Tree-ring radiocarbon jump between the 1052 and 1053 rings (English oak STK-C10)
From the PANGAEA data behind Brehm et al. 2021, computed ring by ring: 1049 -9.0, 1050 -7.5, 1051 -8.6, 1052 -10.6, 1053 -4.8, 1054 -3.6, 1055 -2.9, 1056 -4.9, 1057 -8.0 permil (errors about 1.1 to 1.7). The jump is 5.8 permil between the 1052 ring and the 1053 ring, matching the paper's 5.9 plus or minus 1.1. This is the only tree in that dataset covering these years. A particle event in December 1052 would put its carbon-14 into the 1053 growing season, exactly where this step sits. The signal is small and unconfirmed by beryllium-10 or chlorine-36.
How it connects
This clue from nature supports this hunch
The 1052 white vapour matches the 1052 radiocarbon candidate
This clue from nature is a clue for
1052 carbon-14 candidate
This clue from nature we read it in
Brehm et al. 2021, Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings, Nature Geoscience
This clue from nature we read it in
Miyake events: a review of the state of the art (2024)
This clue from nature we read it in
Brehm et al. 2020, Radiocarbon measurements on tree rings 969 to 1933 AD, PANGAEA dataset (the raw numbers behind the 2021 paper)