دورية أكاديمية
Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene–Oligocene boundary
| العنوان: | Fossil plant stomata indicate decreasing atmospheric CO2 prior to the Eocene–Oligocene boundary |
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| المؤلفون: | M. Steinthorsdottir, A. S. Porter, A. Holohan, L. Kunzmann, M. Collinson, J. C. McElwain |
| المصدر: | Climate of the Past, Vol 12, Iss 2, Pp 439-454 (2016) |
| بيانات النشر: | Copernicus Publications, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Environmental pollution LCC:Environmental protection LCC:Environmental sciences |
| مصطلحات موضوعية: | Environmental pollution, TD172-193.5, Environmental protection, TD169-171.8, Environmental sciences, GE1-350 |
| الوصف: | 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. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1814-9324 1814-9332 |
| Relation: | http://www.clim-past.net/12/439/2016/cp-12-439-2016.pdf; https://doaj.org/toc/1814-9324; https://doaj.org/toc/1814-9332 |
| DOI: | 10.5194/cp-12-439-2016 |
| URL الوصول: | https://doaj.org/article/5256d45bfc984d5a8714cd66de13ac9e |
| رقم الأكسشن: | edsdoj.5256d45bfc984d5a8714cd66de13ac9e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 18149324 18149332 |
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| DOI: | 10.5194/cp-12-439-2016 |