https://link.springer.com/article/10.1007/s10584-023-03671-5
Authors. Merk, C. & Wagner, G
Venue. Climatic Change
How the Institute flags it
frontier 1 time established 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.