Comparison of two approaches for determining fire dates from tree scars ( ponderosa pine Pinus ponderosa) .

M. H. Madany, T. W. Swetnam, N. E. West

Research output: Contribution to journalArticle

37 Scopus citations


Occurrence of missing or false rings presents an obstacle to accurate dating of individual fires. Two different techniques of dating partial cross sections of fire-scarred ponderosa pine Pinus ponderosa were compared using the same samples. Method I involves the tabulation of 'raw' dates followed by a subsequent adjustment based on synchronization with fire dates from adjacent trees. Method II uses correlations with master chronologies based on analysis of increment cores taken in the same region as the sampled fire scar sections. Method I is prone to error since the assumption that fire dates differing by a few years may actually be from the same year cannot be independently verified. Method II provides a higher degree of certainty with regard to the accuracy of individual dates because the cross dating of local patterns of ring widths circumvents the problem of absent or false rings. -from Authors

Original languageEnglish (US)
Pages (from-to)856-861
Number of pages6
JournalForest Science
Issue number4
StatePublished - Jan 1 1982


ASJC Scopus subject areas

  • Forestry
  • Ecology
  • Ecological Modeling

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