[See here for a news article from December previewing Melott’s March publication.]
I’m still unpacking these two brand new papers from Adrian Melott and A.E. Carlson comparing the atmospheric signals of the Tunguska Event and the start of the Younger Dryas, but they appear relatively positive from standpoint of the YDB impact hypothesis.
The Melott paper is protected, so I can only share the abstract, and have not yet paid for the full version. But the Carlson paper, which seems to be the subordinate study, is freely available and I have Scrbd it below.
More later…I am on my way to Disney World with the wife and kids!