Higher stalagmite d18O is lower rainfall amount

Uncertainty are just incremental integers in original document, which may be in error

Medina-Elizalde, M., Burns, S. J., Lea, D. W., Asmerom, Y., von Gunten, L., Polyak, V., Vuille, M. and Karmalkar, A.: High resolution stalagmite climate record from the Yucatan Peninsula spanning the Maya terminal classic period, Earth and Planetary Science Letters, 298(1-2), 255–262, doi:10.1016/j.epsl.2010.08.016, 2010.

d18O (SP10MEMX01A): interpretation3_scope: '' has been replaced by 'isotope'
d18O (SP10MEMX01A): interpretation4_scope: '' has been replaced by 'isotope'

on-line, automated carbonate preparation system linked to a triple collector gas source mass spectrometer at the University of Innsbruck.

precision better than 0.08% (Spotl & Vennemann 2003).

Three Hendy tests were carried out, i.e. at 10mm (AD 70), 20mm (837 BC) and 33mm (1453 BC), based on 7, 7 and 5 samples, respectively. The variations of d18O along individual growth layers, expressed in I”d18O, are 0.31, 0.74 and 0.18%, respectively. The correlation between oxygen and carbon in one of the three layers, at 200 mm, is high, R=0.9 (P<0.01) indicating that kinetic effects may have occurred. The other two test did not show fractionation.

this relationship is supported by the observed similarities with both regional and hemispheric temperature reconstructions available for the past 500 and 2000 years, respectively

During cold climate periods, relatively less winter contribution to the cave drip water will result in relatively higher d18O values and vice versa.  Depleted/enriched oxygen isotopesisotopes are interpreted mainly to indicate relatively more/less winter precipitation and higher/lower summer evaporation reflecting warmer/colder conditions.

Three Hendy tests were carried out, i.e. at 10mm (AD 70), 20mm (837 BC) and 33mm (1453 BC), based on 7, 7 and 5 samples, respectively. The variations of d18O along individual growth layers, expressed in Δd18O, are 0.31, 0.74 and 0.18%, respectively. The correlation between oxygen and carbon in one of the three layers, at 200 mm, is high, R=0.9 (P<0.01) indicating that kinetic effects may have occurred. The other two test did not show fractionation.