Change search
ReferencesLink to record
Permanent link

Direct link
Abundant Early Palaeogene marine gas hydrates despite warm deep-ocean temperatures
Stockholm University, Faculty of Science, Department of Geological Sciences. Rice University, USA.
Show others and affiliations
Number of Authors: 6
2011 (English)In: Nature Geoscience, ISSN 1752-0894, E-ISSN 1752-0908, Vol. 4, 848-851 p.Article in journal (Refereed) Published
Abstract [en]

Abrupt periods of global warming between 57 and 50 million years ago—known as the Early Palaeogene hyperthermal events—were associated with the repeated injection of mas- sive amounts of carbon into the atmosphere1–4. The release of methane from the sea floor following the dissociation of gas hydrates is often invoked as a source5. However, seafloor temperatures before the events were at least 4–7 ◦ C higher than today1, which would have limited the area of sea floor suitable for hosting gas hydrates6,7. Palaeogene gas hydrate reservoirs may therefore not have been sufficient to provide a significant fraction of the carbon released. Here we use numer- ical simulations of gas hydrate accumulation8 at Palaeogene seafloor temperatures to show that near-present-day values of gas hydrates could have been hosted in the Palaeogene. Our simulations show that warmer temperatures during the Palaeogene would have enhanced the amount of organic carbon reaching the sea floor as well as the rate of methanogenesis. We find that under plausible temperature and pressure condi- tions, the abundance of gas hydrates would be similar or higher in the Palaeogene than at present. We conclude that methane hydrates could have been an important source of carbon during the Palaeogene hyperthermal events. 

Place, publisher, year, edition, pages
2011. Vol. 4, 848-851 p.
National Category
Earth and Related Environmental Sciences
Research subject
Marine Geoscience
URN: urn:nbn:se:su:diva-65259DOI: 10.1038/NGEO1301ISI: 000298153200014OAI: diva2:461955
Available from: 2013-01-21 Created: 2011-12-06 Last updated: 2015-11-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Dickens, Gerald R.
By organisation
Department of Geological Sciences
In the same journal
Nature Geoscience
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 13 hits
ReferencesLink to record
Permanent link

Direct link