Peak intervals of equatorial Pacific export production during the middle Miocene climate transition
| Autor: | Donald E. Penman, Samantha C. Carter, Elizabeth M. Griffith |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Ocean current Climate change Antarctic ice sheet Geology 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Carbon cycle Foraminifera Oceanography Isotopes of carbon Upwelling Glacial period 0105 earth and related environmental sciences |
| Zdroj: | Geology. 44:923-926 |
| ISSN: | 1943-2682 0091-7613 |
| Popis: | The middle Miocene climate transition (MMCT) is characterized by an abrupt 1‰ increase in benthic foraminiferal oxygen isotopes at ca. 13.8 Ma, marking expansion of the Antarctic Ice Sheet and transition of Earth9s climate to a cooler, relatively stable glacial state. Also occurring during this period is a globally recognized positive carbon isotope excursion (16.9–13.5 Ma) in benthic and planktonic foraminifera with shorter carbon isotope maxima (CM) events, linking hypotheses for climate change at the time with the carbon cycle. In order to test whether export production in the eastern equatorial Pacific is related to the largest such event (CM6), coincident with Antarctic Ice Sheet expansion, a high-resolution ( |
| Databáze: | OpenAIRE |
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