The Carbon Balance of Arctic Tundra in Response to Permafrost Thawing: Using Radiocarbon to Detect the Loss of Old Soil Carbon

北极苔原对永久冻土融化的碳平衡:利用放射性碳检测旧土壤碳的损失

基本信息

  • 批准号:
    0516326
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-09-01 至 2009-08-31
  • 项目状态:
    已结题

项目摘要

ABSTRACTUp to 450 billion tons of soil carbon has accumulated in high latitude ecosystems after theretreat of the last major ice sheets. Recent studies suggest that these ecosystems may no longerbe accumulating carbon in soils, and in some cases may be losing stored carbon to theatmosphere. This study will use measurements of radiocarbon isotopes to ask the question: Is oldcarbon that comprises the bulk of the soil organic matter pool released in response to thawing ofpermafrost? Field measurements will center on a site in Alaska where permafrost has beenobserved to warm and melt over the past several decades. This area is unique for addressingquestions at the time scales relevant for change in arctic ecosystems.This project has broad significance for changes in the global carbon cycle. Transfer of carbonnow stored in waterlogged and frozen soils to the atmosphere could cause a significant positivefeedback to climate change due to the large size and potential reactivity of this carbon reservoir.In addition to the measurement program, this project will support an experienced journalist tospend time in the field each year as a consultant to the project. She will interface with scientistsand communicate the results of the research by producing stories for various public radio andprint outlets. These stories will share the research questions and implications of this project witha broad-based, lay audience.
在最后一次大冰原消融之后,高纬度生态系统中已经积累了高达4500亿吨的土壤碳。最近的研究表明,这些生态系统可能不再在土壤中积累碳,在某些情况下,可能会将储存的碳流失到大气中。这项研究将使用放射性碳同位素的测量来问一个问题:构成土壤有机质库的大部分的老碳是否因冻土融化而释放?实地测量将集中在阿拉斯加的一个地点,那里的永久冻土在过去几十年里一直在变暖和融化。这一领域在解决与北极生态系统变化相关的时间尺度上的问题方面是独一无二的。这一项目对全球碳循环的变化具有广泛意义。由于碳库的巨大规模和潜在的反应性,储存在积水和冻土中的碳现在转移到大气中可能会对气候变化产生显著的正反馈。除了测量计划外,该项目还将支持一名经验丰富的记者每年作为该项目的顾问在实地工作。她将与科学家交流,并通过为各种公共广播和印刷媒体制作故事来传达研究结果。这些故事将与广泛的非专业观众分享这个项目的研究问题和影响。

项目成果

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Edward Schuur其他文献

Edward Schuur的其他文献

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{{ truncateString('Edward Schuur', 18)}}的其他基金

LTREB Renewal: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
LTREB 更新:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化后果造成的旧碳损失
  • 批准号:
    2309467
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Doctoral Dissertation Research: The impact of permafrost thaw on the fate and magnitude of carbon aquatic transport from Arctic tundra soil
博士论文研究:永久冻土融化对北极苔原土壤碳水运输的命运和程度的影响
  • 批准号:
    2310630
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
MRI: Acquisition of equipment for an integrated gas analysis and labeling radiocarbon system with a focus on Arctic carbon and geochronology
MRI:采购集成气体分析和标记放射性碳系统的设备,重点关注北极碳和地质年代学
  • 批准号:
    1919506
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Permafrost Carbon Network: Synthesizing flux observations for benchmarking model projections of permafrost carbon exchange
合作研究:永久冻土碳网络:综合通量观测结果以用于永久冻土碳交换的基准模型预测
  • 批准号:
    1931333
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
NNA: LTREB: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
NNA:LTREB:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化造成的旧碳损失
  • 批准号:
    1754839
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Carbon Cycle Changes in a Changing Climate: Using 13C and 14C to Partition Ecosystem Respiration in Tundra Undergoing Permafrost Thaw
论文研究:气候变化中的碳循环变化:利用 13C 和 14C 来划分永久冻土解冻苔原中的生态系统呼吸
  • 批准号:
    1011284
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: RCN: Vulnerability of Permafrost Carbon
合作研究:RCN:永久冻土碳的脆弱性
  • 批准号:
    0955713
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
DISSERTATION RESEARCH: Tracking Ecosystem Nitrogen Cycling in Black Spruce Forests with Novel15N Measurements
论文研究:利用新颖的 15N 测量追踪黑云杉森林的生态系统氮循环
  • 批准号:
    0909764
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
CAREER: Experimental Warming, Permafrost Thawing, and the Loss of Old Carbon from Tundra: Radiocarbon Research and Education to Understand Ecosystem Feedbacks to Climate Change
职业:实验变暖、永久冻土融化和苔原旧碳的流失:放射性碳研究和教育,以了解生态系统对气候变化的反馈
  • 批准号:
    0747195
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Collaborative Research: Climate controls over ecosystem respiration: Using isotopes to determine the sources and age of respired carbon
合作研究:气候对生态系统呼吸的控制:利用同位素确定呼吸碳的来源和年龄
  • 批准号:
    0223193
  • 财政年份:
    2002
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

相似海外基金

LTREB Renewal: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
LTREB 更新:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化后果造成的旧碳损失
  • 批准号:
    2309467
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Collaborative Research: Tracking Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories in Alaska and Siberia
合作研究:阿拉斯加和西伯利亚旗舰天文台追踪北极景观的碳、水和能量平衡
  • 批准号:
    1936752
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Collaborative Research: Tracking Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories in Alaska and Siberia
合作研究:阿拉斯加和西伯利亚旗舰天文台追踪北极景观的碳、水和能量平衡
  • 批准号:
    1936769
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Multi-decadal year-round CO2 and CH4 fluxes to understand long-term impact of climate change on the Arctic carbon balance
多年的二氧化碳和甲烷通量,以了解气候变化对北极碳平衡的长期影响
  • 批准号:
    1932900
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Quantifying the carbon balance of Arctic watersheds
量化北极流域的碳平衡
  • 批准号:
    540464-2019
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    University Undergraduate Student Research Awards
NNA: LTREB: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
NNA:LTREB:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化造成的旧碳损失
  • 批准号:
    1754839
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories in Alaska and Siberia
合作研究:阿拉斯加和西伯利亚旗舰天文台北极景观的碳、水和能量平衡
  • 批准号:
    1503781
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories in Alaska and Siberia
合作研究:阿拉斯加和西伯利亚旗舰天文台北极景观的碳、水和能量平衡
  • 批准号:
    1503912
  • 财政年份:
    2016
  • 资助金额:
    --
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Collaborative Research: Carbon, Water, and Energy Balance of the Arctic Landscape at Flagship Observatories in Alaska and Siberia
合作研究:阿拉斯加和西伯利亚旗舰天文台北极景观的碳、水和能量平衡
  • 批准号:
    1504006
  • 财政年份:
    2016
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The Carbon Balance of Arctic River Deltas: Tundra Fire as an Agent of System Change
北极河三角洲的碳平衡:苔原火灾作为系统变化的推动者
  • 批准号:
    1561437
  • 财政年份:
    2015
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    --
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