Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (RESPONSE RTG 2010)
Text and Data Mining valid from 2018-09-28
Received: 3 June 2018
Accepted: 17 September 2018
First Online: 28 September 2018
Compliance with ethical standards
: We declare that there are no conflicts of interest.
: All data will be uploaded to the international tree-ring database (ITRDB).