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High elevation dendrochronology in Guatemala
Presented by Dr. Kevin ANCHUKAITIS on 17 May 2013 from 09:10 to 09:30
Type: Oral Presentation
Session: Tropical Dendrochronology
Track: Tropical dendrochronology
Central America sits at the center of a virtual crosshairs of predicted declines in precipitation due to anthropogenic climate change. Understanding patterns of past, present, and future rainfall variability in the region is not simply a question of climatology, but of the potential human consequences of climate change. Here, we demonstrate crossdating and identify a climate signal in high-elevation populations of Abies guatemalensis and Pinus hartwegii in Guatemala. Both species reflect precipitation in boreal winter and spring, and can therefore be used to reconstruct and characterize the intensity of the annual dry season. Our reconstruction reveals the importance of interannual and decadal precipitation variability, but doesn't suggest that recent trends in rainfall are exceptional in the context of the last 3 centuries. We compare our reconstruction to climate model simulations for the region, and we also describe recent findings from other species and additional sites along Guatemala's 'Dry Corridor'.
Room: Salon B