14CH4 measurements in Greenland ice: investigating last glacial termination CH4 sources

Simple item page
dc.contributor.authorPetrenko, VVen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorBrook, EJen_AU
dc.contributor.authorLowe, DCen_AU
dc.contributor.authorRiedel, Ken_AU
dc.contributor.authorBrailsford, Gen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorSchaefer, Hen_AU
dc.contributor.authorReeh, Nen_AU
dc.contributor.authorWeiss, RFen_AU
dc.contributor.authorEtheridge, DMen_AU
dc.contributor.authorSeveringhaus, JPen_AU
dc.date.accessioned2009-10-09T04:42:54Zen_AU
dc.date.accessioned2010-04-30T05:04:39Zen_AU
dc.date.available2009-10-09T04:42:54Zen_AU
dc.date.available2010-04-30T05:04:39Zen_AU
dc.date.issued2009-04-24en_AU
dc.date.statistics2009-04-24en_AU
dc.description.abstractThe cause of a large increase of atmospheric methane concentration during the Younger Dryas-Preboreal abrupt climatic transition (~11,600 years ago) has been the subject of much debate. The carbon-14 (14C) content of methane (14CH4) should distinguish between wetland and clathrate contributions to this increase. We present measurements of 14CH4 in glacial ice, targeting this transition, performed by using ice samples obtained from an ablation site in west Greenland. Measured 14CH4 values were higher than predicted under any scenario. Sample 14CH4 appears to be elevated by direct cosmogenic 14C production in ice. 14C of CO was measured to better understand this process and correct the sample 14CH4. Corrected results suggest that wetland sources were likely responsible for the majority of the Younger Dryas-Preboreal CH4 rise. © 2009, American Association for the Advancement of Science (AAAS)en_AU
dc.identifier.citationPetrenko, V. V., Smith, A. M., Brook, E. J., Lowe, D., Riedel, K., Brailsford, G., Huh, Q., Schaefer, H., Reeh, N., Weiss, R. F., Etheridge, D. M. & Severinghaus, J. P. (2009). 14CH4 measurements in Greenland ice: investigating last glacial termination CH4 sources. Science, 324(5926), 506-508. doi:10.1126/science.1168909en_AU
dc.identifier.govdoc1303en_AU
dc.identifier.issn0036-8075en_AU
dc.identifier.issue5926en_AU
dc.identifier.journaltitleScienceen_AU
dc.identifier.pagination506-508en_AU
dc.identifier.urihttp://dx.doi.org/10.1126/science.1168909en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1993en_AU
dc.identifier.volume324en_AU
dc.language.isoenen_AU
dc.publisherAmerican Association for the Advancement of Science (AAAS)en_AU
dc.subjectGreenlanden_AU
dc.subjectIceen_AU
dc.subjectMethaneen_AU
dc.subjectCarbon 14en_AU
dc.subjectClimatic changeen_AU
dc.subjectAir pollutionen_AU
dc.title14CH4 measurements in Greenland ice: investigating last glacial termination CH4 sourcesen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.79 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles