Clue from nature AD 850

Yok Balum and Cariaco: a drier era overall, but they disagree on which decades

scripts/maya_drought.py. Yok Balum d18O (higher = drier), 20-year means: dry in 780-799 and 840-859, wet in 880-919. Cariaco titanium (tuned to Yok Balum; lower = drier), z: 780-799 +0.01, 820-839 -0.13, 840-859 -0.95, 860-879 -0.73, 880-899 -0.62, 900-919 -0.30, then wet from 920 (+0.58, +1.41).

How it connects

This clue from nature argues against Each Maya city fell silent during a local dry spell no city-by-city alignment with dry spells

This clue from nature is a clue for Did drought bring down the Classic Maya cities (about 750 to 910)?

This clue from nature we read it in Kennett et al. 2012, Development and disintegration of Maya political systems in response to climate change, Science 338:788; Yok Balum YOK-I stalagmite and tuned Cariaco titanium, NOAA

This clue from nature came from this step Tested the Maya city shutdowns against two drought records