1. School of Geography and Development University of Arizona Tucson AZ USA
2. Laboratory of Tree‐Ring Research University of Arizona Tucson AZ USA
3. Lamont‐Doherty Earth Observatory Palisades NY USA
4. Department of Geosciences University of Arizona Tucson AZ USA
5. NASA Goddard Institute for Space Studies New York NY USA
6. School of Earth and Environmental Sciences University of St Andrews St Andrews UK