VG Optima mass spectrometer with an Isocarb system
; archiveType changed - was originally Lake sediment (LS)
interpreting the data as a record of changing seasonality and/or isotopic composition (and therefore source) of precipitation, are therefore preferred
higher d18O values should correlate with lower water levels, as inferred from the diatoms, indicating periods of reduced precipitation. In fact, the opposite appears to be the case - these two indicators tend to have a slight positive correlation rather than a negative one.
fraction of modern 14C activity uncertainty
210Pb, 239+240Pu or 137Cs activity uncertainty
Y if supported 210Pb activity, N if unsupported 210Pb activity
model used to convert 210Pb activity to age (e.g., constant rate of supply)
years before 1950 (calibrated age, or ages that dont need calibration)
depth (MAT36a5d199c9): interpretation3_scope: '' has been replaced by 'climate'
depth (MAT36a5d199c9): interpretation4_scope: '' has been replaced by 'climate'
age (MAT9a198008cb): interpretation3_scope: '' has been replaced by 'climate'
age (MAT9a198008cb): interpretation4_scope: '' has been replaced by 'climate'
Updated lipdverse database entry with a changed file.
age (MAT9a198008cb): paleoData_units: 'yr AD' has been replaced by 'yr BP'
age (MAT9a198008cb): paleoData_variableName: 'year' has been replaced by 'age'
d18O (LS99LASI): paleoData_isPrimary: '' has been replaced by 'FALSE'
d18O (LS99LASI): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
depth (MAT36a5d199c9): paleoData_isPrimary: '' has been replaced by 'FALSE'
depth (MAT36a5d199c9): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
year (MAT9a198008cb): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (MAT9a198008cb): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
d18O (LS99LASI): interpretation1_basis: 'interpreting the data as a record of changing seasonality and/or isotopic composition (and therefore source) of precipitation, are therefore preferred' has been replaced by ''
d18O (LS99LASI): interpretation1_direction: 'positive' has been replaced by ''
d18O (LS99LASI): interpretation1_inferredMaterial: 'lake water' has been replaced by ''
d18O (LS99LASI): interpretation1_rank: '1' has been replaced by ''
d18O (LS99LASI): interpretation1_scope: 'isotope' has been replaced by 'climate'
d18O (LS99LASI): interpretation1_variable: 'precipitationIsotope' has been replaced by ''
d18O (LS99LASI): interpretation1_variableGroup: 'P_isotope' has been replaced by ''
d18O (LS99LASI): interpretation1_variableGroupDirection: 'positive' has been replaced by ''
d18O (LS99LASI): interpretation2_basis: 'higher d18O values should correlate with lower water levels, as inferred from the diatoms, indicating periods of reduced precipitation. In fact, the opposite appears to be the case - these two indicators tend to have a slight positive correlation rather than a negative one.' has been replaced by ''
d18O (LS99LASI): interpretation2_inferredMaterial: 'Lake water' has been replaced by ''
d18O (LS99LASI): interpretation2_rank: '2' has been replaced by ''
d18O (LS99LASI): interpretation2_scope: 'isotope' has been replaced by 'climate'
d18O (LS99LASI): interpretation2_variable: 'effectivePrecipitation' has been replaced by ''
d18O (LS99LASI): interpretation2_variableGroup: 'EffectiveMoisture' has been replaced by ''
d18O (LS99LASI): interpretation2_variableGroupDirection: 'negative' has been replaced by ''
d18O (LS99LASI): interpretation2_variableGroupOriginal: 'P_E' has been replaced by ''
d18O (LS99LASI): interpretation3_scope: '' has been replaced by 'climate'
d18O (LS99LASI): interpretation4_basis: '' has been replaced by 'interpreting the data as a record of changing seasonality and/or isotopic composition (and therefore source) of precipitation, are therefore preferred'
d18O (LS99LASI): interpretation4_direction: '' has been replaced by 'positive'
d18O (LS99LASI): interpretation4_inferredMaterial: '' has been replaced by 'lake water'
d18O (LS99LASI): interpretation4_rank: '' has been replaced by '1'
d18O (LS99LASI): interpretation4_scope: '' has been replaced by 'isotope'
d18O (LS99LASI): interpretation4_variable: '' has been replaced by 'precipitationIsotope'
d18O (LS99LASI): interpretation4_variableGroup: '' has been replaced by 'P_isotope'
d18O (LS99LASI): interpretation4_variableGroupDirection: '' has been replaced by 'positive'
d18O (LS99LASI): interpretation5_basis: '' has been replaced by 'higher d18O values should correlate with lower water levels, as inferred from the diatoms, indicating periods of reduced precipitation. In fact, the opposite appears to be the case - these two indicators tend to have a slight positive correlation rather than a negative one.'
d18O (LS99LASI): interpretation5_inferredMaterial: '' has been replaced by 'Lake water'
d18O (LS99LASI): interpretation5_rank: '' has been replaced by '2'
d18O (LS99LASI): interpretation5_scope: '' has been replaced by 'isotope'
d18O (LS99LASI): interpretation5_variable: '' has been replaced by 'effectivePrecipitation'
d18O (LS99LASI): interpretation5_variableGroup: '' has been replaced by 'EffectiveMoisture'
d18O (LS99LASI): interpretation5_variableGroupDirection: '' has been replaced by 'negative'
d18O (LS99LASI): interpretation5_variableGroupOriginal: '' has been replaced by 'P_E'
d18O (LS99LASI): interpretation6_scope: '' has been replaced by 'isotope'
depth (MAT36a5d199c9): interpretation1_scope: '' has been replaced by 'climate'
depth (MAT36a5d199c9): interpretation2_scope: '' has been replaced by 'climate'
year (MAT9a198008cb): interpretation1_scope: '' has been replaced by 'climate'
year (MAT9a198008cb): interpretation2_scope: '' has been replaced by 'climate'
d18O (LS99LASI): interpretation1_variable: 'P_isotope' has been replaced by 'precipitationIsotope'
d18O (LS99LASI): interpretation2_variable: 'P_E' has been replaced by 'effectivePrecipitation'
Column 'RzhXejyQLOZk0QP1h', with variable name 'reject', was added to the dataset
Column 'LS99LASI-chron-NA1', with variable name 'reject', was removed from the dataset
Changes made as part of LiPDverse vocabulary standardization process
d18O (LS99LASI): paleoData_longName: '' has been replaced by 'AD'
depth (MAT36a5d199c9): paleoData_longName: '' has been replaced by 'AD'
year (MAT9a198008cb): paleoData_units: 'AD' has been replaced by 'yr AD'
year (MAT9a198008cb): paleoData_longName: '' has been replaced by 'AD'
Lamb, Henry , Roberts, Neil , Leng, Melanie , Barker, Philip , Benkaddour, Abdelfattah , van der Kaars, Sander
Lamb, H., Roberts, N., Leng, M., Barker, P., Benkaddour, A. and van der Kaars, S.: Journal of Paleolimnology, 21(3), 325–343, doi:10.1023/a:1008099602205, 1999.