| Title: |
Using ice core measurements from Taylor Glacier, Antarctica, to calibrate in situ cosmogenic 14C production rates by muons |
| Authors: |
Dyonisius, Michael N.; Petrenko, Vasilii V.; Smith, Andrew M.; Hmiel, Benjamin; Neff, Peter D.; Yang, Bin; Hua, Quan; Schmitt, Jochen; Shackleton, Sarah A.; Buizert, Christo; Place, Philip F.; Menking, James A.; Beaudette, Ross; Harth, Christina; Kalk, Michael; Roop, Heidi A.; Bereiter, Bernhard; Armanetti, Casey; Vimont, Isaac; Englund Michel, Sylvia; Brook, Edward J.; Severinghaus, Jeffrey P.; Weiss, Ray F.; McConnell, Joseph R. |
| Publisher Information: |
Copernicus Publications |
| Publication Year: |
2023 |
| Collection: |
Niedersächsisches Online-Archiv NOA (Gottfried Wilhelm Leibniz Bibliothek Hannover) |
| Subject Terms: |
article; Verlagsveröffentlichung |
| Description: |
Cosmic rays entering the Earth's atmosphere produce showers of secondary particles such as protons, neutrons, and muons. The interaction of these particles with oxygen-16 (16O) in minerals such as ice and quartz can produce carbon-14 (14C). In glacial ice, 14C is also incorporated through trapping of 14C-containing atmospheric gases (14CO2, 14CO, and 14CH4). Understanding the production rates of in situ cosmogenic 14C is important to deconvolve the in situ cosmogenic and atmospheric 14C signals in ice, both of which contain valuable paleoenvironmental information. Unfortunately, the in situ 14C production rates by muons (which are the dominant production mechanism at depths of >6 m solid ice equivalent) are uncertain. In this study, we use measurements of in situ 14C in ancient ice (>50 ka) from the Taylor Glacier, an ablation site in Antarctica, in combination with a 2D ice flow model to better constrain the compound-specific rates of 14C production by muons and the partitioning of in situ 14C between CO2, CO, and CH4. Our measurements show that 33.7 % (±11.4 %; 95 % confidence interval) of the produced cosmogenic 14C forms 14CO and 66.1 % (±11.5 %; 95 % confidence interval) of the produced cosmogenic 14C forms 14CO2. 14CH4 represents a very small fraction ( |
| Document Type: |
article in journal/newspaper |
| File Description: |
electronic |
| Language: |
English |
| Relation: |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424; https://noa.gwlb.de/receive/cop_mods_00065093 |
| DOI: |
10.5194/tc-17-843-2023 |
| Availability: |
https://doi.org/10.5194/tc-17-843-2023; https://noa.gwlb.de/receive/cop_mods_00065093; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063714/tc-17-843-2023.pdf; https://tc.copernicus.org/articles/17/843/2023/tc-17-843-2023.pdf |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; uneingeschränkt ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.DFC4D7C8 |
| Database: |
BASE |