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13-17 May 2013
Tucson, Arizona
US/Arizona timezone
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Streamflow variability in the Chilean Mediterranean-temperate climate transition (35°S-42°S) during the last four hundred years inferred from tree-rings records

Presented by Dr. Ariel MUñOZ on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Board #: 57

Content

We developed a streamflow reconstruction of the Biobío River, located on the limit of influence of Mediterranean and wet-temperate climate. We compared it with previous reconstructions from the Temperate (Puelo-River) and Mediterranean (Maule-River) climates. The present trend of reduced flow in both Biobío and Puelo Rivers seems to be part of a low frequency cycle (>80 years) shared by these rivers. Flows of both of these rivers showed a high correlation with the Antarctic Oscillation. Extreme events for all three rivers showed an increase during the 19th and 20th centuries. Both the most extreme drought and pluvial years in the instrumental record (1943-2000) were found within the five most extreme years in the common period of the last 400-years displayed by the reconstructions. We conclude that the Biobío reconstructions, allow for greater understanding of the differences in the regime of these rivers, identifying interannual and multi-decadal patterns.

Place

Location: DoubleTree
Room: Salon E

Primary authors

  • Dr. Ariel MUñOZ Laboratorio de Dendrocronología y Cambio Global, Universidad Austral de Chile.
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Co-authors

  • Dr. Antonio LARA Laboratorio de Dendrocronología y Cambio Global, Universidad Austral de Chile.
  • Dr. David SAUCHYN Prairie Adaptation Research Collaborative (PARC), University of Regina
  • Dr. Duncan CHRISTIE Laboratorio de Dendrocronología y Cambio Global, Universidad Austral de Chile, Chile
  • Dr. Rocío URRUTIA Laboratorio de Dendrocronología y Cambio Global, Universidad Austral de Chile
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