Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1619240114 |
Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis | |
Keeling, Ralph F.1; Graven, Heather D.2,3; Welp, Lisa R.4; Resplandy, Laure1; Bi, Jian1; Piper, Stephen C.1; Sun, Ying5; Bollenbacher, Alane1; Meijer, Harro A. J.6 | |
2017-09-26 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:39页码:10361-10366 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Netherlands |
英文摘要 | A decrease in the C-13/C-12 ratio of atmospheric CO2 has been documented by direct observations since 1978 and from ice core measurements since the industrial revolution. This decrease, known as the C-13-Suess effect, is driven primarily by the input of fossil fuel-derived CO2 but is also sensitive to land and ocean carbon cycling and uptake. Using updated records, we show that no plausible combination of sources and sinks of CO2 from fossil fuel, land, and oceans can explain the observed C-13-Suess effect unless an increase has occurred in the C-13/C-12 isotopic discrimination of land photosynthesis. A trend toward greater discrimination under higher CO2 levels is broadly consistent with tree ring studies over the past century, with field and chamber experiments, and with geological records of C-3 plants at times of altered atmospheric CO2, but increasing discrimination has not previously been included in studies of long-term atmospheric 13C/12C measurements. We further show that the inferred discrimination increase of 0.014 +/- 0.007% ppm(-1) is largely explained by photorespiratory and mesophyll effects. This result implies that, at the global scale, land plants have regulated their stomatal conductance so as to allow the CO2 partial pressure within stomatal cavities and their intrinsic water use efficiency to increase in nearly constant proportion to the rise in atmospheric CO2 concentration. |
英文关键词 | carbon cycle photosynthesis isotope water use efficiency carbon-13 Suess effect |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411704000039 |
WOS关键词 | WATER-USE EFFICIENCY ; STOMATAL CONDUCTANCE ; CO2 ; DIOXIDE ; CLIMATE ; DELTA-C-13 ; TRENDS ; IMPACT ; RATIO ; CYCLE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/204791 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 2.Imperial Coll London, Dept Phys, London SW7 2AZ, England; 3.Imperial Coll London, Grantham Inst, London SW7 2AZ, England; 4.Purdue Univ, Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; 5.Cornell Univ, Sch Integrat Plant Sci, Ithaca, NY 14850 USA; 6.Univ Groningen, Ctr Isotope Res, NL-9747 AG Groningen, Netherlands |
推荐引用方式 GB/T 7714 | Keeling, Ralph F.,Graven, Heather D.,Welp, Lisa R.,et al. Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(39):10361-10366. |
APA | Keeling, Ralph F..,Graven, Heather D..,Welp, Lisa R..,Resplandy, Laure.,Bi, Jian.,...&Meijer, Harro A. J..(2017).Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(39),10361-10366. |
MLA | Keeling, Ralph F.,et al."Atmospheric evidence for a global secular increase in carbon isotopic discrimination of land photosynthesis".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.39(2017):10361-10366. |
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