Measurement of Atmospheric He/N2 (Helium to Nitrogen) Ratio as a Tracer of Stratospheric-Tropospheric Exchange

测量大气 He/N2(氦气与氮气)比率作为平流层-对流层交换的示踪剂

基本信息

项目摘要

This project supports the development of new instrumentation to measure very precisely the ratio of the concentration of helium (He) to nitrogen (N2) in the atmosphere. Measurements of this ratio will be used to evaluate the exchange of atmospheric constituents between the stratosphere (the layer of the atmosphere just above the troposphere) and the troposphere, the lowest portion of the atmosphere closest to the Earth's surface. Better understanding of stratospheric-tropospheric exchange (STE) is important for increasing general knowledge about the atmosphere and improving models that predict weather and climate.The newly developed instrumentation will be used to: (1) measure long-term trends in He/N2 as recorded in the Scripps Institute of Oceanography archive of high pressure gas cylinders of air that extends back to the 1970s; (2) conduct real-time measurements of He/N2 for a period spanning one year at La Jolla, where stratospheric influences are expected in association with Santa Anna wind events; and (3) test new methods to allow He/N2 ratios to be measured in flask samples. Modeling studies will be used to assess the expected stratospheric influences on the He/N2 ratio. This project is expected to provide the first estimates of seasonal and synoptic variations in the He/N2 ratio. This effort will also improve the ability of Ar/N2 measurements to serve as a constraint on ocean warming. The new technique will be used to advance the understanding of stratospheric circulation and the resulting implications for tropospheric chemistry, and ultimately, by assessing the sources of these compounds, to attain a better understanding of the effects of human activities on the atmosphere.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
该项目支持开发新的仪器,以非常精确地测量大气中氦(He)与氮(N2)的浓度之比。对这一比率的测量将用于评估平流层(对流层上方的大气层)和对流层(最接近地球表面的大气层的最低部分)之间的大气成分交换。更好地了解平流层-对流层交换(STE)对于增加关于大气的一般知识和改进预测天气和气候的模式非常重要。新开发的仪器将用于:(1)测量斯克里普斯海洋研究所高压气瓶档案中记录的He/N2的长期趋势,该档案可追溯到20世纪70年代;(2)在La Jolla进行为期一年的He/N2实时测量,在那里预计与Santa Anna风事件相关的平流层影响;(3)测试新方法,以允许在烧瓶样品中测量He/N2比率。模拟研究将用于评估预期的平流层对He/N2比率的影响。该项目预计将首次提供He/N2比值的季节和天气变化估计。这一努力还将提高测量Ar/N2的能力,以限制海洋变暖。这项新技术将用于增进对平流层环流的了解及其对对流层化学的影响,并最终通过评估这些化合物的来源来更好地了解人类活动对大气的影响。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

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)
Increasing atmospheric helium due to fossil fuel exploitation
由于化石燃料的开采,大气中的氦气不断增加
  • DOI:
    10.1038/s41561-022-00932-3
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    18.3
  • 作者:
    Birner, Benjamin;Severinghaus, Jeffrey;Paplawsky, Bill;Keeling, Ralph F.
  • 通讯作者:
    Keeling, Ralph F.
Short-term variability of atmospheric helium revealed through a cryo-enrichment method
通过低温浓缩方法揭示大气氦的短期变化
  • DOI:
    10.5194/amt-16-1551-2023
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    3.8
  • 作者:
    Birner, Benjamin;Morgan, Eric;Keeling, Ralph F.
  • 通讯作者:
    Keeling, Ralph F.
A method for resolving changes in atmospheric He ∕ N<sub>2</sub> as an indicator of fossil fuel extraction and stratospheric circulation
一种解决大气 He-N<sub>2</sub> 变化的方法,作为化石燃料提取和平流层环流的指标
  • DOI:
    10.5194/amt-14-2515-2021
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    3.8
  • 作者:
    Birner, Benjamin;Paplawsky, William;Severinghaus, Jeffrey;Keeling, Ralph F.
  • 通讯作者:
    Keeling, Ralph F.
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Ralph Keeling其他文献

Recent and future trends in atmospheric radiocarbon
大气放射性碳的近期和未来趋势
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Heather Graven;Ryo Fujita;Ralph Keeling;Samar Khatiwala;Joeri Rogelj;Xiaomei Xu
  • 通讯作者:
    Xiaomei Xu
Seasonal CO2 amplitude in northern high latitudes
北半球高纬度地区的季节性二氧化碳振幅
  • DOI:
    10.1038/s43017-024-00600-7
  • 发表时间:
    2024-10-31
  • 期刊:
  • 影响因子:
    71.500
  • 作者:
    Zhihua Liu;Brendan M. Rogers;Gretchen Keppel-Aleks;Manuel Helbig;Ashley P. Ballantyne;John S. Kimball;Abhishek Chatterjee;Adrianna Foster;Aleya Kaushik;Anna-Maria Virkkala;Arden L. Burrell;Christopher Schwalm;Colm Sweeney;Edward A. G. Schuur;Jacqueline Dean;Jennifer D. Watts;Jinhyuk E. Kim;Jonathan A. Wang;Lei Hu;Lisa Welp;Logan T. Berner;Marguerite Mauritz;Michelle Mack;Nicholas C. Parazoo;Nima Madani;Ralph Keeling;Roisin Commane;Scott Goetz;Shilong Piao;Susan M. Natali;Wenjuan Wang;Wolfgang Buermann;Xanthe Walker;Xin Lin;Xuhui Wang;Yuming Jin;Kailiang Yu;Yangjian Zhang
  • 通讯作者:
    Yangjian Zhang
nitial Results of an Intercomparison of AMS-Based Atmoshperic14CO2 Measurements.
基于 AMS 的 Atmoshperic14CO2 测量结果相互比较的初步结果。
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    8.3
  • 作者:
    John Miller;Scott Lehman;Chad Wolak;Jocelyn Turnbull;Gregory Dunn;Heather Graven;Ralph Keeling;Harro A J Meijer;Anita Th Aerts-Bijma;7名略, Toshio Nakamura;6名略
  • 通讯作者:
    6名略

