1. Department of Ecology and Evolutionary Biology University of Arizona Bioscience West Tucson AZ USA
2. Laboratory of Tree‐Ring Research University of Arizona Tucson AZ USA
3. Dendroclimatology Swiss Federal Research Institute WSL Birmensdorf Switzerland
4. W. Szafer Institute of Botany Polish Academy of Sciences Krakow Poland
5. Department of Ecology Montana State University Bozeman MT USA
6. Department of Biology Bryn Mawr College Bryn Mawr PA USA
7. Santa Fe Institute Santa Fe NM USA
8. Center for Environmental Studies Aspen CO USA