The source and fate of massive carbon input during the latest Paleocene thermal maximum
tropical western North Atlantic) links a massive release of biogenic methane;55.5 million years ago to a warming of deep-ocean and high-latitude surface waters, a large perturbation in the combined ocean-atmosphere carbon cycle (the largest of the past 90 million years), a mass extinction event in b...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1999
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.1975 http://courses.washington.edu/ocean450/Discussion_Topics_Papers/Katz_et_al.pdf |
| Summary: | tropical western North Atlantic) links a massive release of biogenic methane;55.5 million years ago to a warming of deep-ocean and high-latitude surface waters, a large perturbation in the combined ocean-atmosphere carbon cycle (the largest of the past 90 million years), a mass extinction event in benthic faunas, and a radiation of mammalian orders. The deposition of a mud clast interval and seismic evidence for slope disturbance are associated with inter-mediate water warming, massive carbon input to the global exogenic carbon cycle, pelagic carbonate dissolution, a decrease in dissolved oxygen, and a benthic foraminiferal extinction event. These events provide evidence to con-Þrm the gas hydrate dissociation hypothesis and identify the Blake Nose as a site of methane release. Over a 10,000- to 20,000-year interval about 55.5 million years ago (1, 2), Earth’s climate and oceans warmed as deep-ocean and high-latitude surface water temperatures soared by 4 ° to 8°C (3–6), numerous mammalian or- |
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