Text and Data Mining valid from 2018-06-25
Received: 1 December 2017
Accepted: 30 April 2018
First Online: 25 June 2018
Change Date: 18 July 2018
Change Type: Correction
Change Details: In the version of this Review Article originally published, ref. 10 was mistakenly cited instead of ref. 107 at the end of the sentence: “This complexity of residual ice cover makes it likely that HTM warming was regional, rather than global, and its peak warmth thus had different timing in different locations.” In addition, for ref. 108, Scientific Reports was incorrectly given as the publication name; it should have been Scientific Data. These errors have now been corrected in the online versions.
: The authors declare no competing interests.