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iso2k-1_1_0
archiveType: Wood
originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/22549
lipdVersion: 1.3
author: Sano M.
journal: Global and Planetary Change
volume: 157
pages: 73-82
title: Moisture source signals preserved in a 242-year tree-ring δ 18 O chronology in the western Himalaya
doi: 10.1016/j.gloplacha.2017.08.009
latitude: 32.2167
longitude: 77.2167
elevation: 2700
siteName: Manali
country: India
TSid: WEB05ec8243
variableName: year
units: yr AD
description: calendar year AD
rank: NA
scope: climate
rank: NA
scope: climate
rank: NA
scope: climate
TSid: WEB30c97fa8
variableName: d18O
units: permil
description: cellulose
basis: Calibration with instrumental rainfall record; More specifically, inverse correlations between the I´18O of precipitation and the amount of precipitation are observed at low latitudes, known as the a€˜amount effecta€™ (AraguA¡s-AraguA¡s et al., 1998; Dansgaard, 1964). Therefore, smaller amounts of precipitation are associated with higher I´18O values for precipitation, representing the enrichment of 18O in the source water that is taken up by the trees.
direction: negative
fraction: 0.3481
rank: 1
scope: climate
seasonality: Jun-Sep
variable: precipitation
variableDetail: Seasonal
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_amount
basis: Warmer conditions enhance the evaporation of the soil water, which increases δ18O in the source water.
direction: positive
fraction: 0.25
rank: 1
scope: climate
seasonality: Jun-Sep
variable: temperature
variableDetail: atmospheric surface temperature
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
variableOriginal: temperature
basis: The isotopic composition of the leaf water originating from soil moisture is subsequently modulated by its transpiration through the stomata, leading to the preferential loss of the lighter isotope (16O) and the consequent enrichment of the leaf water 18O. During the transpiration process, lower relative humidity increases the δ18O of the leaf water.
direction: negative
fraction: 0.36
rank: 1
scope: climate
seasonality: Jun-Sep
variable: relativeHumidity
variableDetail: surface relative humidity
variableGroup: relative humidity
basis: Because tree-ring δ18O correlates negatively with precipitation and relative humidity and positively with temperature, moisture-related climatic indices are expected to be suitable parameters to explain the variations in tree-ring oxygen isotopes.
direction: negative
fraction: 0.44
rank: 1
scope: climate
seasonality: Jun-Sep
variable: effectivePrecipitation
variableDetail: soil PDSI conditions
variableGroup: PDSI
basis: In the monsoon season, high temperature usually indicates less rainfall and low relative humidity, which can make the tree ring cellulose d18O heavier. Low PDSI indicates a dry condition.
direction: negative
inferredMaterial: leaf water d18O
integrationTime: a year
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: Jun-Sep
seasonalityOriginal: June-September
variable: effectivePrecipitation
variableDetail: isotopic composition of summer rainfall
variableGroup: EffectiveMoisture
variableGroupDirection: negative
variableGroupOriginal: P_E
scope: isotope
seasonalityOriginal: June-September
variableOriginal: Precipitation_amount
scope: isotope
seasonalityOriginal: June-September
root
pub
pub1
geo
PaleoData columns
year (yr AD)
interpretation
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d18O (permil)
interpretation
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