d18O (WEBd22ea8c1): interpretation1_seasonality: 'annual' has been replaced by 'Annual'
d18O (WEBd22ea8c1): interpretation1_variable: 'd18O' has been replaced by 'precipitationIsotope'
d18O (WEBd22ea8c1): interpretation2_seasonality: 'MJJA' has been replaced by 'May-Aug'
d18O (WEBd22ea8c1): interpretation2_variable: 'ET' has been replaced by 'evaporation'

year (WEBc5aa3c9e): paleoData_units: 'AD' has been replaced by 'yr AD'
year (WEBc5aa3c9e): paleoData_longName: '' has been replaced by 'AD'
d18O (WEBd22ea8c1): paleoData_longName: '' has been replaced by 'AD'

year (WEBc5aa3c9e): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (WEBc5aa3c9e): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
d18O (WEBd22ea8c1): paleoData_isPrimary: '' has been replaced by 'FALSE'
d18O (WEBd22ea8c1): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'

d18O (WEBd22ea8c1): interpretation1_seasonality: 'annual' has been replaced by 'Annual'
d18O (WEBd22ea8c1): interpretation1_variable: 'd18O' has been replaced by 'precipitationIsotope'
d18O (WEBd22ea8c1): interpretation2_seasonality: 'MJJA' has been replaced by 'May-Aug'
d18O (WEBd22ea8c1): interpretation2_variable: 'ET' has been replaced by 'evaporation'

d18O (WEBd22ea8c1): interpretation1_seasonality: 'annual' has been replaced by 'Annual'
d18O (WEBd22ea8c1): interpretation1_variable: 'd18O' has been replaced by 'precipitationIsotope'
d18O (WEBd22ea8c1): interpretation2_seasonality: 'MJJA' has been replaced by 'May-Aug'
d18O (WEBd22ea8c1): interpretation2_variable: 'ET' has been replaced by 'evaporation'

year (WEBc5aa3c9e): paleoData_units: 'AD' has been replaced by 'yr AD'
year (WEBc5aa3c9e): paleoData_longName: '' has been replaced by 'AD'
d18O (WEBd22ea8c1): paleoData_longName: '' has been replaced by 'AD'

Our interpretation of the temperature signal in the δ18O chronology is that higher temperatures stimulate evaporation of soil water, resulting in a preferential loss of lighter isotopes in soil water, which in turn is taken up by trees.
Warmer conditions enhance the evaporation of the soil water, which increases δ18O in the source water.