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Organic compounds in a sub-Antarctic ice core: a potential suite of sea ice markers

Citation

King, ACF and Thomas, ER and Pedro, JB and Markle, B and Potocki, M and Jackson, SL and Wolff, E and Kalberer, M, Organic compounds in a sub-Antarctic ice core: a potential suite of sea ice markers, Geophysical Research Letters, 46, (16) pp. 9930-9939. ISSN 0094-8276 (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1029/2019GL084249

Abstract

Investigation of organic compounds in ice cores can potentially unlock a wealth of new information in these climate archives. We present results from the first ever ice core drilled on sub‐Antarctic island Bouvet, representing a climatologically important but understudied region. We analyze a suite of novel and more familiar organic compounds in the ice core, alongside commonly measured ions. Methanesulfonic acid shows a significant, positive correlation to winter sea ice concentration, as does a fatty acid compound, oleic acid. Both may be sourced from spring phytoplankton blooms, which are larger following greater sea ice extent in the preceding winter. Oxalate, formate, and acetate are positively correlated to sea ice concentration in summer, but sources of these require further investigation. This study demonstrates the potential application of organic compounds from the marine biosphere in generating multiproxy sea ice records, which is critical in improving our understanding of past sea ice changes.

Item Details

Item Type:Refereed Article
Keywords:sea ice, ice core, organic chemistry, sub-Antarctic islands
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Organic Geochemistry
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
UTAS Author:Pedro, JB (Dr Joel Pedro)
ID Code:137186
Year Published:2019
Web of Science® Times Cited:1
Deposited By:Oceans and Cryosphere
Deposited On:2020-02-04
Last Modified:2020-05-26
Downloads:0

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