ASE200, HP 6890 GC, Finnigan MAT Delta+ XL mass spectrometer
; archiveType changed - was originally Lake sediment (LS)
Complete replacement of the winter Indian monsoon source with a southeasterly/northwesterly source would deplete ?Dwax by about 35?, which is the amplitude of change observed between the mega- droughts interval and the Holocene. / "Relatively depleted ?Dwax values at Lake Malawi from ~3.1 ka to present likely reflect the modern hydrological controls on ?Dprecip, with source changes constituting a more limited role than the amount effect and overall intensity of the hydrological cycle. "
depends (orbital timescale: More Indian Monsoon moisture-->more enriched. Since 3ka: Indian source has been stable, so amount effect dominates: more rainfall, more intense hydrological cycle -->More depleted)
Leaf wax dD reflects "...variations in the ?D of precipitation (?Dprecip) through time in many systems (Hou et al., 2008; Huang et al., 2004). Observational data and isotope-enabled climate models indicate that ?Dprecip reflects the integrated atmospheric history of a water parcel, including source region, transport history, and convective, evaporative, and distillation processes." / "The Lake Malawi ?Dwax likely reflects the ?D of precipitation and associated changes in precipitation and vapor transport, not bio- synthetic or temperature effects."
Relatively depleted dDwax values at Lake Malawi from ~3.1 ka to present likely reflect the modern hydrological controls on dDprecip, with source changes constituting a more limited role than the amount effect and overall intensity of the hydrological cycle.
fraction of modern 14C activity uncertainty
stratigraphic tie to piston core dated by varve counting and 210Pb
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)
year (MAT15c72e1504): interpretation4_scope: '' has been replaced by 'climate'
depth (MAT3c131c959e): interpretation4_scope: '' has been replaced by 'climate'
d2H (LS11KOMA01A): paleoData_isPrimary: '' has been replaced by 'FALSE'
d2H (LS11KOMA01A): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
year (MAT15c72e1504): paleoData_isPrimary: '' has been replaced by 'TRUE'
year (MAT15c72e1504): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
depth (MAT3c131c959e): paleoData_isPrimary: '' has been replaced by 'FALSE'
depth (MAT3c131c959e): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
d2H (LS11KOMA01A): interpretation2_basis: 'Leaf wax dD reflects "...variations in the ?D of precipitation (?Dprecip) through time in many systems (Hou et al., 2008; Huang et al., 2004). Observational data and isotope-enabled climate models indicate that ?Dprecip reflects the integrated atmospheric history of a water parcel, including source region, transport history, and convective, evaporative, and distillation processes." / "The Lake Malawi ?Dwax likely reflects the ?D of precipitation and associated changes in precipitation and vapor transport, not bio- synthetic or temperature effects."' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_direction: 'positive' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_inferredMaterial: 'soil water' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_mathematicalRelation: 'linear' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_rank: '1' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_scope: 'isotope' has been replaced by 'climate'
d2H (LS11KOMA01A): interpretation2_seasonality: 'Annual' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_seasonalityOriginal: 'Annual' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_variable: 'precipitationIsotope' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_variableGroup: 'P_isotope' has been replaced by ''
d2H (LS11KOMA01A): interpretation2_variableGroupDirection: 'positive' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_basis: 'Relatively depleted dDwax values at Lake Malawi from ~3.1 ka to present likely reflect the modern hydrological controls on dDprecip, with source changes constituting a more limited role than the amount effect and overall intensity of the hydrological cycle.' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_direction: 'negative' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_inferredMaterial: 'soil water' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_rank: '2' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_scope: 'isotope' has been replaced by 'climate'
d2H (LS11KOMA01A): interpretation3_seasonality: 'Annual' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_seasonalityOriginal: 'Annual' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_variable: 'precipitation' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_variableGroup: 'EffectiveMoisture' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_variableGroupDirection: 'negative' has been replaced by ''
d2H (LS11KOMA01A): interpretation3_variableGroupOriginal: 'P_amount' has been replaced by ''
d2H (LS11KOMA01A): interpretation4_basis: '' has been replaced by 'Leaf wax dD reflects "...variations in the ?D of precipitation (?Dprecip) through time in many systems (Hou et al., 2008; Huang et al., 2004). Observational data and isotope-enabled climate models indicate that ?Dprecip reflects the integrated atmospheric history of a water parcel, including source region, transport history, and convective, evaporative, and distillation processes." / "The Lake Malawi ?Dwax likely reflects the ?D of precipitation and associated changes in precipitation and vapor transport, not bio- synthetic or temperature effects."'
