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L <- lipdR::readLipd("https://lipdverse.org/data/mcaveMswFlyBnKzjKnYC/1_0_5/LS14FEZA.lpd")Report an issue (include datasetId and version)
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iso2k-1_1_1
archiveType: LakeSediment
originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/15634
lipdVersion: 1.3
author: Feakins, Sarah J. , Kirby, Matthew E. , Cheetham, Michael I. , Ibarra, Yadira , Zimmerman, Susan R.H.
doi: 10.1016/j.orggeochem.2013.10.015
latitude: 34.7778
longitude: -120.0392
elevation: 730
siteName: Zaca Lake
TSid: MAT0ee6aa23ee
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: MATe175dfba95
variableName: depth
units: cm
description: depth
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
TSid: LS14FEZA01C
variableName: d2H
units: permil
description: terrestrial biomarker
basis: These changes in moisture source have been further linked to SST anomalies (SSTa) in the Kuroshio Extension region of the N Pacific, which exerts steering on atmo- spheric circulation and hence moisture sources to the west coast of N America. ... These positive excursions may be linked to warm Kuroshio Extension SSTa, driv- ing greater amplitude waves in the circulation over the N Pacific entraining subtropical moisture sources but generally associated with drier conditions in coastal southern California. Conversely negative isotopic excursions centered on 300 and 800 yr BP may correspond to more N Pacific moisture flux and wetter conditions in coastal southern California, the former of these perhaps associ- ated with the Little Ice Age. In combination with other proxies recording wet/dry climate regime shifts, the information on mois- ture source from precipitation isotopes may thus be particularly helpful in understanding the dynamical causes of hydroclimate shifts. Warm SST anomaly --> less moisture flux -->more enriched precipitation. "Elevated dD values indi- cate more (sub)tropical moisture sources and/or drier conditions, whereas lower dD values are consistent with N Pacific moisture sources and/or more antecedent precipitation. "
direction: decrease
interpDirection: decrease
rank: NA
scope: climate
variable: circulationVariable
variableGroup: Moisture flux from the subtropical North Pacific (driven by SST anomalies in the Kuroshio Extension region)
scope: climate
scope: climate
basis: SEASONALITY: "First, during water uptake, plants are expected to sample the spring growing season precipitation, at the end of the wet season [October-March], as the temperature warms up and before the dry summer months (Feakins and Sessions, 2010; Kahmen et al., 2011; Tipple et al., 2013). During this time, the plants may record the isotopic signature of just a few storms each year heightening variability; however, sedimentary samples integrating a decade might average the signal from > 20 storms. " PARAMETER: "Paleoclimatic interpretation of the precipitation isotopic history recorded in the Crystal Cave has been suggested to record changes in moisture source primarily and local amount effect secondarily (McCabe-Glynn et al., 2013). ... Our record provides an extension of the Crystal Cave isotopic record, from a more southerly coastal location, but likely also records interdecadal variability in the same processes. ... We suggest that the plant leaf wax record preferentially captures spring precipitation isotopic anomalies integrated over decades, providing a sensitive record of atmospheric circulation and moisture source changes. "
direction: positive
inferredMaterial: soil water
integrationTimeBasis: Rapid transfer from plant to sediment is likely within the small, steep-sided watershed, suggesting that the leaf wax record would be capable of reconstructing up to decadal resolution variation in leaf wax dD values.
integrationTimeUnits: years
rank: 1
scope: isotope
seasonality: Spring
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: SEASONALITY: "First, during water uptake, plants are expected to sample the spring growing season precipitation, at the end of the wet season [October-March], as the temperature warms up and before the dry summer months (Feakins and Sessions, 2010; Kahmen et al., 2011; Tipple et al., 2013). During this time, the plants may record the isotopic signature of just a few storms each year heightening variability; however, sedimentary samples integrating a decade might average the signal from > 20 storms. " PARAMETER: "Paleoclimatic interpretation of the precipitation isotopic history recorded in the Crystal Cave has been suggested to record changes in moisture source primarily and local amount effect secondarily (McCabe-Glynn et al., 2013). ... Our record provides an extension of the Crystal Cave isotopic record, from a more southerly coastal location, but likely also records interdecadal variability in the same processes."
