Download LiPD file without ensemble tables
Download LiPD file as JSON-LD (no ensemble data)
Download LiPD file with ensemble data
L <- lipdR::readLipd("https://lipdverse.org/data/EhsuizR7H2J8bkQO8Cev/1_0_5/LS07LAHA.lpd")Report an issue (include datasetId and version)
In compilations: (only most recent versions are shown)
iso2k-1_1_1
archiveType: LakeSediment
originalDataUrl: this compilation
lipdVersion: 1.3
author: Lamb, H. F. , Leng, M. J. , Telford, R. J. , Ayenew, T. , Umer, M.
journal: The Holocene
volume: 17
pages: 517526
title: Oxygen and carbon isotope composition of authigenic carbonate from an Ethiopian lake: a climate record of the last 2000 years
doi: 10.1177/0959683607076452
latitude: 11.35
longitude: 39.72
elevation: 1950
siteName: Hayq
TSid: MAT87d407967c
variableName: year
units: yr AD
description: Year AD
rank: NA
scope: climate
rank: NA
scope: climate
TSid: MAT11c43606cc
variableName: depth
units: cm
description: depth
rank: NA
scope: climate
rank: NA
scope: climate
TSid: LS07LAHA
variableName: d18O
units: permil
description: carbonate
scope: climate
scope: climate
scope: climate
basis: Rainfall at Addis Ababa has a weighted mean 18O composition of 1.2?, while groundwater values recorded in Ethiopia range from a6.2? to a1.3? (table 2 in Lamb et al., 2000). It seems likely that the oxygen isotope values for the lake surface water (up to 9? VSMOW) result from evaporative enrichment (confirmed by the hydrological balance, Table 1), which is also represented in the high values for the carbonates in the surface sediments (18O 6.2? VPDB).
direction: negative
equilibriumEvidence: Using Leng and Marshall?s (2004) expression of Kim and O?Neil?s (1997) equation, the surface sediment 18O value of 6.2? (core top taken in 1999) and 18O water of 8.1? (average between 1997 and 2001, Table 2) suggests precipitation temperatures of around 23C, higher than the measured mean annual air temperature of 18C.
inferredMaterial: lake water
integrationTimeUnits: Years
rank: 1
scope: isotope
variable: effectivePrecipitation
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_E
direction: negative
equilibriumEvidence: Using Leng and Marshall?s (2004) expression of Kim and O?Neil?s (1997) equation, the surface sediment 18O value of 6.2? (core top taken in 1999) and 18O water of 8.1? (average between 1997 and 2001, Table 2) suggests precipitation temperatures of around 23C, higher than the measured mean annual air temperature of 18C.
inferredMaterial: Lake water
integrationTimeUnits: Years
rank: 2
scope: isotope
variable: temperature
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T_water
scope: isotope
TSid: chron1
variableName: depth
units: cm
description: midpoint 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 g1
description: 210Pb, 239+240Pu or 137Cs activity
TSid: chron12
variableName: activityUncertainty
units: Bq g1
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 modelpermil
TSid: RRTJr8GM6I5BGQP10
variableName: reject
root
pub
pub1
geo
PaleoData columns
year (yr AD)
interpretation
1
2
depth (cm)
interpretation
1
2
d18O (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 g1)
activityUncertainty (Bq g1)
supportedActivity ()
x210PbModel ()
age (yr BP)
SD (yr BP)
reservoirAge14C (yr14C BP)
reservoirAge14CUncertainty (yr14C BP)
useInAgeModel ()
reject ()