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L <- lipdR::readLipd("https://lipdverse.org/data/UK4f9szGTPsqYza9gZZ1/1_0_6/LS11KOMA.lpd")Report an issue (include datasetId and version)
In compilations: (only most recent versions are shown)
iso2k-1_1_2
archiveType: LakeSediment
originalDataUrl: this compilation
lipdVersion: 1.3
author: list(name = "Konecky, Bronwen L. , Russell, James M. , Johnson, Thomas C. , Brown, Erik T. , Berke, Melissa A. , Werne, Josef P. , Huang, Yongsong")
journal: Earth and Planetary Science Letters
volume: 312
pages: -8
title: Atmospheric circulation patterns during late Pleistocene climate changes at Lake Malawi, Africa
doi: 10.1016/j.epsl.2011.10.020
latitude: -10.0183
longitude: 34.1878
elevation: 477
siteName: Lake Malawi
TSid: MAT15c72e1504
variableName: year
units: yr AD
description: Year AD
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
TSid: MAT3c131c959e
variableName: depth
units: cm
description: depth
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
TSid: LS11KOMA01A
variableName: d2H
units: permil
description: terrestrial biomarker
basis: 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. "
direction: 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)
interpDirection: 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)
scope: climate
seasonality: Dec-Feb
seasonalityOriginal: SH summer
variable: precipitationIsotope
variableDetail: moisture
variableGroup: Source and intensity
scope: climate
scope: climate
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."
direction: positive
inferredMaterial: soil water
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Annual
seasonalityOriginal: Annual
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
coefficient: NA
fraction: NA
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.
direction: negative
inferredMaterial: soil water
rank: 2
scope: isotope
seasonality: Annual
seasonalityOriginal: Annual
variable: precipitation
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_amount
coefficient: NA
fraction: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
TSid: chron1
variableName: depth
units: cm
description: mid-point depth
TSid: chron2
variableName: age14C
units: yr14C BP
description: 14C years before 1950
TSid: chron3
variableName: SD
units: yr14C BP
description: 14C years uncertainty
TSid: chron4
variableName: fractionModern
description: fraction of modern 14C activity
TSid: chron5
variableName: fractionModernUncertainty
description: fraction of modern 14C activity uncertainty
TSid: chron6
variableName: delta13C
units: permil
description: delta13C of material analyzed for 14C
TSid: chron7
variableName: delta13Cuncertainty
units: permil
description: delta13C uncertainty
TSid: chron8
variableName: thickness
units: cm
description: thickness of sample (along depth axis)
TSid: chron9
variableName: labID
description: laboratory ID from radiocarbon facility
TSid: chron10
variableName: materialDated
description: material analyzed
TSid: chron11
variableName: activity
units: Bq g-1
description: 210Pb, 239+240Pu or 137Cs activity
TSid: chron12
variableName: activityUncertainty
units: Bq g-1
description: 210Pb, 239+240Pu or 137Cs activity uncertainty
TSid: chron13
variableName: supportedActivity
description: Y if supported 210Pb activity, N if unsupported 210Pb activity
TSid: chron14
variableName: x210PbModel
description: model used to convert 210Pb activity to age (e.g., constant rate of supply)
TSid: chron15
variableName: age
units: yr BP
description: years before 1950 (calibrated age, or ages that dont need calibration)
TSid: chron16
variableName: SD
units: yr BP
description: uncertainty in age
TSid: chron17
variableName: reservoirAge14C
units: yr14C BP
description: 14C reservoir age
TSid: chron18
variableName: reservoirAge14CUncertainty
units: yr14C BP
description: 14C reservoir age uncertainty
TSid: chron19
variableName: useInAgeModel
description: was this date used in the age model?
TSid: RkAJDUldOBROKb3nx
variableName: reject
root
pub
pub1
geo
PaleoData columns
year (yr AD)
interpretation
1
2
3
4
depth (cm)
interpretation
1
2
3
4
d2H (permil)
interpretation
1
2
3
4
5
6
ChronData columns
depth (cm)
age14C (yr14C BP)
SD (yr14C BP)
fractionModern ()
fractionModernUncertainty ()
delta13C (permil)
delta13Cuncertainty (permil)
thickness (cm)
labID ()
materialDated ()
activity (Bq g-1)
activityUncertainty (Bq g-1)
supportedActivity ()
x210PbModel ()
age (yr BP)
SD (yr BP)
reservoirAge14C (yr14C BP)
reservoirAge14CUncertainty (yr14C BP)
useInAgeModel ()
reject ()