Growth/climate response shift in a long subalpine spruce chronology

Ulf Büntgen, David C. Frank, Martin Schmidhalter, Burkhard Neuwirth, Mathias Seifert, Jan Esper

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

A new Norway spruce (Picea abies (L.) Karst.) tree-ring width chronology based on living and historic wood spanning the AD 1108-2003 period is developed. This composite record combines 208 high elevation samples from 3 Swiss subalpine valleys, i.e., Lötschental, Goms, and Engadine. To retain potential high- to low-frequency information in this dataset, individual spline detrending and the regional curve standardization are applied. For comparison, 22 high elevation and 6 low-elevation instrumental station records covering the greater Alpine area are used. Previous year August-September precipitation and current year May-July temperatures control spruce ring width back to ∼1930. Decreasing (increasing) moving correlations with monthly mean temperatures (precipitation) indicate instable growth/climate response during the 1760-2002 period. Crucial June-August temperatures before ∼1900 shift towards May-July temperature plus August precipitation sensitivity after ∼1900. Numerous of comparable subalpine spruce chronologies confirm increased late-summer drought stress, coincidently with the recent warming trend. Comparison with regional-, and large-scale millennial-long temperature reconstructions reveal significant similarities prior to ∼1900 (1300-1900 mean r=0.51); however, this study does not fully capture the commonly reported 20th century wanning (1900-1980 mean r=-0.17). Due to instable growth/climate response of the new spruce chronology, further dendroclimatic reconstruction is not performed.

Original languageEnglish (US)
Pages (from-to)99-110
Number of pages12
JournalTrees - Structure and Function
Volume20
Issue number1
DOIs
StatePublished - Jan 2006
Externally publishedYes

Keywords

  • Alps
  • Dendroclimatology
  • Growth/climate response
  • High-low frequency
  • Standardization

ASJC Scopus subject areas

  • Forestry
  • Physiology
  • Ecology
  • Plant Science

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