Articles | Volume 19, issue 4
https://doi.org/10.5194/cp-19-787-2023
https://doi.org/10.5194/cp-19-787-2023
Research article
 | 
04 Apr 2023
Research article |  | 04 Apr 2023

Lipid-biomarker-based sea surface temperature record offshore Tasmania over the last 23 million years

Suning Hou, Foteini Lamprou, Frida S. Hoem, Mohammad Rizky Nanda Hadju, Francesca Sangiorgi, Francien Peterse, and Peter K. Bijl

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Latest update: 16 Jul 2024
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Short summary
Neogene climate cooling is thought to be accompanied by increased Equator-to-pole temperature gradients, but mid-latitudes are poorly represented. We use biomarkers to reconstruct a 23 Myr continuous sea surface temperature record of the mid-latitude Southern Ocean. We note a profound mid-latitude cooling which narrowed the latitudinal temperature gradient with the northward expansion of subpolar conditions. We surmise that this reflects the strengthening of the ACC and the expansion of sea ice.