Organic Compounds in a Sub-Antarctic Ice Core: A Potential Suite of Sea Ice Markers.
Geophysical research letters
American Geophysical Union (AGU)
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King, A., Thomas, E., Pedro, J., Markle, B., Potocki, M., Jackson, S., Wolff, E., & et al. (2019). Organic Compounds in a Sub-Antarctic Ice Core: A Potential Suite of Sea Ice Markers.. Geophysical research letters, 46 (16), 9930-9939. https://doi.org/10.1029/2019GL084249
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.
Royal Society (RP\R\180003)
European Research Council (279405)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (792746)
External DOI: https://doi.org/10.1029/2019GL084249
This record's URL: https://www.repository.cam.ac.uk/handle/1810/296209
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/