L <- lipdR::readLipd("https://lipdverse.org/data/r86BjdY5rD9VLWWNw0Tm/1_0_6/LS12THAY.lpd")
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iso2k-1_1_2
archiveType: LakeSediment
originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/13114
lipdVersion: 1.3
dataContributor: EKT
author: list(name = "Thomas")
doi: 10.1007/s10933-012-9584-7
latitude: 70.459
longitude: -70.086
elevation: 68
siteName: Ayr Lake
TSid: MAT1f2a2beb33
variableName: year
units: yr AD
description: Year AD
TSid: LPD32931661
variableName: depth
units: cm
description: bottom depth (mm)
TSid: MATbc6c134f26
variableName: depth
units: cm
description: depth
TSid: LS12THAY01E
variableName: d2H
units: permil
description: terrestrial biomarker
basis: The remarkable similarity between d2Hwax and regional temperature indicates that d2Hwax is a useful proxy to reconstruct temper- ature at decadal- to sub-centennial-resolution.
direction: positive
interpDirection: positive
scope: climate
seasonality: Summer
seasonalityOriginal: summer
variable: temperature
variableDetail: air@surface
variableDetailOriginal: air
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
scope: climate
scope: climate
basis: The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake.
coefficient: NA
direction: positive
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Growing Season
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: Bottom line: more snowmelt providing source water to plants causes pool of plant source water to be more 2H-depleted. "The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake."
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 2
scope: isotope
seasonality: Winter
variable: meltwater
variableGroup: winter snow melting during growing season
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY01B
variableName: d2H
units: permil
description: terrestrial biomarker
basis: The remarkable similarity between d2Hwax and regional temperature indicates that d2Hwax is a useful proxy to reconstruct temper- ature at decadal- to sub-centennial-resolution.
direction: positive
interpDirection: positive
scope: climate
seasonality: Summer
seasonalityOriginal: summer
variable: temperature
variableDetail: air@surface
variableDetailOriginal: air
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
scope: climate
scope: climate
basis: The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake.
coefficient: NA
direction: positive
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Growing Season
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: Bottom line: more snowmelt providing source water to plants causes pool of plant source water to be more 2H-depleted. "The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake."
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 2
scope: isotope
seasonality: Winter
variable: meltwater
variableGroup: winter snow melting during growing season
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY01C
variableName: d2H
units: permil
description: terrestrial biomarker
basis: The remarkable similarity between d2Hwax and regional temperature indicates that d2Hwax is a useful proxy to reconstruct temper- ature at decadal- to sub-centennial-resolution.
direction: positive
interpDirection: positive
scope: climate
seasonality: Summer
seasonalityOriginal: summer
variable: temperature
variableDetail: air@surface
variableDetailOriginal: air
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
scope: climate
scope: climate
basis: The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake.
coefficient: NA
direction: positive
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Jun-Aug
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: Bottom line: more snowmelt providing source water to plants causes pool of plant source water to be more 2H-depleted. "The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake."
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 2
scope: isotope
seasonality: Winter
variable: meltwater
variableGroup: winter snow melting during growing season
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY01D
variableName: d2H
units: permil
description: terrestrial biomarker
basis: The remarkable similarity between d2Hwax and regional temperature indicates that d2Hwax is a useful proxy to reconstruct temper- ature at decadal- to sub-centennial-resolution.
direction: positive
interpDirection: positive
scope: climate
seasonality: Summer
seasonalityOriginal: summer
variable: temperature
variableDetail: air@surface
variableDetailOriginal: air
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
scope: climate
scope: climate
basis: The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake.
coefficient: NA
direction: positive
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Growing Season
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: Bottom line: more snowmelt providing source water to plants causes pool of plant source water to be more 2H-depleted. "The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake."
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 2
scope: isotope
seasonality: Winter
variable: meltwater
variableGroup: winter snow melting during growing season
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY0130s
variableName: uncertainty
units: permil
description: stdev of dD of terrestrial biomarker
scope: climate
scope: climate
scope: climate
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY0124s
variableName: uncertainty
units: permil
description: stdev of dD of terrestrial biomarker
scope: climate
scope: climate
scope: climate
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY0126s
variableName: uncertainty
units: permil
description: stdev of dD of terrestrial biomarker
scope: climate
scope: climate
scope: climate
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY0128s
variableName: uncertainty
units: permil
description: stdev of dD of terrestrial biomarker
scope: climate
scope: climate
scope: climate
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY01A
variableName: d2H
units: permil
description: terrestrial biomarker
basis: The remarkable similarity between d2Hwax and regional temperature indicates that d2Hwax is a useful proxy to reconstruct temper- ature at decadal- to sub-centennial-resolution.
interpDirection: positive
scope: climate
seasonality: Summer
seasonalityOriginal: summer
variable: temperature
variableDetail: air@surface
variableDetailOriginal: air
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
scope: climate
scope: climate
basis: The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake.
coefficient: NA
direction: positive
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Growing Season
variable: precipitationIsotope
variableGroup: P_isotope
variableGroupDirection: positive
basis: Bottom line: more snowmelt providing source water to plants causes pool of plant source water to be more 2H-depleted. "The major source of water for plants in the Arctic, where permafrost precludes extensive groundwater systems, is precipitation, either as snowmelt or summer rain (Elberling et al. 2008). Thus, we hypothesize that d2Hwax in the Arctic is likely closely related to d2Hprecip. Leaf wax synthesis occurs during the summer months when plants are neither temper- ature- nor light-limited. The apparent fractionation (e) between leaf waxes and source waters varies with relative humidity (RH) and with potential evapotrans- piration (Sachse et al. 2012). Long-term average growing season (June, July, August) RH at Clyde River is 80% (Environment Canada, 2011). The eleven-month dataset from Silasiutitalik at the head of Clyde Inlet suggests that growing season RH is slightly lower inland, around 75% (Kangiqtugaapik (Clyde River) Weather Station Network, 2011). The n-alkanoic acids synthesized by plants that grow at 70?80% RH have an e of -100 to -120% relative to annual mean precipitation (Hou et al. 2008). The d2Hwax values from Ayr Lake sediments (-240 to -265 %) therefore suggest that source water d2H should range between -140 to -165% (assuming an e of -100%) and -120 to -145% (assuming an e of -120%). These calculated source water d2H values are within the range of measured summer d2Hprecip values for both Pond Inlet and Hall Beach, although the values obtained with the larger e are close to the maximum summer d2Hprecip values for Pond Inlet. We therefore hypothesize that plants in this catchment utilize summer precipitation as their main water source (Fig. 2). Variability in summer d2Hprecip, or utilization of small but varying amounts of winter precipitation, is likely driving variability in d2Hwax at Ayr Lake."
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: soil water
integrationTime: 1 to 10
integrationTimeBasis: Leaf wax hydrogen isotopes exhibit a surprising amount of variability at the sub-decadal scale (Fig. 6). This high degree of variability indicates that leaf waxes are likely produced, transported and deposited in a relatively short period of time.
integrationTimeUncertainty: 10
integrationTimeUnits: years
mathematicalRelation: linear
rank: 2
scope: isotope
seasonality: Winter
variable: meltwater
variableGroup: winter snow melting during growing season
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: LS12THAY0122s
variableName: uncertainty
units: permil
scope: climate
scope: climate
scope: climate
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
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: 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?
root
pub
pub1
geo
PaleoData columns
year (yr AD)
depth (cm)
depth (cm)
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
d2H (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
uncertainty (permil)
interpretation
1
2
3
4
5
6
uncertainty (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
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 ()