefficients, reconstructions with artificially low variance and overly smooth reconstructions. We further demonstrate that correct application of the inverse regression method is preferred. However, if the measurement error in the tree ring index is significant, neither method provides reliable reconstructions.

Original languageEnglish (US)
Pages (from-to)105-126
Number of pages22
JournalEnvironmental and Ecological Statistics
Volume22
Issue number1
DOIs
StatePublished - Jan 1 2015

Keywords

  • Climate change
  • Climate variability
  • Inversion
  • Paleoclimatic data
  • Reconstruction method

ASJC Scopus subject areas

  • Statistics and Probability
  • Environmental Science(all)
  • Statistics, Probability and Uncertainty

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