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13-17 May 2013
Tucson, Arizona
US/Arizona timezone
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Climate influences on radial growth of Nothofagus pumilio near treeline on Choshuenco Volcano, Northern Patagonia, Chile

Presented by Mr. Claudio ALVAREZ on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Board #: 54

Content

Given the expected sensitivity of radial growth of trees near altitudinal treeline to global warming, we examined recent variability in growth of Nothofagus pumilio in monospecific stands near altitudinal treeline on Choshuenco Volcano (40oS latitude) in Chile. Preliminary results based on a chronology of 99 tree-ring series for the period from 1768 to 2010 yielded a mean series intercorrelation of 0.480. Focusing on the period after 1877 when the sample size exceeds 40 series, we produced standard and residual chronologies for analysis of relationships with local instrumental climate records as well as broad-scale climate drivers such as the Southern Annular Mode. Preliminary results show a sharp but short-lived decline in tree growth from 1960 to 1970 and a second long-lasting decline after approximately 1981 which are consistent with the positive trend in SAM during these time periods.

Place

Location: DoubleTree
Room: Salon E

Primary authors

  • Mr. Claudio ALVAREZ Biogeography Lab University of Colorado Boulder
  • Dr. Thomas VEBLEN Biogeography Lab University of Colorado Boulder
  • Dr. Duncan CHRISTIE Laboratorio Dendrocronologia y Cambio Global Universidad Austral de Chile
  • Mr. Alvaro GONZALEZ-REYES Laboratorio de Dendrocronologia y Cambio Global Universidad Austral de Chile, Departamento de Geología, Facultad de Ciencias físicas y Matemáticas, Universidad de Chile
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