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Journal article
Circumpolar deep water upwelling is a primary source of 10Be in Antarctic continental shelf sediments
Global and Planetary Change, Vol.236, 104424
2024
Abstract
Beryllium-10 (10Be) has been proposed as a potential proxy for investigating ice shelf presence and absence, or meltwater discharge in coastal polar environments. However, the sources and distribution of atmospherically produced meteoric-10Be in the Antarctic marine realm are yet to be fully characterized, making any inferences about its concentration in sediments challenging. We present a dataset of 9Be and 10Be concentrations, and 10Be/9Be ratios in seafloor surface sediments from the Antarctic continental shelf - including from sub ice shelf cores - to assess the sources and processes contributing Be-isotopes to ice-sheet proximal marine settings. We show that upwelling waters (e.g. Circumpolar Deep Water) are a significant source of 10Be to continental shelf sediments. This limits the use of 10Be/9Be as a proxy for ice shelf environment or meltwater discharge, but instead provides a potential proxy for reconstructing Circumpolar Deep Water incursions onto Antarctic continental shelves.
Details
- Title
- Circumpolar deep water upwelling is a primary source of 10Be in Antarctic continental shelf sediments
- Authors/Creators
- Matthew R. JeromsonToshiyuki FujiokaDavid FinkKrista SimonJames SmithClaus-Dieter HillenbrandGerhard KuhnAlexandra PostTona Sanchez-Palacios (Author)Marcello BlaxellT. Gabriel EngeDuanne A. White
- Publication Details
- Global and Planetary Change, Vol.236, 104424
- Publisher
- Elsevier B.V.
- Identifiers
- 991005650570007891
- Copyright
- © 2024 Elsevier B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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