rank: 2
scope: isotope
seasonality: Spring
variable: precipitation
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_amount
basis: Secondly, plant community changes in the catchment (or other ecological changes) may influence the dD record. Vegetation changes could reasonably have an influence on the mean catchment ewax/precip that lasts for decades, so this mecha- nism might operate too slowly to explain sample-to-sample vari- ability in the sediment, although it may contribute to the multi- decadal variability. We observed abundance variation in homo- logues downcore (Fig. 5), which could be consistent with ecological changes influencing dD values; however, the non-unique chain length distributions of different plant species (Bush and McIner- ney, 2013) make it impossible to draw unique solutions here.
rank: 3
scope: isotope
variable: deleteMe
variableGroup: plant community composition
TSid: LS14FEZA01D
variableName: d2H
units: permil
description: terrestrial biomarker
basis: These changes in moisture source have been further linked to SST anomalies (SSTa) in the Kuroshio Extension region of the N Pacific, which exerts steering on atmo- spheric circulation and hence moisture sources to the west coast of N America. ... These positive excursions may be linked to warm Kuroshio Extension SSTa, driv- ing greater amplitude waves in the circulation over the N Pacific entraining subtropical moisture sources but generally associated with drier conditions in coastal southern California. Conversely negative isotopic excursions centered on 300 and 800 yr BP may correspond to more N Pacific moisture flux and wetter conditions in coastal southern California, the former of these perhaps associ- ated with the Little Ice Age. In combination with other proxies recording wet/dry climate regime shifts, the information on mois- ture source from precipitation isotopes may thus be particularly helpful in understanding the dynamical causes of hydroclimate shifts. Warm SST anomaly --> less moisture flux -->more enriched precipitation. "Elevated dD values indi- cate more (sub)tropical moisture sources and/or drier conditions, whereas lower dD values are consistent with N Pacific moisture sources and/or more antecedent precipitation. "
direction: decrease
interpDirection: decrease
rank: NA
scope: climate
variable: circulationVariable
variableGroup: Moisture flux from the subtropical North Pacific (driven by SST anomalies in the Kuroshio Extension region)
scope: climate
scope: climate
basis: SEASONALITY: "First, during water uptake, plants are expected to sample the spring growing season precipitation, at the end of the wet season [October-March], as the temperature warms up and before the dry summer months (Feakins and Sessions, 2010; Kahmen et al., 2011; Tipple et al., 2013). During this time, the plants may record the isotopic signature of just a few storms each year heightening variability; however, sedimentary samples integrating a decade might average the signal from > 20 storms. " PARAMETER: "Paleoclimatic interpretation of the precipitation isotopic history recorded in the Crystal Cave has been suggested to record changes in moisture source primarily and local amount effect secondarily (McCabe-Glynn et al., 2013). ... Our record provides an extension of the Crystal Cave isotopic record, from a more southerly coastal location, but likely also records interdecadal variability in the same processes. ... We suggest that the plant leaf wax record preferentially captures spring precipitation isotopic anomalies integrated over decades, providing a sensitive record of atmospheric circulation and moisture source changes. "
direction: positive
inferredMaterial: soil water
integrationTimeBasis: Rapid transfer from plant to sediment is likely within the small, steep-sided watershed, suggesting that the leaf wax record would be capable of reconstructing up to decadal resolution variation in leaf wax dD values.
