Drought variability in the Pacific Northwest from a 6,000-yr lake sediment record

Previous studies have shown it has a simple carbonate mineralogy (low-magnesium calcite,w0.26% Mg; J.M. Russell, unpubl. data; Bessems, 2007)

every 2cm in the upper 10cm and then every 4-6cm downcore

a negative excursion in the d18Ocarb profiles suggests reduced evaporative concentration of lake water. Although it is not straightforward to compare carbonate with water d18O values, d18O values are more similar to groundwater (c. 2&; K. Mills & J.M. Russell, unpubl. data), in contrast to current lake water values indicating net evaporation (values between A¾2 and A¾4&; K. Mills & J.M. Russell, unpubl. data).'

discussion in relation to other proxies for upper sediments

depth (MAT587c7733cf): interpretation4_scope: '' has been replaced by 'climate'
depth (MAT587c7733cf): interpretation5_scope: '' has been replaced by 'climate'
depth (MAT587c7733cf): interpretation6_scope: '' has been replaced by 'climate'
year (MAT5b1c65d758): interpretation4_scope: '' has been replaced by 'climate'
year (MAT5b1c65d758): interpretation5_scope: '' has been replaced by 'climate'
year (MAT5b1c65d758): interpretation6_scope: '' has been replaced by 'climate'

year (MAT5b1c65d758): The size of the paleoData_values have changed, from 44 to 44 entries.

d18O (LS11RYKA): paleoData_isPrimary: '' has been replaced by 'FALSE'
d18O (LS11RYKA): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
depth (MAT587c7733cf): paleoData_isPrimary: '' has been replaced by 'FALSE'
depth (MAT587c7733cf): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
year (MAT5b1c65d758): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (MAT5b1c65d758): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'

d18O (LS11RYKA): interpretation1_variable: 'I_E' has been replaced by 'hydrologicBalance'
d18O (LS11RYKA): interpretation2_variable: 'catchment disturbance' has been replaced by 'deleteMe'
d18O (LS11RYKA): interpretation3_variable: 'T_lake' has been replaced by 'temperature'