1. Laboratory of Tree-Ring Research, The University of Arizona, Tucson, AZ 85721, USA
2. Nevada Paleo-Ecology Laboratory, University of Nevada, Reno, NV 89557, USA
3. Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
4. Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA
5. Gregor Mendel Institute of Molecular Plant Biology, 1030 Vienna, Austria
6. Uliana Timber Industry, São Paulo, Brazil