bulk carbonate, chara sp. and calcitic encrustations precipitated on Chara sp., and calcitic opercula of Bithynia tentaculata
Xray diffraction analysis, carbonates in the bulk sediment samples used for isotopic analyses were identified as exclusively lowMg calcite. No other carbonate minerals were detected.
; archiveType changed - was originally Lake sediment (LS)
and most ofthe carbonate macro fossil samples were processed on a preparation line described by Buchardt (1977); less than 200um
The isotopic records from Lake Igelsj .on provide evidence ofsevera l rapid changes in net precipitation during the Holocene, the most extensive ofwhich occurred between 8300 and 8000 cal BP and around 4000 cal BP, respectively. These climatic shifts, which affected large parts of northern and central Europe, were probably related to large-scale rearrangements of atmospheric circulation patterns"For example, the widely recorded cooling shortly before 8000 cal BP, with inferred records of lowered growth-season temperatures distributed from northern Sweden to Switzerland (Snowball et al., 2002; Tinner and Lotter, 2001), seems to be associated with an increase in effective moisture of equally regional significance. This pattern suggests a southward displacement ofthe Polar Front across most of the North Atlantic region, giving rise to cooler summers and drastically altered cyclonic pathways, preferentially during winter seasons.
atmospheric circulation; Aleutian Low Strength/position
and our interpretations are based on a simplistic climate-hydrology model in which variations in groundwater generation within the lake catchment produce changes in On a hydrogen-/oxygen-isotope cross-plot (Fig. 6) all groundwater samples as well as lake-water samples from January,March, and April plot close to the global meteoric water line (Craig, 1961), whereas lake-water samples from May to July fall along a local evaporation line with a slope near 5 as expected for water bodies affected by evaporation (Craig and Gordon, 1965). These results suggest that the water body is affected by a well-developed evaporative isotopic enrichment in spite ofthe rather short residence time (ca 20 days or less) as estimated from catchment size and meteorological data. Surface run-off from the catchment and direct precipitation seems to have no major impact on the isotopic composition oflake water during the ice-free season; groundwater level and related adjustments of lake level and surface/volume ratio of the basin during the ice-free season
fraction of modern 14C activity uncertainty
plant macrofossils (see paper fro species)
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)
was this date used in the age modelpermil
depth (MAT31eb236b64): interpretation3_scope: '' has been replaced by 'climate'
year (MATceb7a76232): interpretation3_scope: '' has been replaced by 'climate'
d18O (LS03HAIG): paleoData_isPrimary: '' has been replaced by 'FALSE'
d18O (LS03HAIG): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
depth (MAT31eb236b64): paleoData_isPrimary: '' has been replaced by 'FALSE'
depth (MAT31eb236b64): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
year (MATceb7a76232): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (MATceb7a76232): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
d18O (LS03HAIG): interpretation2_basis: 'and our interpretations are based on a simplistic climate-hydrology model in which variations in groundwater generation within the lake catchment produce changes in On a hydrogen-/oxygen-isotope cross-plot (Fig. 6) all groundwater samples as well as lake-water samples from January,March, and April plot close to the global meteoric water line (Craig, 1961), whereas lake-water samples from May to July fall along a local evaporation line with a slope near 5 as expected for water bodies affected by evaporation (Craig and Gordon, 1965). These results suggest that the water body is affected by a well-developed evaporative isotopic enrichment in spite ofthe rather short residence time (ca 20 days or less) as estimated from catchment size and meteorological data. Surface run-off from the catchment and direct precipitation seems to have no major impact on the isotopic composition oflake water during the ice-free season; groundwater level and related adjustments of lake level and surface/volume ratio of the basin during the ice-free season' has been replaced by ''
d18O (LS03HAIG): interpretation2_direction: 'negative' has been replaced by ''
