| DOI: | 10.2172/1032487
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| 报告号: | DOE/ER64362 Final
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| 报告题名: | Study of the Role of Terrestrial Processes in the Carbon Cycle Based on Measurements of the Abundance and Isotopic Composition of Atmospheric CO2 |
| 作者: | Piper, Stephen C; Keeling, Ralph F
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| 出版年: | 2012
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| 发表日期: | 2012-01-03
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| 总页数: | 16
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | CO2
; atmospheric carbon dioxide
; carbon and oxygen isotopes of CO2
; global carbon cycle
; terrestrial biosphere
; fossil fuel emissions
; ocean carbon sources and sinks
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| 中文主题词: | 生物圈
; 碳
; 排放物
; 同位素
; 二氧化碳
; 氧
; 氧同位素
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| 主题词: | BIOSPHERE
; CARBON
; EMISSIONS
; ISOTOPES
; CARBON DIOXIDE
; OXYGEN
; OXYGEN ISOTOPES
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| 英文摘要: | The main objective of this project was to continue research to develop carbon cycle relationships related to the land biosphere based on remote measurements of atmospheric CO2 concentration and its isotopic ratios 13C/12C, 18O/16O, and 14C/12C. The project continued time-series observations of atmospheric carbon dioxide and isotopic composition begun by Charles D. Keeling at remote sites, including Mauna Loa, the South Pole, and eight other sites. Using models of varying complexity, the concentration and isotopic measurements were used to study long-term change in the interhemispheric gradients in CO2 and 13C/12C to assess the magnitude and evolution of the northern terrestrial carbon sink, to study the increase in amplitude of the seasonal cycle of CO2, to use isotopic data to refine constraints on large scale changes in isotopic fractionation which may be related to changes in stomatal conductance, and to motivate improvements in terrestrial carbon cycle models. The original proposal called for a continuation of the new time series of 14C measurements but subsequent descoping to meet budgetary constraints required termination of measurements in 2007. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1032487
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40771
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1032487.pdf（2994KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Piper, Stephen C,Keeling, Ralph F. Study of the Role of Terrestrial Processes in the Carbon Cycle Based on Measurements of the Abundance and Isotopic Composition of Atmospheric CO2. 2012-01-01.
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