Douglas, P. M. J., Pagani, M., Canuto, M. A., Brenner, M., Hodell, D. A., Eglinton, T. I. and Curtis, J. H.: Drought, agricultural adaptation, and sociopolitical collapse in the Maya Lowlands, Proceedings of the National Academy of Sciences, 112(18), 5607–5612, doi:10.1073/pnas.1419133112, 2015.

year (MATc00c25333f): The paleoData_values have changed

Column 'addRbM6tWbvbSJndxFzJ', with variable name 'age.rangeHigh', was added to the dataset
Column 'addRFdsr7pTmnlOXlzu4', with variable name 'depth', was added to the dataset
Column 'addRgvDkh4lbE7COWl13', with variable name 'age', was added to the dataset
Column 'addRHFZmCH07ATicF9CY', with variable name 'depth', was added to the dataset
Column 'addRpN7Y8chUx6oujnRl', with variable name 'ageEnsemble', was added to the dataset
Column 'addRrD1juKocrcRymQrw', with variable name 'age.rangeLow', was added to the dataset
Column 'LS15DOSA-chron-NA1', with variable name 'depth', was added to the dataset
Column 'LS15DOSA-chron-NA2', with variable name 'age.rangeLow', was added to the dataset
Column 'LS15DOSA-chron-NA3', with variable name 'age.rangeHigh', was added to the dataset
Column 'LS15DOSA-chron-NA4', with variable name 'age', was added to the dataset

no IntegrationTime given, but units/type are given. please clarify-BK

Modern lake isotoep hydrology and mineralogy change downcore

The carbonate isotope values also show an up core trend to more positive values with a particularly marked step in d13C values at 125 cm from ~-3 per mil to ~+2 per mil, in part explained by the shift in mineralogy; aragonite is 1.9 per mil (0.6 per mil) more positive in d13C (d18O) compared with calcite precipitated in waters with the same temperature and isotopic composition (Grossman, 1984; Grossman and Ku, 1986). Oxygen and hydrogen isotope ratios of the lake waters collected in 2007 show a clear evaporative signal (Supplementary Figure 1, available online), and d18O trends to more positive values likely represents a shift to more evaporative dominant conditions given the associated change from calcite to aragonite (e.g. Jones et al., 2006).