Unfortunately, neither of these cellulose-inferred lakewater d18O records extends to the present, which precludes direct linking with time series of modern lakewater d18O measurements
on-line continuous-flow isotope-ratio mass spectrometer at the University of Waterloo Environmental Isotope Laboratory
; archiveType changed - was originally Lake sediment (LS)
Sediment samples were washed in 10% HCl to eliminate biogenic and mineral carbonates, freeze-dried, and gently dry-sieved using a 500-mm mesh. The sieving step removes the larger organic fragments, which have a greater potential to be derived from in-washed terrestrial material, while concentrating the fine organic fraction, derived primarily from zooplankton faecal pellets that deliver aquatic organic matter directly to the sediments (Edwards 1993). The fine-grained fraction was then processed through additional steps to remove non-cellulose organic components and minerogenic matter, including solvent extraction, bleaching, alkaline hydrolysis, oxyhydroxide leaching, and sodium polytungstate density separation
Data from surface waters sampled in the area (Fig. 3B) reveal evaporative enrichment in some lakes consistent with the predicted LEL, whereas data from Lake Spa? ime are strictly constrained to the LMWL, with an average composition identical to that of local groundwater.
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)
Data from surface waters sampled in the area (Fig. 3B) reveal evaporative enrichment in some lakes consistent with the predicted LEL, whereas data from Lake Spa˚ ime are strictly constrained to the LMWL, with an average composition identical to that of local groundwater.
Chronology in Hammarlund, Dan, et al. "Palaeolimnological and sedimentary responses to Holocene forest retreat in the Scandes Mountains, west-central Sweden." The Holocene 14.6 (2004): 862-876.
cellulose d18O records are presented in Fig. 6 as inferred lakewater d18O values using a constant cellulose–water isotopic fractionation factor of 1.028
depth (MAT8a6af22eba): interpretation3_scope: '' has been replaced by 'climate'
year (MATb48b55d761): interpretation3_scope: '' has been replaced by 'climate'
d18O (LS10STSP): paleoData_isPrimary: '' has been replaced by 'FALSE'
d18O (LS10STSP): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
depth (MAT8a6af22eba): paleoData_isPrimary: '' has been replaced by 'FALSE'
depth (MAT8a6af22eba): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
year (MATb48b55d761): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (MATb48b55d761): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
d18O (LS10STSP): interpretation2_basis: 'Data from surface waters sampled in the area (Fig. 3B) reveal evaporative enrichment in some lakes consistent with the predicted LEL, whereas data from Lake Spa? ime are strictly constrained to the LMWL, with an average composition identical to that of local groundwater.' has been replaced by ''
d18O (LS10STSP): interpretation2_direction: 'positive' has been replaced by ''
d18O (LS10STSP): interpretation2_equilibriumEvidence: 'Unfortunately, neither of these cellulose-inferred lakewater d18O records extends to the present, which precludes direct linking with time series of modern lakewater d18O measurements' has been replaced by ''
d18O (LS10STSP): interpretation2_inferredMaterial: 'lake water' has been replaced by ''
d18O (LS10STSP): interpretation2_integrationTimeUnits: 'years' has been replaced by ''
d18O (LS10STSP): interpretation2_mathematicalRelation: 'linear' has been replaced by ''
d18O (LS10STSP): interpretation2_rank: '1' has been replaced by ''
d18O (LS10STSP): interpretation2_scope: 'isotope' has been replaced by 'climate'
d18O (LS10STSP): interpretation2_variable: 'precipitationIsotope' has been replaced by ''
d18O (LS10STSP): interpretation2_variableGroup: 'P_isotope' has been replaced by ''
d18O (LS10STSP): interpretation2_variableGroupDirection: 'positive' has been replaced by ''
d18O (LS10STSP): interpretation3_scope: '' has been replaced by 'climate'
d18O (LS10STSP): interpretation4_basis: '' has been replaced by 'Data from surface waters sampled in the area (Fig. 3B) reveal evaporative enrichment in some lakes consistent with the predicted LEL, whereas data from Lake Spa? ime are strictly constrained to the LMWL, with an average composition identical to that of local groundwater.'
d18O (LS10STSP): interpretation4_direction: '' has been replaced by 'positive'
d18O (LS10STSP): interpretation4_equilibriumEvidence: '' has been replaced by 'Unfortunately, neither of these cellulose-inferred lakewater d18O records extends to the present, which precludes direct linking with time series of modern lakewater d18O measurements'
d18O (LS10STSP): interpretation4_inferredMaterial: '' has been replaced by 'lake water'
d18O (LS10STSP): interpretation4_integrationTimeUnits: '' has been replaced by 'years'
d18O (LS10STSP): interpretation4_mathematicalRelation: '' has been replaced by 'linear'
d18O (LS10STSP): interpretation4_rank: '' has been replaced by '1'
d18O (LS10STSP): interpretation4_scope: '' has been replaced by 'isotope'
d18O (LS10STSP): interpretation4_variable: '' has been replaced by 'precipitationIsotope'
d18O (LS10STSP): interpretation4_variableGroup: '' has been replaced by 'P_isotope'
d18O (LS10STSP): interpretation4_variableGroupDirection: '' has been replaced by 'positive'
d18O (LS10STSP): interpretation5_scope: '' has been replaced by 'isotope'
d18O (LS10STSP): interpretation6_scope: '' has been replaced by 'isotope'
depth (MAT8a6af22eba): interpretation1_scope: '' has been replaced by 'climate'
depth (MAT8a6af22eba): interpretation2_scope: '' has been replaced by 'climate'
year (MATb48b55d761): interpretation1_scope: '' has been replaced by 'climate'
year (MATb48b55d761): interpretation2_scope: '' has been replaced by 'climate'
Updated lipdverse database entry with a changed file.
d18O (LS10STSP): interpretation1_variable: 'NAO index' has been replaced by 'circulationIndex'
d18O (LS10STSP): interpretation2_variable: 'P_isotope' has been replaced by 'precipitationIsotope'
Changes made as part of LiPDverse vocabulary standardization process
d18O (LS10STSP): paleoData_longName: '' has been replaced by 'AD'
depth (MAT8a6af22eba): paleoData_longName: '' has been replaced by 'AD'
year (MATb48b55d761): paleoData_units: 'AD' has been replaced by 'yr AD'
year (MATb48b55d761): paleoData_longName: '' has been replaced by 'AD'
St. Amour, Natalie A. , Hammarlund, Dan , Edwards, Thomas W.D. , Wolfe, BRENT B.
ST. AMOUR, N. A., HAMMARLUND, D., EDWARDS, T. W. D. and WOLFE, B. B.: New insights into Holocene atmospheric circulation dynamics in central Scandinavia inferred from oxygen-isotope records of lake-sediment cellulose, Boreas, 39(4), 770–782, doi:10.1111/j.1502-3885.2010.00169.x, 2010.
New insights into Holocene atmospheric circulation dynamics in central Scandinavia inferred from oxygen-isotope records of lake-sediment cellulose