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Climatic response of the mexican mountain pine (Pinus hartwegii Lindl.) in northeastern and central Mexico
Presented by Dr. Jose VILLANUEVA-DIAZ on 14 May 2013 from 16:10 to 16:30
Type: Oral Presentation
Session: Network Analysis
Track: Tree-ring network analysis
A network of ten ring-width chronologies of Pinus hartwegii a treeline species was developed from conifer stands at the Eastern Sierra Madre (ESM) and the Trans-Mexican Volcanic Belt (TVB) in the Valley of Mexico where the species was present. The PCA grouped the chronologies into two main components, PC1 for TVB and PC2 for ESM chronologies. ENSO in its warm phase (El Niño) and cold phase (La Niña) had significant impacts in the chronology index values. The La Niña phase produced dry conditions for the northeastern region and wet conditions for the Valley of Mexico, whereas dry conditions dominated both regions during intense warm ENSO events. The ENSO dipole apparently divided by the Tropic of Cancer may have significant implications to understand the historical impact of this circulatory pattern in the hydroclimatic variability of Mexico for the last 600 years.