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L <- lipdR::readLipd("https://lipdverse.org/data/tS1Spz2bCWL480iImXnO/1_0_6/CO13COXM.lpd")Report an issue (include datasetId and version)
In compilations: (only most recent versions are shown)
iso2k-1_1_2
archiveType: Coral
originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/13672
lipdVersion: 1.3
author: list(name = "Cobb, K.M.")
doi: 10.1126/science.1228246
latitude: 1.52
longitude: -157.24
siteName: Kiritimati Island, Line Islands, Kiribati
TSid: MATc537335a6d
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: MAT8d9d07e558
variableName: depth
units: cm
description: depth
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
TSid: CO13COXM03A
variableName: d18O
units: permil
description: carbonate
basis: El Nino events bring warmer and rainier conditions to the Northern Line Islands, conditions which constructively act to decrease coral d18O. The opposite climatic effects occur during cool La Nina extremes, driving an increase in coral d18O.
direction: decrease/increase
interpDirection: decrease/increase
scope: climate
variable: temperature
variableDetail: sea surface
variableGroup: temperature and salinity
scope: climate
scope: climate
basis: Modern Line Islands coral d18O records are high- ly correlated to the regional-scale NIi¿½O3.4 index (defined as the average of instrumental SSTs from 5i¿½S to 5i¿½N, and from 120i¿½ to 170i¿½W)
direction: negative
inferredMaterial: seawater
integrationTime: 1
integrationTimeBasis: Relative chronologies were constructed by assigning the maximum ?18O point for a given year to January 15th and linearly interpolating ?18O datapoints in between these tie points, following the procedure outlined in Cobb et al., 2002 for the Palmyra modern and fossil corals U/Th dates used to estimate absolute ages
integrationTimeUnits: months
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: subannual
variable: temperature
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T_water
coefficient: NA
fraction: NA
direction: positive
inferredMaterial: seawater
integrationTime: 1
integrationTimeBasis: Relative chronologies were constructed by assigning the maximum ?18O point for a given year to January 15th and linearly interpolating ?18O datapoints in between these tie points, following the procedure outlined in Cobb et al., 2002 for the Palmyra modern and fossil corals U/Th dates used to estimate absolute ages
integrationTimeUnits: months
mathematicalRelation: linear
rank: 2
scope: isotope
variable: seawaterIsotope
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: d18O_seawater
coefficient: NA
fraction: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
TSid: chron1
variableName: depthUTh
units: mm
description: mid-point depth of the sub-sample drilled for U-Th age
TSid: chron20
variableName: depthtopPb
units: mm
description: Depth at the top of the sub-sample for 210Pb analysis
TSid: chron21
variableName: depthbottomPb
units: mm
description: Depth at the bottom of the sub-sample for 210Pb analysis
TSid: chron24
variableName: depthtopCs
units: mm
description: Depth at the top of the sub-sample for 137Cs analysis
TSid: chron25
variableName: depthbottomCs
units: mm
description: Depth at the bottom of the sub-sample for 137Cs analysis
TSid: chron2
variableName: SampleID
description: Sample ID for the U-Th age measured
TSid: chron3
variableName: weight
units: mg
description: Weight of powder analyzed for U-Th age
TSid: chron4
variableName: U238
units: ppb
description: 238U content of the sub-sample
TSid: chron5
variableName: U238_error
units: ppb
description: Analytical uncertainty of 238U
TSid: chron6
variableName: Th232
units: ppt
description: 232Th content of the sub-sample
TSid: chron7
variableName: Th232_error
units: ppt
description: Analytical uncertainty of 232Th
TSid: chron8
variableName: d234U
units: (ratio)
description: d234U measured in the sub-sample
TSid: chron9
variableName: d234U_error
description: Analytical uncertainty of d234U
TSid: chron10
variableName: Th230_U238activity
units: activity
description: [230Th/238U] activity measured in the sub-sample
TSid: chron11
variableName: U_Thactivity_error
description: Analytical uncertainty of 230Th-238U activity
TSid: chron12
variableName: Th230_Th232ratio
units: ppm
description: [230Th/232Th] ratio in the sub-sample
TSid: chron13
variableName: Thratio_error
units: ppm
description: Analytical uncertainty of 230Th-232Th ratio
TSid: chron14
variableName: AgeUncorrected
units: years ago
description: Uncorrected U-Th age of the sub-sample
TSid: chron15
variableName: AgeUncorr_error
units: yrs
description: Analytical uncertainty of Uncorrected Age
TSid: chron16
variableName: age
units: years ago
description: Corrected U-Th age of the sub-sample
TSid: chron17
variableName: AgeCorr_error
units: yrs
description: Uncertainty of Corrected Age (includes Th correction)
TSid: chron18
variableName: dU234initial
units: (ratio)
description: Calculated initial d234U in the sub-sample
TSid: chron19
variableName: dU234i_error
description: Analytical uncertainty of calculated d234U initial
TSid: chron22
variableName: Pb210excess
units: dpm/g
description: Lead-210 excess measured in the sub-sample
TSid: chron23
variableName: Pb210_error
units: dpm/g
description: Analytical uncertainty of 210Pb excess
TSid: chron26
variableName: Cs137gamactivity
units: Bq/g
description: Cesium-137 g-activity measured in the sub-sample
TSid: chron27
variableName: Cs137_error
units: Bq/g
description: Analytical uncertainty of 137Cs g-activity
TSid: chron28
variableName: bandAge
units: yr CE
description: Band counted age for the U-Th sample
TSid: chron29
variableName: sampleType
description: Sample description. E.g., round plug, annual density band
root
pub
pub1
geo
PaleoData columns
year (yr AD)
interpretation
1
2
3
4
depth (cm)
interpretation
1
2
3
4
d18O (permil)
interpretation
1
2
3
4
5
6
ChronData columns
depthUTh (mm)
depthtopPb (mm)
depthbottomPb (mm)
depthtopCs (mm)
depthbottomCs (mm)
SampleID ()
weight (mg)
U238 (ppb)
U238_error (ppb)
Th232 (ppt)
Th232_error (ppt)
d234U ((ratio))
d234U_error ()
Th230_U238activity (activity)
U_Thactivity_error ()
Th230_Th232ratio (ppm)
Thratio_error (ppm)
AgeUncorrected (years ago)
AgeUncorr_error (yrs)
age (years ago)
AgeCorr_error (yrs)
dU234initial ((ratio))
dU234i_error ()
Pb210excess (dpm/g)
Pb210_error (dpm/g)
Cs137gamactivity (Bq/g)
Cs137_error (Bq/g)
bandAge (yr CE)
sampleType ()