d18O (LS03HAIG): interpretation2_inferredMaterial: 'lake water' has been replaced by ''
d18O (LS03HAIG): interpretation2_rank: '1' has been replaced by ''
d18O (LS03HAIG): interpretation2_scope: 'isotope' has been replaced by 'climate'
d18O (LS03HAIG): interpretation2_seasonality: 'Jun-Aug' has been replaced by ''
d18O (LS03HAIG): interpretation2_seasonalityOriginal: 'summer' has been replaced by ''
d18O (LS03HAIG): interpretation2_variable: 'hydrologicBalance' has been replaced by ''
d18O (LS03HAIG): interpretation2_variableGroup: 'EffectiveMoisture' has been replaced by ''
d18O (LS03HAIG): interpretation2_variableGroupDirection: 'negative' has been replaced by ''
d18O (LS03HAIG): interpretation2_variableGroupOriginal: 'I_E' has been replaced by ''
d18O (LS03HAIG): interpretation3_scope: '' has been replaced by 'climate'
d18O (LS03HAIG): interpretation4_basis: '' has been replaced by 'and our interpretations are based on a simplistic climate-hydrology model in which variations in groundwater generation within the lake catchment produce changes in On a hydrogen-/oxygen-isotope cross-plot (Fig. 6) all groundwater samples as well as lake-water samples from January,March, and April plot close to the global meteoric water line (Craig, 1961), whereas lake-water samples from May to July fall along a local evaporation line with a slope near 5 as expected for water bodies affected by evaporation (Craig and Gordon, 1965). These results suggest that the water body is affected by a well-developed evaporative isotopic enrichment in spite ofthe rather short residence time (ca 20 days or less) as estimated from catchment size and meteorological data. Surface run-off from the catchment and direct precipitation seems to have no major impact on the isotopic composition oflake water during the ice-free season; groundwater level and related adjustments of lake level and surface/volume ratio of the basin during the ice-free season'
d18O (LS03HAIG): interpretation4_direction: '' has been replaced by 'negative'
d18O (LS03HAIG): interpretation4_inferredMaterial: '' has been replaced by 'lake water'
d18O (LS03HAIG): interpretation4_rank: '' has been replaced by '1'
d18O (LS03HAIG): interpretation4_scope: '' has been replaced by 'isotope'
d18O (LS03HAIG): interpretation4_seasonality: '' has been replaced by 'Jun-Aug'
d18O (LS03HAIG): interpretation4_seasonalityOriginal: '' has been replaced by 'summer'
d18O (LS03HAIG): interpretation4_variable: '' has been replaced by 'hydrologicBalance'
d18O (LS03HAIG): interpretation4_variableGroup: '' has been replaced by 'EffectiveMoisture'
d18O (LS03HAIG): interpretation4_variableGroupDirection: '' has been replaced by 'negative'
d18O (LS03HAIG): interpretation4_variableGroupOriginal: '' has been replaced by 'I_E'
d18O (LS03HAIG): interpretation5_scope: '' has been replaced by 'isotope'
d18O (LS03HAIG): interpretation6_scope: '' has been replaced by 'isotope'
depth (MAT31eb236b64): interpretation1_scope: '' has been replaced by 'climate'
depth (MAT31eb236b64): interpretation2_scope: '' has been replaced by 'climate'
year (MATceb7a76232): interpretation1_scope: '' has been replaced by 'climate'
year (MATceb7a76232): interpretation2_scope: '' has been replaced by 'climate'
Updated lipdverse database entry with a changed file.
d18O (LS03HAIG): interpretation1_variable: 'lake level; net precipitation' has been replaced by 'hydrologicBalance'
d18O (LS03HAIG): interpretation2_seasonality: 'JJA' has been replaced by 'Jun-Aug'
d18O (LS03HAIG): interpretation2_variable: 'I_E' has been replaced by 'hydrologicBalance'
Column 'R1CzJnSL93Shp1N1w', with variable name 'reject', was added to the dataset
Column 'LS03HAIG-chron-NA1', with variable name 'reject', was removed from the dataset
Changes made as part of LiPDverse vocabulary standardization process
d18O (LS03HAIG): paleoData_longName: '' has been replaced by 'AD'
depth (MAT31eb236b64): paleoData_longName: '' has been replaced by 'AD'
year (MATceb7a76232): paleoData_units: 'AD' has been replaced by 'yr AD'
year (MATceb7a76232): paleoData_longName: '' has been replaced by 'AD'
Hammarlund, D.: Rapid hydrological changes during the Holocene revealed by stable isotope records of lacustrine carbonates from Lake Igelsjoen, southern Sweden, Quaternary Science Reviews, 22(2-4), 353–370, doi:10.1016/s0277-3791(02)00091-4, 2003.
Rapid hydrological changes during the Holocene revealed by stable isotope records of lacustrine carbonates from Lake Igelsjdegreesn, southern Sweden