d2H (LS11KOMA01A): interpretation4_direction: '' has been replaced by 'positive'
d2H (LS11KOMA01A): interpretation4_inferredMaterial: '' has been replaced by 'soil water'
d2H (LS11KOMA01A): interpretation4_mathematicalRelation: '' has been replaced by 'linear'
d2H (LS11KOMA01A): interpretation4_rank: '' has been replaced by '1'
d2H (LS11KOMA01A): interpretation4_scope: '' has been replaced by 'isotope'
d2H (LS11KOMA01A): interpretation4_seasonality: '' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation4_seasonalityOriginal: '' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation4_variable: '' has been replaced by 'precipitationIsotope'
d2H (LS11KOMA01A): interpretation4_variableGroup: '' has been replaced by 'P_isotope'
d2H (LS11KOMA01A): interpretation4_variableGroupDirection: '' has been replaced by 'positive'
d2H (LS11KOMA01A): interpretation5_basis: '' has been replaced by 'Relatively depleted dDwax values at Lake Malawi from ~3.1 ka to present likely reflect the modern hydrological controls on dDprecip, with source changes constituting a more limited role than the amount effect and overall intensity of the hydrological cycle.'
d2H (LS11KOMA01A): interpretation5_direction: '' has been replaced by 'negative'
d2H (LS11KOMA01A): interpretation5_inferredMaterial: '' has been replaced by 'soil water'
d2H (LS11KOMA01A): interpretation5_rank: '' has been replaced by '2'
d2H (LS11KOMA01A): interpretation5_scope: '' has been replaced by 'isotope'
d2H (LS11KOMA01A): interpretation5_seasonality: '' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation5_seasonalityOriginal: '' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation5_variable: '' has been replaced by 'precipitation'
d2H (LS11KOMA01A): interpretation5_variableGroup: '' has been replaced by 'EffectiveMoisture'
d2H (LS11KOMA01A): interpretation5_variableGroupDirection: '' has been replaced by 'negative'
d2H (LS11KOMA01A): interpretation5_variableGroupOriginal: '' has been replaced by 'P_amount'
d2H (LS11KOMA01A): interpretation6_scope: '' has been replaced by 'isotope'
year (MAT15c72e1504): interpretation1_scope: '' has been replaced by 'climate'
year (MAT15c72e1504): interpretation2_scope: '' has been replaced by 'climate'
year (MAT15c72e1504): interpretation3_scope: '' has been replaced by 'climate'
depth (MAT3c131c959e): interpretation1_scope: '' has been replaced by 'climate'
depth (MAT3c131c959e): interpretation2_scope: '' has been replaced by 'climate'
depth (MAT3c131c959e): interpretation3_scope: '' has been replaced by 'climate'
Updated lipdverse database entry with a changed file.
d2H (LS11KOMA01A): interpretation1_seasonality: 'DJF' has been replaced by 'Dec-Feb'
d2H (LS11KOMA01A): interpretation1_variable: 'Source and intensity' has been replaced by 'precipitationIsotope'
d2H (LS11KOMA01A): interpretation2_seasonality: 'annual' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation2_variable: 'P_isotope' has been replaced by 'precipitationIsotope'
d2H (LS11KOMA01A): interpretation3_seasonality: 'annual' has been replaced by 'Annual'
d2H (LS11KOMA01A): interpretation3_variable: 'P_amount' has been replaced by 'precipitation'
Column 'RkAJDUldOBROKb3nx', with variable name 'reject', was added to the dataset
Column 'LS11KOMA-chron-NA1', with variable name 'reject', was removed from the dataset
Changes made as part of LiPDverse vocabulary standardization process
d2H (LS11KOMA01A): paleoData_longName: '' has been replaced by 'AD'
year (MAT15c72e1504): paleoData_units: 'AD' has been replaced by 'yr AD'
year (MAT15c72e1504): paleoData_longName: '' has been replaced by 'AD'
depth (MAT3c131c959e): paleoData_longName: '' has been replaced by 'AD'
Konecky, Bronwen L. , Russell, James M. , Johnson, Thomas C. , Brown, Erik T. , Berke, Melissa A. , Werne, Josef P. , Huang, Yongsong
Konecky, B. L., Russell, J. M., Johnson, T. C., Brown, E. T., Berke, M. A., Werne, J. P. and Huang, Y.: Atmospheric circulation patterns during late Pleistocene climate changes at Lake Malawi, Africa, Earth and Planetary Science Letters, 312(3-4), 318–326, doi:10.1016/j.epsl.2011.10.020, 2011.
Atmospheric circulation patterns during late Pleistocene climate changes at Lake Malawi, Africa