Comment on The Younger Dryas impact hypothesis: A review of the evidence, by Martin B. Sweatman (2021), Earth-Science Reviews 218, 103677

In his review of the Younger Dryas Impact Hypothesis (YDIH), Sweatman's (2021) critiques our simulation-based evaluation of the YDIH radiocarbon record (Jorgeson et al., 2020). He states that we compare dispersion in the radiocarbon datasets associated with the YDIH and the Laacher See volcanic eruption, that we do not account for old wood effects larger than 100 years, and that we do not account for recently published radiocarbon dates from Lake Hind. The first two critiques are incorrect, and we demonstrate that the third has an inconsequential effect on results.

Automated summary

Sweatman critiqued the evaluation of the YDIH and raised three points, but we proved that two of them were incorrect, and the third point had little effect on the results.