globalchange  > 气候变化与战略
DOI: 10.5194/cp-12-439-2016
Scopus记录号: 2-s2.0-84959342543
论文题名:
Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene-Oligocene boundary
作者: Steinthorsdottir M.; Porter A.S.; Holohan A.; Kunzmann L.; Collinson M.; McElwain J.C.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期:2
起始页码: 439
结束页码: 454
语种: 英语
Scopus关键词: atmospheric chemistry ; carbon dioxide ; deciduous tree ; Eocene-Oligocene boundary ; fossil record ; leaf ; low temperature ; marine isotope stage ; oxygen isotope ; paleoclimate ; snow accumulation ; stomata ; Antarctica ; Germany ; Fagaceae
英文摘要: A unique stratigraphic sequence of fossil leaves of Eotrigonobalanus furcinervis (extinct trees of the beech family, Fagaceae) from central Germany has been used to derive an atmospheric pCO2 record with multiple data points spanning the late middle to late Eocene, two sampling levels which may be earliest Oligocene, and two samples from later in the Oligocene. Using the inverse relationship between the density of stomata and pCO2, we show that pCO2 decreased continuously from the late middle to late Eocene, reaching a relatively stable low value before the end of the Eocene. Based on the subsequent records, pCO2 in parts of the Oligocene was similar to latest Eocene values. These results suggest that a decrease in pCO2 preceded the large shift in marine oxygen isotope records that characterizes the Eocene-Oligocene transition and that when a certain threshold of pCO2 change was crossed, the cumulative effects of this and other factors resulted in rapid temperature decline, ice build up on Antarctica and hence a change of climate mode. © Author(s) 2016.
资助项目: SFI, Science Foundation Ireland ; ERC, Science Foundation Ireland
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49054
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Recommended Citation:
Steinthorsdottir M.,Porter A.S.,Holohan A.,et al. Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene-Oligocene boundary[J]. Climate of the Past,2016-01-01,12(2)
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