Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 43, issue 2
Articles | Volume 43, issue 2
https://doi.org/10.5194/jm-43-269-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jm-43-269-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 43, issue 2
Research article
 | 
01 Aug 2024
Research article |  | 01 Aug 2024

Direct link between iceberg melt and diatom productivity demonstrated in Mid-Pliocene Amundsen Sea interglacial sediments

Heather Furlong and Reed Paul Scherer

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Cited articles

Abelmann, A., Gersonde, R., and Spiess, V.: Pliocene–Pleistocene paleoceanography in the Weddell Sea – siliceous microfossil evidence, Geological history of the polar oceans: Arctic versus Antarctic, in: Geological History of the Polar Oceans: Arctic Versus Antarctic, edited by: Bleil, U. and Thiede, J., Kluwer, Dordrecht, the Netherlands, 729–759, https://hdl.handle.net/10013/epic.10607 (last access: 29 July 2024), 1990. 
Armbrecht, L. H., Lowe, V., Escutia, C., Iwai, M., McKay, R., and Armand, L. K.: Variability in diatom and silicoflagellate assemblages during mid-Pliocene glacial-interglacial cycles determined in Hole U1361A of IODP Expedition 318, Antarctic Wilkes Land Margin, Mar. Micropaleontol., 139, 28–41, https://doi.org/10.1016/j.marmicro.2017.10.008, 2018. 
Bett, D. T., Bradley, A. T., Williams, C. R., Holland, P. R., Arthern, R. J., and Goldberg, D. N.: Coupled ice–ocean interactions during future retreat of West Antarctic ice streams in the Amundsen Sea sector, The Cryosphere, 18, 2653–2675, https://doi.org/10.5194/tc-18-2653-2024, 2024. 
Bonn, W. J., Gingele, F. X., Grobe, H., Mackensen, A., and Fütterer, D. K.: Palaeoproductivity at the Antarctic continental margin: opal and barium records for the last 400 ka, Palaeogeogr. Palaeoecol., 139, 195–211, https://doi.org/10.1016/S0031-0182(97)00144-2, 1998. 
Carter, S. C., Paytan, A., and Griffith, E. M.: Toward an improved understanding of the marine barium cycle and the application of marine barite as a paleoproductivity proxy, Minerals, 10, 421, https://doi.org/10.3390/min10050421, 2020. 
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Diatom assemblages are vital components of the Antarctic ecosystem and nutrient supply chain, and they are often utilized as paleoclimate proxies to better understand past climatic changes. We demonstrate enhanced diatom production and accumulation in the outer Amundsen Sea during a Mid-Pliocene interglacial that coincides with pulses of ice-rafted terrestrial debris, providing compelling evidence that iceberg calving seeds diatom productivity in the Southern Ocean.
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Advances in Antarctic chronology, paleoenvironment, and paleoclimate...