In search of in-situ radiocarbon in Law Dome ice and firn

Simple item page
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorLevchenko, VAen_AU
dc.contributor.authorEtheridge, DMen_AU
dc.contributor.authorLowe, DCen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorTrudinger, CMen_AU
dc.contributor.authorZoppi, Uen_AU
dc.contributor.authorElcheikh, Aen_AU
dc.date.accessioned2021-06-30T23:25:15Zen_AU
dc.date.available2021-06-30T23:25:15Zen_AU
dc.date.issued2000-10-01en_AU
dc.date.statistics2021-06-30en_AU
dc.description.abstractResults of AMS radiocarbon measurements on CO and CO2 separated from firn air directly pumped from the ice sheet, and on CO2 separated from air extracted from ice cores by a dry grating technique, are presented. The firn air samples and ice cores used in this study were collected from the region of Law Dome, Antarctica. No evidence of in-situ 14CO2 was found in the firn air samples or the ice core air samples from one site although a slight enhancement of 14CO above expected polar atmospheric concentrations was observed for some firn air samples. A clear in-situ 14CO2 signal for ice pre-dating the radiocarbon bomb pulse was found, however, in air samples extracted from an ice core from a second site. We compare these results and propose an hypothesis to explain this apparent contradiction. The degree to which in-situ 14C is released from the ice crystals during trapping and bubble formation is considered and discussed. The selectivity of the dry grating technique for the extraction of trapped atmospheric gases from ice cores is also discussed and compared with other methods. © 2000 Elsevier Science B.Ven_AU
dc.identifier.citationSmith, A. M., Levchenko, V. A., Etheridge, D. M., Lowe, D. C., Hua, Q., Trudinger, C. M., Zoppi, U. & Elcheikh, A. (2000). In search of in-situ radiocarbon in Law Dome ice and firn. Presented at the 8th International Conference on Accelerator Mass Spectrometry (AMS-8), 6-10 September, Vienna, Austria 1999. In Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 172(1-4), 610-622. doi:10.1016/S0168-583X(00)00280-9en_AU
dc.identifier.conferenceenddate10 September 1999en_AU
dc.identifier.conferencenamePresented at the 8th International Conference on Accelerator Mass Spectrometry (AMS-8)en_AU
dc.identifier.conferenceplaceVienna, Austria.en_AU
dc.identifier.conferencestartdate6 September 1999en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue1-4en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination610-622en_AU
dc.identifier.urihttps://doi.org/10.1016/S0168-583X(00)00280-9en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11012en_AU
dc.identifier.volume172en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCarbon 14en_AU
dc.subjectCarbon dioxideen_AU
dc.subjectCarbon monoxideen_AU
dc.subjectIceen_AU
dc.subjectAntarcticaen_AU
dc.subjectAntarctic regionsen_AU
dc.subjectMass spectroscopyen_AU
dc.titleIn search of in-situ radiocarbon in Law Dome ice and firnen_AU
dc.typeConference paperen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications