Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab3318 |
Negative carbon isotope excursions: an interpretive framework | |
Vervoort, P.1; Adloff, M.2; Greene, E.3; Turner, S. Kirtland1 | |
2019-08-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Numerous negative carbon isotope excursions (nCIEs) in the geologic record occurring over 10(4)-10(5) years are interpreted as episodes of massive carbon release. nCIEs help to illuminate the connection between past carbon cycling and climate variability. Theoretically, the size of a nCIE can be used to determine the mass of carbon released, provided that the carbon source is known or other environmental changes such as temperature or ocean pH can be constrained. A simple isotopic mass balance equation often serves as a first order estimate for the mass of carbon input, but this approach ignores the effects of negative carbon cycle-climate feedbacks. Here we show, using 432 earth system model simulations, that the mass of carbon release and associated environmental impacts for a nCIE of a given size and carbon source depend on the onset duration of that nCIE: the longer the nCIE onset duration, the greater the required carbon input in order to counterbalance the input of C-13-enriched carbon through carbonate compensation and weathering feedbacks. On timescales >10(3) years, these feedbacks remove carbon from the atmosphere so that the relative rise in atmospheric CO2 decreases with the nCIE onset duration. Consequently, the impacts on global temperature, surface ocean pH and saturation state are reduced if the nCIE has a long onset duration. The framework provided here demonstrates how constraints on the total nCIE duration and relative shape-together determining the onset duration-affect the interpretation of sedimentary nCIEs. Finally, we evaluate selected well-studied nCIEs, including the Eocene Thermal Maximum 2 (similar to 54 Ma), the Paleocene- Eocene Thermal Maximum (similar to 56 Ma), and the Aptian Oceanic Anoxic Event (similar to 120 Ma), in the context of our model-based framework and show how modeled environmental changes can be used to narrow down the most likely carbon emissions scenarios. |
英文关键词 | carbon cycle modeling negative carbon isotope excursions hyperthermals |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481867500002 |
WOS关键词 | OCEANIC ANOXIC EVENT ; SEA-SURFACE TEMPERATURES ; EOCENE THERMAL MAXIMUM ; HIGH-RESOLUTION ; METHANE HYDRATE ; C-13-C-12 RATIO ; LATE PALEOCENE ; DEEP-SEA ; RELEASE ; CLIMATE |
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/185575 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA; 2.Univ Bristol, Sch Geog Sci, Bristol BS1 1SS, Avon, England; 3.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England |
推荐引用方式 GB/T 7714 | Vervoort, P.,Adloff, M.,Greene, E.,et al. Negative carbon isotope excursions: an interpretive framework[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(8). |
APA | Vervoort, P.,Adloff, M.,Greene, E.,&Turner, S. Kirtland.(2019).Negative carbon isotope excursions: an interpretive framework.ENVIRONMENTAL RESEARCH LETTERS,14(8). |
MLA | Vervoort, P.,et al."Negative carbon isotope excursions: an interpretive framework".ENVIRONMENTAL RESEARCH LETTERS 14.8(2019). |
条目包含的文件 | 条目无相关文件。 |
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