Archaeal membrane lipid-based paleothermometry for applications in polar oceans

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dc.contributor.authorFietz, Susanneen_ZA
dc.contributor.authorHo, Sze Lingen_ZA
dc.contributor.authorHuguet, Carmeen_ZA
dc.date.accessioned2022-02-15T07:41:20Z
dc.date.available2022-02-15T07:41:20Z
dc.date.issued2020-06
dc.descriptionCITATION: Fietz, S., Ho, S. L. & Huguet, C. 2020. Archaeal membrane lipid-based paleothermometry for applications in polar oceans. Oceanography, 33(2):104–114, doi:10.5670/oceanog.2020.207.en_ZA
dc.descriptionThe original publication is available at https://tos.orgen_ZA
dc.description.abstractTo establish whether ongoing climate change is outside the range of natural variability and a result of anthropogenic inputs, it is essential to reconstruct past oceanic and atmospheric temperatures for comparison with the modern world. Reconstructing past temperatures is a complex endeavor that employs indirect proxy indicators. Over the past two decades, promising paleothermometers have been developed that use isoprenoidal glycerol dialkyl glycerol tetraethers (isoGDGTs) from the membrane lipids of archaea preserved in marine sediments. These proxies are based on the observed relationship between lipid structure and temperature. As with all proxy indicators, observed relationships are often complex. Here, we focus on the application of isoGDGT paleotemperature proxies in the polar oceans, critical components of the global climate system. We discuss the application of and caveats regarding these archaeal membrane lipid-derived proxies and make recommendations to improve isoGDGT-derived polar ocean temperature reconstructions. We also review initial successes using hydroxylated (OH) isoGDGTs proxies in cold Arctic and Southern Ocean regions and recommend that multi-proxy approaches, including both hydroxylated and non-hydroxylated isoGDGTs, be used to contribute to the robustness of paleotemperature reconstructions.en_ZA
dc.description.versionPublisher's versionen_ZA
dc.format.extent11 pages : illustrations, mapsen_ZA
dc.identifier.citationFietz, S., Ho, S. L. & Huguet, C. 2020. Archaeal membrane lipid-based paleothermometry for applications in polar oceans. Oceanography, 33(2):104–114, doi:10.5670/oceanog.2020.207.en_ZA
dc.identifier.issn1042-8275 (online)
dc.identifier.otherdoi:10.5670/oceanog.2020.207
dc.identifier.urihttp://hdl.handle.net/10019.1/124160
dc.language.isoen_ZAen_ZA
dc.publisherThe Oceanography Societyen_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectPolar oceansen_ZA
dc.subjectReconstructing past temperaturesen_ZA
dc.subjectPaleothermometryen_ZA
dc.titleArchaeal membrane lipid-based paleothermometry for applications in polar oceansen_ZA
dc.typeArticleen_ZA
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