Articles | Volume 43, issue 2
https://doi.org/10.5194/jm-43-323-2024
https://doi.org/10.5194/jm-43-323-2024
Research article
 | 
15 Aug 2024
Research article |  | 15 Aug 2024

Population morphometrics of the Southern Ocean diatom Fragilariopsis kerguelensis related to sea surface temperature

Joseph A. Ruggiero, Reed P. Scherer, Joseph Mastro, Cesar G. Lopez, Marcus Angus, Evie Unger-Harquail, Olivia Quartz, Amy Leventer, and Claus-Dieter Hillenbrand

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Cited articles

Assmann, K. M., Hellmer, H. H., and Jacobs, S. S.: Amundsen Sea ice production and transport, J. Geophys. Res.-Ocean., 110, C12013, https://doi.org/10.1029/2004JC002797, 2005. 
Bart, P. J. and Kratochvil, M.: A paleo-perspective on West Antarctic Ice Sheet retreat, Sci. Rep., 12, 17693, https://doi.org/10.1038/s41598-022-22450-3, 2022. 
Bensi, M., Kovačević, V., Donda, F., O'Brien, P. E., Armbrecht, L., and Armand, L. K.: Water masses distribution offshore the Sabrina Coast (East Antarctica), Earth Syst. Sci. Data, 14, 65–78, https://doi.org/10.5194/essd-14-65-2022, 2022. 
Bianchi, C. and Gersonde, R.: The Southern Ocean surface between Marine Isotope Stages 6 and 5d: Shape and timing of climate changes, Palaeogeogr., Palaeoclimatol., 187, 151–177, https://doi.org/10.1016/S0031-0182(02)00516-3, 2002. 
Bindoff, N. L., Rosenberg, M. A., and Warner, M. J.: On the circulation and water masses over the Antarctic continental slope and rise between 80 and 150° E, Deep-Sea Res. Pt. II, 47, 2299–2326, https://doi.org/10.1016/S0967-0645(00)00038-2, 2000. 
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Short summary
We quantify sea surface temperature (SST) in the past Southern Ocean using the diatom Fragilariopsis kerguelensis that displays variable population with SST.  We explore the use of this relatively new proxy by applying it to sediment assemblages from the Sabrina Coast and Amundsen Sea. We find that Amundsen Sea and Sabrina Coast F. kerguelensis populations are different from each other.  An understanding of F. kerguelensis dynamics may help us generate an SST proxy to apply to ancient sediments.