LS09SASP - v1.0.5

Dataset Id: ibVsIVMBin5vvLzzHu5r

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R code to load dataset:

L <- lipdR::readLipd("https://lipdverse.org/data/ibVsIVMBin5vvLzzHu5r/1_0_5/LS09SASP.lpd")

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In compilations: (only most recent versions are shown)

iso2k-1_1_1

root

archiveType: LakeSediment

originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/29432

lipdVersion: 1.3

pub
pub1

author: Sachs, Julian P. , Sachse, Dirk , Smittenberg, Rienk H. , Zhang, Zhaohui , Battisti, David S. , Golubic, Stjepko

journal: Nature Geoscience

volume: 2

pages: -6

title: Southward movement of the Pacific intertropical convergence zone AD 1400?1850

doi: 10.1038/NGEO554

geo

latitude: 7.15

longitude: 134.3667

elevation: 4

siteName: Spooky Lake

PaleoData columns
year (yr AD)

TSid: MAT3e773ec33c

variableName: year

units: yr AD

description: Year AD

depth (cm)

TSid: MAT851bf03235

variableName: depth

units: cm

description: depth

d2H (permil)

TSid: LS09SASP01A

variableName: d2H

units: permil

description: aquatic biomarker

interpretation
1

basis: dD values of lake surface water are controlled by the amount of rainfall, its isotopic composition and the amount of mixing with the underlying seawater. As rain also increases the density stratification in the lakes, decreasing mixing, surface water dD values are expected to be significantly lower during wet periods compared with dry periods. Conclusions of the paper are about moisture balance (P-E) in the tropical Pacific.

interpDirection: positive

scope: climate

seasonality: Annual

seasonalityOriginal: Annual

variable: precipitation

variableDetail: air@surface

variableDetailOriginal: air

variableGroup: EffectiveMoisture

variableGroupDirection: negative

variableGroupOriginal: Precipitation amount

2

scope: climate

3

scope: climate

4

basis: Permanent anoxia in the subsurface water confines phytoplankton, dominated by dinoflagellates and diatoms24, to the oxygenated, brackish and deuterium-depleted surface water where their lipid ?D values can be expected to closely co-vary with the surface water ?Dvalues25,26. ?D values of that water are controlled by the amount of rainfall, its isotopic composition and the amount of mixing with the underlying sea water. As rain also increases the density stratification in the lakes, decreasing mixing, surface water ?D values are expected to be significantly lower during wet periods compared with dry periods. Zhang and Sachs 2007, Organic Geochemistry, 38: 582-608.

direction: negative

inferredMaterial: lake water

mathematicalRelation: linear

scope: isotope

seasonality: Annual

seasonalityOriginal: Annual

variable: precipitation

variableGroup: EffectiveMoisture

variableGroupDirection: negative

variableGroupOriginal: P_amount

5

basis: Permanent anoxia in the subsurface water confines phytoplankton, dominated by dinoflagellates and diatoms24, to the oxygenated, brackish and deuterium-depleted surface water where their lipid ?D values can be expected to closely co-vary with the surface water ?Dvalues25,26. ?D values of that water are controlled by the amount of rainfall, its isotopic composition and the amount of mixing with the underlying sea water. As rain also increases the density stratification in the lakes, decreasing mixing, surface water ?D values are expected to be significantly lower during wet periods compared with dry periods. Zhang and Sachs 2007, Organic Geochemistry, 38: 582-608.

direction: depends on source, transport history, etc

inferredMaterial: lake water

scope: isotope

seasonality: Annual

seasonalityOriginal: Annual

variable: precipitationIsotope

variableGroup: P_isotope

variableGroupDirection: positive

variableGroupOriginal: rainfall d2H

6

basis: Permanent anoxia in the subsurface water confines phytoplankton, dominated by dinoflagellates and diatoms24, to the oxygenated, brackish and deuterium-depleted surface water where their lipid dD values can be expected to closely co-vary with the surface water dDvalues25,26. dD values of that water are controlled by the amount of rainfall, its isotopic composition and the amount of mixing with the underlying sea water. As rain also increases the density stratification in the lakes, decreasing mixing, surface water dD values are expected to be significantly lower during wet periods compared with dry periods. Zhang and Sachs 2007, Organic Geochemistry, 38: 582-608.

direction: positive (more mixing, higher d2H in surface waters)

inferredMaterial: lake water

scope: isotope

seasonality: Annual

seasonalityOriginal: Annual

variable: lakeWaterIsotope

variableGroup: mixing with sea water which is in bottom of meromictic lake

d2H (permil)

TSid: LPD292174f8

variableName: d2H

units: permil

description: aquatic biomarker

interpretation
1

scope: climate

2

scope: climate

3

scope: climate

4

direction: negative

mathematicalRelation: linear

scope: isotope

variable: hydrologicBalance

variableGroup: EffectiveMoisture

variableGroupDirection: negative

variableGroupOriginal: I_E

5

scope: isotope

6

scope: isotope

ChronData columns
depth (cm)

TSid: chron1

variableName: depth

units: cm

description: mid-point depth

age14C (yr14C BP)

TSid: chron2

variableName: age14C

units: yr14C BP

description: 14C years before 1950

SD (yr14C BP)

TSid: chron3

variableName: SD

units: yr14C BP

description: 14C years uncertainty

fractionModern ()

TSid: chron4

variableName: fractionModern

description: fraction of modern 14C activity

fractionModernUncertainty ()

TSid: chron5

variableName: fractionModernUncertainty

description: fraction of modern 14C activity uncertainty

delta13C (permil)

TSid: chron6

variableName: delta13C

units: permil

description: delta13C of material analyzed for 14C

delta13Cuncertainty (permil)

TSid: chron7

variableName: delta13Cuncertainty

units: permil

description: delta13C uncertainty

thickness (cm)

TSid: chron8

variableName: thickness

units: cm

description: thickness of sample (along depth axis)

labID ()

TSid: chron9

variableName: labID

description: laboratory ID from radiocarbon facility

materialDated ()

TSid: chron10

variableName: materialDated

description: material analyzed

activity (Bq g-1)

TSid: chron11

variableName: activity

units: Bq g-1

description: 210Pb, 239+240Pu or 137Cs activity

activityUncertainty (Bq g-1)

TSid: chron12

variableName: activityUncertainty

units: Bq g-1

description: 210Pb, 239+240Pu or 137Cs activity uncertainty

supportedActivity ()

TSid: chron13

variableName: supportedActivity

description: Y if supported 210Pb activity, N if unsupported 210Pb activity

x210PbModel ()

TSid: chron14

variableName: x210PbModel

description: model used to convert 210Pb activity to age (e.g., constant rate of supply)

age (yr BP)

TSid: chron15

variableName: age

units: yr BP

description: years before 1950 (calibrated age, or ages that dont need calibration)

SD (yr BP)

TSid: chron16

variableName: SD

units: yr BP

description: uncertainty in age

reservoirAge14C (yr14C BP)

TSid: chron17

variableName: reservoirAge14C

units: yr14C BP

description: 14C reservoir age

reservoirAge14CUncertainty (yr14C BP)

TSid: chron18

variableName: reservoirAge14CUncertainty

units: yr14C BP

description: 14C reservoir age uncertainty

useInAgeModel ()

TSid: chron19

variableName: useInAgeModel

description: was this date used in the age model?