Collaborative Research: Quantifying past water table depth and hydroclimate with dissolved noble gas isotopes in groundwater

合作研究:利用地下水中溶解的惰性气体同位素量化过去的地下水位深度和水文气候

基本信息

项目摘要

Water resources are a critical issue for agriculture in the arid parts of the US, and it is likely that water availability will be affected by future climate change, yet it remains difficult to predict the magnitude of future rainfall changes. The proposed research will develop a new and precise method for quantifying past changes in water table depth, using measurements of dissolved noble gas isotopes in ancient groundwater. This knowledge of past water table fluctuations will help illuminate the regional rainfall response to climate variations, and strengthen predictions by providing rigorous tests of rainfall models. The method is based on the demonstrated fact that heavy gases settle to the bottom of the stagnant column of air in the soil above the water table depth. The deeper the water table, the more extreme the enrichment of heavy isotopes, and these heavy isotopes become dissolved in the water thus preserving information about the water table depth in aquifers containing ancient groundwater. This groundwater is already routinely sampled to learn about past temperature from the abundance of the noble gases; the proposed research will add water table depth to the information that can be extracted from the samples.
水资源是美国干旱地区农业的一个关键问题,水的可用性可能会受到未来气候变化的影响,但仍然很难预测未来降雨量变化的幅度。拟议的研究将开发一种新的精确方法,利用古代地下水中溶解的惰性气体同位素的测量来量化过去地下水位深度的变化。 过去地下水位波动的知识将有助于阐明区域降雨对气候变化的反应,并通过提供严格的降雨模型测试来加强预测。该方法是基于这样一个已证实的事实,即重气体沉降到地下水位深度以上土壤中的静止空气柱的底部。 地下水位越深,重同位素的富集程度越高,这些重同位素溶解在水中,从而保存了关于含有古代地下水的含水层的地下水位深度的信息。 已经对这种地下水进行了例行取样,以了解过去惰性气体丰度的温度;拟议的研究将增加地下水位深度,以增加可以从样本中提取的信息。

项目成果

期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Precise determination of Ar, Kr and Xe isotopic fractionation due to diffusion and dissolution in fresh water
精确测定淡水中由于扩散和溶解而引起的 Ar、Kr 和 Xe 同位素分馏
  • DOI:
    10.1016/j.epsl.2019.03.008
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Seltzer, Alan M.;Ng, Jessica;Severinghaus, Jeffrey P.
  • 通讯作者:
    Severinghaus, Jeffrey P.
Deglacial water-table decline in Southern California recorded by noble gas isotopes
  • DOI:
    10.1038/s41467-019-13693-2
  • 发表时间:
    2019-12-16
  • 期刊:
  • 影响因子:
    16.6
  • 作者:
    Seltzer, Alan M.;Ng, Jessica;Severinghaus, Jeffrey P.
  • 通讯作者:
    Severinghaus, Jeffrey P.
Steady state fractionation of heavy noble gas isotopes in a deep unsaturated zone: UZ NOBLE GAS ISOTOPIC FRACTIONATION
深层不饱和区重惰性气体同位素的稳态分馏:UZ 稀有气体同位素分馏
  • DOI:
    10.1002/2016wr019655
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    5.4
  • 作者:
    Seltzer, Alan M.;Severinghaus, Jeffrey P.;Andraski, Brian J.;Stonestrom, David A.
  • 通讯作者:
    Stonestrom, David A.
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Jeffrey Severinghaus其他文献

Rebuttal of Sweatman, Powell, and West's “Rejection of Holliday et al.'s alleged refutation of the Younger Dryas Impact Hypothesis”
  • DOI:
    10.1016/j.earscirev.2024.104961
  • 发表时间:
    2024-11-01
  • 期刊:
  • 影响因子:
  • 作者:
    Vance.T. Holliday;Tyrone L. Daulton;Patrick J. Bartlein;Mark B. Boslough;Ryan P. Breslawski;Abigail E. Fisher;Ian A. Jorgeson;Andrew C. Scott;Christian Koeberl;Jennifer R. Marlon;Jeffrey Severinghaus;Michail I. Petaev;Philippe Claeys
  • 通讯作者:
    Philippe Claeys

Jeffrey Severinghaus的其他文献

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{{ truncateString('Jeffrey Severinghaus', 18)}}的其他基金

Collaborative Research: Using New Ice Cores from Dome C to Test the Assumption of a Constant Galactic Cosmic Ray Flux and Improve Understanding of the Holocene Methane Budget
合作研究:利用 Dome C 的新冰芯测试银河系宇宙射线通量恒定的假设并提高对全新世甲烷收支的理解
  • 批准号:
    2146134
  • 财政年份:
    2023
  • 资助金额:
    $ 35.15万
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    Standard Grant
Collaborative Research: REU: Calibrating the Water Isotope Thermometer in Antarctica Using Abrupt Heinrich Event Signatures in the EDML Ice Core
合作研究:REU:利用 EDML 冰芯中的突变海因里希事件特征校准南极洲的水同位素温度计
  • 批准号:
    2315927
  • 财政年份:
    2023
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Continuing Grant
Collaborative Research: Novel constraints on air-sea gas exchange and deep ocean ventilation from high-precision noble gas isotope measurements in seawater
合作研究:海水中高精度稀有气体同位素测量对海气交换和深海通风的新限制
  • 批准号:
    1924394
  • 财政年份:
    2019
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Standard Grant
MRI: Development of an Ultra-High-Precision Gas Mass Spectrometer
MRI:超高精度气体质谱仪的开发
  • 批准号:
    1920369
  • 财政年份:
    2019
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Standard Grant
Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability
合作研究:重建南极洲 Law Dome 大气一氧化碳的碳 14 以限制长期羟基自由基变化
  • 批准号:
    1643664
  • 财政年份:
    2018
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Continuing Grant
Collaborative Research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area
合作研究:艾伦山蓝冰区早更新世和中更新世气候和大气成分的快照
  • 批准号:
    1744832
  • 财政年份:
    2018
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Continuing Grant
Rapid Access Ice Drill (RAID) Science Workshop
快速冰钻 (RAID) 科学研讨会
  • 批准号:
    1719246
  • 财政年份:
    2016
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Standard Grant
Collaborative Research: Kr-86 as a Proxy for Barometric Pressure Variability and Movement of the SH Westerlies during the last Deglaciation
合作研究:Kr-86 作为上次冰消期期间南半球西风带气压变化和运动的代理
  • 批准号:
    1543229
  • 财政年份:
    2016
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Standard Grant
Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core
合作研究:整个南极深冰芯基于惰性气体和甲烷的气候记录
  • 批准号:
    1443710
  • 财政年份:
    2015
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Continuing Grant
Collaborative Research: Phase 2 Development of A Rapid Access Ice Drilling (RAID) Platform for Research in Antarctica
合作研究:用于南极洲研究的快速钻冰 (RAID) 平台的第二阶段开发
  • 批准号:
    1419979
  • 财政年份:
    2014
  • 资助金额:
    $ 35.15万
  • 项目类别:
    Standard Grant

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