Tree-ring and document summer temperatures for Europe, 5 degree grid
Used to test the seed-boom version of the hantavirus idea: a warm summer two years before an outbreak, relative to the summer before it, makes beech and oak trees produce a big seed crop, which feeds a rodent boom the following year. That is how modern Puumala hantavirus outbreaks in Europe work.
How it connects
This clue from nature supports this hunch
Sweating sickness followed seed-boom years, as modern European hantavirus does tested; no signal
This clue from nature is a clue for
English sweating sickness: what was it?
This clue from nature we read it in
European summer temperature reconstruction (EuroMed2k, Luterbacher et al. 2016), NOAA Paleoclimatology
This clue from nature came from this step
Tested both versions of the hantavirus idea outbreak by outbreak