integrationTimeUnits: years
rank: 1
scope: isotope
seasonality: Oct-Mar
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: SEASONALITY: "First, during water uptake, plants are expected to sample the spring growing season precipitation, at the end of the wet season [October-March], as the temperature warms up and before the dry summer months (Feakins and Sessions, 2010; Kahmen et al., 2011; Tipple et al., 2013). During this time, the plants may record the isotopic signature of just a few storms each year heightening variability; however, sedimentary samples integrating a decade might average the signal from > 20 storms. " PARAMETER: "Paleoclimatic interpretation of the precipitation isotopic history recorded in the Crystal Cave has been suggested to record changes in moisture source primarily and local amount effect secondarily (McCabe-Glynn et al., 2013). ... Our record provides an extension of the Crystal Cave isotopic record, from a more southerly coastal location, but likely also records interdecadal variability in the same processes."
rank: 2
scope: isotope
seasonality: Spring
variable: precipitation
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_amount
basis: Secondly, plant community changes in the catchment (or other ecological changes) may influence the dD record. Vegetation changes could reasonably have an influence on the mean catchment ewax/precip that lasts for decades, so this mecha- nism might operate too slowly to explain sample-to-sample vari- ability in the sediment, although it may contribute to the multi- decadal variability. We observed abundance variation in homo- logues downcore (Fig. 5), which could be consistent with ecological changes influencing dD values; however, the non-unique chain length distributions of different plant species (Bush and McIner- ney, 2013) make it impossible to draw unique solutions here.
rank: 3
scope: isotope
variable: deleteMe
variableGroup: plant community composition
TSid: LS14FEZA01F
variableName: d2H
units: permil
description: biomarkers
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
inferredMaterial: not interpreted
scope: isotope
scope: isotope
scope: isotope
TSid: LPDd239c4652
variableName: uncertainty
units: permil
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
TSid: LS14FEZA01B
variableName: d2H
units: permil
description: biomarkers
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
basis: Downcore variation involved subtle changes in distribution, C22 and C24 covarying and suggesting a similar source, perhaps partially aquatic, with an increase in recent decades perhaps related to indirect fertilization of the lake (Fig. 5a).
inferredMaterial: lake water and soil water
rank: 1
scope: isotope
variable: deleteMe
variableGroup: Veg
scope: isotope
scope: isotope
TSid: LPDd72fd146
variableName: uncertainty
units: permil
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
TSid: LPD9e7bf79e
variableName: uncertainty
units: permil
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
TSid: LPD9e7bf79e2
variableName: uncertainty
units: permil
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
TSid: LS14FEZA01E
variableName: d2H
units: permil
description: biomarkers
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
inferredMaterial: not interpreted
scope: isotope
scope: isotope
scope: isotope
TSid: LPDd239c465
variableName: uncertainty
units: permil
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
TSid: LS14FEZA01A
variableName: d2H
units: permil
description: biomarkers
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
basis: Downcore variation involved subtle changes in distribution, C22 and C24 covarying and suggesting a similar source, perhaps partially aquatic, with an increase in recent decades perhaps related to indirect fertilization of the lake (Fig. 5a).
inferredMaterial: lake water and soil water
rank: 1
scope: isotope
variable: deleteMe
variableGroup: Veg
scope: isotope
scope: isotope
TSid: LPD8ec8baf1
variableName: uncertainty
units: unitless
description: stdev of d2H measurements
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
scope: isotope
scope: isotope
scope: isotope
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: age14Cuncertainty
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: ageUncertainty
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?
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
d2H (permil)
interpretation
1
2
3
4
5
6
d2H (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
7
d2H (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
7
uncertainty (permil)
interpretation
1
2
3
4
5
6
7
uncertainty (permil)
interpretation
1
2
3
4
5
6
7
d2H (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
7
d2H (permil)
interpretation
1
2
3
4
5
6
uncertainty (unitless)
interpretation
1
2
3
4
5
6
7
ChronData columns
depth (cm)
age14C (yr14C BP)
age14Cuncertainty (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)
ageUncertainty (yr BP)
reservoirAge14C (yr14C BP)
reservoirAge14CUncertainty (yr14C BP)
useInAgeModel ()