Acquisition of High-Precision Mass Spectrometers for Noble Gas Isotopes as Environmental Tracers

购置高精度稀有气体同位素质谱仪作为环境示踪剂

基本信息

项目摘要

This award provides support to extend the capability of the Noble Gas Isotope Laboratory at Scripps Institution of Oceanography to neon, krypton and xenon isotopes, with the purchase of two new mass spectrometers. One mass spectrometer will be dedicated to measurements of natural isotopic variations in krypton and xenon, which should reveal the thickness of past "convective zones" in polar firn, as well as improving temperature change estimates made from trapped air in ice. The second mass spectrometer will be specially designed to measure neon isotopes and neon/xenon ratios in dual-collector mode which will enable monitoring of this ratio in the atmosphere, which should rise due to current ocean warming and consequent outgassing. Past variations in atmospheric Kr/N2 and Xe/N2 from ice core gases will also provide an average-ocean-temperature estimate over the past million years due to the solubility differences in these gases. Neon isotopes will shed light on fractionation processes during bubble close-off in polar ice, as well as the mechanism of supersaturation in seawater and groundwater. Neon/argon ratios in seawater as a tracer of sea ice formation by brine rejection will also be explored. . The broader impacts of the proposed acquisition are that education and training will be enhanced since graduate students will be among the primary users of the equipment. Outreach activities involving polar ice cores and climate change will be enhanced. These facilities will be available widely to others at the Institution for collaborative projects and will enhance the capabilities of Scripps and position it for a leadership role in environmental noble gas geochemistry.
该合同提供支助,通过购买两台新的质谱仪,将斯克里普斯海洋学研究所惰性气体同位素实验室的能力扩大到氖、氪和氙同位素。一台质谱仪将专门用于测量氪和氙的天然同位素变化,这应该可以揭示极地积雪中过去“对流区”的厚度,并改进根据冰中滞留空气进行的温度变化估计。第二台质谱仪将专门设计用于测量双收集器模式下的氖同位素和氖/氙比率,这将能够监测大气中的这一比率,由于目前的海洋变暖和随后的释气,这一比率应该会上升。 由于这些气体的溶解度差异,来自冰芯气体的大气Kr/N2和Kr/N2的过去变化也将提供过去百万年的平均海洋温度估计。氖同位素将揭示极地冰中气泡闭合过程中的分馏过程,以及海水和地下水中过饱和的机制。还将探讨海水中的氖/氩比率作为盐水排斥形成海冰的示踪剂。 . 拟议采购的更广泛影响是,将加强教育和培训,因为研究生将是设备的主要用户。将加强涉及极地冰芯和气候变化的外联活动。这些设施将广泛提供给该研究所的其他机构用于合作项目,并将提高斯克里普斯的能力,使其在环境惰性气体地球化学方面发挥领导作用。

项目成果

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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:
    --
  • 项目类别:
    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:
    --
  • 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:
    --
  • 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:
    --
  • 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:
    --
  • 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:
    --
  • 项目类别:
    Continuing Grant
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
  • 批准号:
    1702704
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Standard 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:
    --
  • 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:
    --
  • 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:
    --
  • 项目类别:
    Continuing Grant

相似国自然基金

High-precision force-reflected bilateral teleoperation of multi-DOF hydraulic robotic manipulators
  • 批准号:
    52111530069
  • 批准年份:
    2021
  • 资助金额:
    10 万元
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    国际(地区)合作与交流项目

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