Ralph Keeling的其他文献

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{{ truncateString('Ralph Keeling', 18)}}的其他基金

Collaborative Research: Arctic time series measurements of atmospheric O2/N2 ratio, CO2 concentration, and CO2 isotopes in relation to changing carbon cycling and biogeochemistry
合作研究:大气 O2/N2 比率、CO2 浓度和 CO2 同位素与碳循环和生物地球化学变化相关的北极时间序列测量
  • 批准号:
    1922922
  • 财政年份:
    2020
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
Collaborative Research: Measuring Carbon and Climate Tracers on the Atom Airborne Campaigns
合作研究:测量原子机载运动中的碳和气候示踪剂
  • 批准号:
    1623748
  • 财政年份:
    2016
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
RAPID: Collaborative Research: Flask and in Situ Measurements of Carbon and Climate Tracers on ATom-1
RAPID:合作研究:ATom-1 上碳和气候示踪剂的烧瓶和原位测量
  • 批准号:
    1547797
  • 财政年份:
    2015
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
Collaborative Research: The O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) Study
合作研究:O2/N2 比率和二氧化碳机载南大洋 (ORCAS) 研究
  • 批准号:
    1502301
  • 财政年份:
    2015
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
MRI: Acquisition of High Precision Laser-based CO2 Isotope Analysis System for Atmospheric and Seawater Applications
MRI:获取用于大气和海水应用的高精度激光 CO2 同位素分析系统
  • 批准号:
    1429552
  • 财政年份:
    2014
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
Collaborative Research: Atmospheric measurements of O2/N2 ratio, CO2 concentration, and CO2 isotopes in support of the Arctic Observing Network
合作研究:O2/N2 比率、CO2 浓度和 CO2 同位素的大气测量,支持北极观测网络
  • 批准号:
    1304270
  • 财政年份:
    2014
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Continuing Grant
Testing model estimates of recent ocean carbon uptake and deoxygenation using atmospheric and oceanic data
使用大气和海洋数据测试近期海洋碳吸收和脱氧的模型估计
  • 批准号:
    1130976
  • 财政年份:
    2011
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Continuing Grant
The Data Legacy of the Scripps Carbon Dioxide Program
斯克里普斯二氧化碳计划的数据遗产
  • 批准号:
    1036399
  • 财政年份:
    2010
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant
Collaborative Research: HIAPER Pole-to-Pole Observations (HIPPO) of Carbon Cycle and Greenhouse Gases
合作研究:碳循环和温室气体的 HIAPER 极地观测 (HIPPO)
  • 批准号:
    0628519
  • 财政年份:
    2007
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Continuing Grant
Atmospheric Constraints on Carbon Exchanges and Related Processes Based on Measurements of Atmospheric O2/N2 and Ar/N2 Ratios and CO2 Concentrations
基于大气 O2/N2 和 Ar/N2 比率以及 CO2 浓度测量的大气对碳交换和相关过程的约束
  • 批准号:
    0651834
  • 财政年份:
    2007
  • 资助金额:
    $ 52.88万
  • 项目类别:
    Standard Grant

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合作研究:大气环流对二氧化碳 (CO2) 增加的响应的非线性和反馈
  • 批准号:
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  • 批准号:
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  • 批准号:
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用于大气化学和空间研究的太赫兹频率传感器(更新)
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  • 财政年份:
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EMBRACE-AGS-Seed: Decadal Trends of Atmospheric Ethane - Building Capacity for Trace Gas Analysis and Modeling at Portland State University
EMBRACE-AGS-Seed:大气乙烷的十年趋势 - 波特兰州立大学痕量气体分析和建模能力建设
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Evaluating the Atmospheric Dynamics of Nitrate and Sulfate in Southern New England in Response to Emission Regulations
评估新英格兰南部硝酸盐和硫酸盐的大气动态以响应排放法规
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Effect of Condensed-Phase Photochemistry on Absorption Coefficients and Phase State of Atmospheric Organic Aerosol Particles
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Collaborative Research: Characterizing Atmospheric Tropical-waves of the Lower Stratosphere with Reel-down Atmospheric Temperature Sensing for Strateole-2--RATS Chasing CATS!
合作研究:利用 Strateole-2 的卷轴大气温度传感来表征平流层下部的大气热带波——RATS 追逐 CATS!
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Facilities for Atmospheric Boundary Layer Evaluation and Testing
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