Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaa1fe |
Abundant pre-industrial carbon detected in Canadian Arctic headwaters: implications for the permafrost carbon feedback | |
Dean, J. F.1,2; van der Velde, Y.2; Garnett, M. H.3; Dinsmore, K. J.4; Baxter, R.5; Lessels, J. S.6; Smith, P.7; Street, L. E.8; Subke, J-A1; Tetzlaff, D.6; Washbourne, I.1; Wookey, P. A.1; Billett, M. F.1 | |
2018-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Scotland; Netherlands; England |
英文摘要 | Mobilization of soil/sediment organic carbon into inland waters constitutes a substantial, but poorly-constrained, component of the global carbon cycle. Radiocarbon (C-14) analysis has proven a valuable tool in tracing the sources and fate of mobilized carbon, but aquatic C-14 studies in permafrost regions rarely detect 'old' carbon (assimilated from the atmosphere into plants and soil prior to AD1950). The emission of greenhouse gases derived from old carbon by aquatic systems may indicate that carbon sequestered prior to AD1950 is being destabilized, thus contributing to the 'permafrost carbon feedback' (PCF). Here, we measure directly the C-14 content of aquatic CO2, alongside dissolved organic carbon, in headwater systems of the western Canadian Arctic-the first such concurrent measurements in the Arctic. Age distribution analysis indicates that the age of mobilized aquatic carbon increased significantly during the 2014 snow-free season as the active layer deepened. This increase in age was more pronounced in DOC, rising from 101-228 years before sampling date (a 120%-125% increase) compared to CO2, which rose from 92-151 years before sampling date (a 59%-63% increase). 'Pre-industrial' aged carbon (assimilated prior to similar to AD1750) comprised 15%-40% of the total aquatic carbon fluxes, demonstrating the prevalence of old carbon to Arctic headwaters. Although the presence of this old carbon is not necessarily indicative of a net positive PCF, we provide an approach and baseline data which can be used for future assessment of the PCF. |
英文关键词 | carbon dioxide CO2 dissolved organic carbon DOC methane CH4 Arctic catchments inland waters radiocarbon C-14 |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426339900001 |
WOS关键词 | DISSOLVED INORGANIC CARBON ; ORGANIC-CARBON ; ACTIVE LAYER ; METHANE ; RADIOCARBON ; LAKES ; PEATLANDS ; DIOXIDE ; THAW ; COLLECTION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26070 |
专题 | 气候变化 |
作者单位 | 1.Univ Stirling, Biol & Environm Sci, Stirling FK9 4LA, Scotland; 2.Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands; 3.NERC Radiocarbon Facil, E Kilbride G75 0QF, Lanark, Scotland; 4.Ctr Ecol & Hydrol, Penicuik EH26 0QB, Midlothian, Scotland; 5.Univ Durham, Dept Biosci, Durham DH1 3LE, England; 6.Univ Aberdeen, Northern Rivers Inst, Aberdeen AB24 3UF, Scotland; 7.Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen AB24 3UU, Scotland; 8.Univ Edinburgh, Sch Geosci, Edinburgh EH9 3FF, Midlothian, Scotland |
推荐引用方式 GB/T 7714 | Dean, J. F.,van der Velde, Y.,Garnett, M. H.,et al. Abundant pre-industrial carbon detected in Canadian Arctic headwaters: implications for the permafrost carbon feedback[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(3). |
APA | Dean, J. F..,van der Velde, Y..,Garnett, M. H..,Dinsmore, K. J..,Baxter, R..,...&Billett, M. F..(2018).Abundant pre-industrial carbon detected in Canadian Arctic headwaters: implications for the permafrost carbon feedback.ENVIRONMENTAL RESEARCH LETTERS,13(3). |
MLA | Dean, J. F.,et al."Abundant pre-industrial carbon detected in Canadian Arctic headwaters: implications for the permafrost carbon feedback".ENVIRONMENTAL RESEARCH LETTERS 13.3(2018). |
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