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Now showing items 1-10 of 19
A 400-year Tree-ring Chronology from the Tropical Treeline of North America
High-elevation sites in the tropics may be particularly sensitive to rapid climate change. By sampling treeline populations, I have developed the first extensive (> 300 years) tree-ring chronology in tropical North America. ...
Inequality in Paleorecords
Paleorecords provide information on past environmental variability, and help define ecological reference conditions by means of changes in their characteristics (accumulation rate, geochemical composition, density, etc.). ...
Daily Weather and Tree Growth at the Tropical Treeline of North America
We present here the 2001?2004 results of observational field studies aimed at quantifying tropical timberline climate and radial increment of Pinus hartwegii Lindl. trees on Nevado de Colima, in the middle of the North ...
Are Climate-Tree Growth Relationships Changing in North-Central Idaho, U.S.A.?
An 861-yr Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) tree-ring chronology has been recently developed for the Salmon River Valley, Challis National Forest, Idaho. Its potential for climatic reconstruction is ...
North Pacific Decadal Climate Variability since 1661
Climate in the North Pacific and North American sectors has experienced interdecadal shifts during the twentieth century. A network of recently developed tree-ring chronologies for Southern and Baja California extends the ...
The oldest dated tree of Europe livesin the wild Pollino massif:Italus,astrip-bark Heldreich?s pine
How long do the oldest trees in Europe live? And wheredo they live? Recently, Konter et al. (2017) documented thediscovery in Greece of Adonis, aPinus heldreichiiH.Christwith at least 1,075 tree rings, thus the oldest tree ...
Stochastic modeling of regime shifts
Probabilistic methods for modeling the distribution of regimes and their shifts over time are developed by drawing on statistical decision and limit theory of random sums. Multi-annual episodes of opposite sign are graphically ...
Hierarchical modeling of space-time dendroclimatic fields: Comparing a frequentist and a Bayesian approach
Environmental processes, including climatic impacts in cold regions, are typically acting at multiple spatial and temporal scales. Hierarchical models are a flexible statistical tool that allows for decomposing spatiotemporal ...